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126 results on '"Estrany, Joan"'

1. Assessing changes in global fire regimes

Author: Swiss Academy of Sciences, Chinese Academy of Sciences, University of Bern, National Science Foundation (US), Utah's Watershed Restoration Initiative, Brigham Young University, National Science Centre (Poland), European Research Council, Fundação para a Ciência e a Tecnologia (Portugal), López Sáez, José Antonio [0000-0002-3122-2744], Sayedi, Sayedeh Sara, Abbott, Benjamin W., Vannière, Boris, Leys, Bérangère, Colombaroli, Daniele, Gil-Romera, Graciela, Słowiński, Michał, Aleman, Julie C., Blarquez, Olivier, Feurdean, Angelica, Brown, Kendrick, Ruan, Yanming, Rudaya, Natalia, Russell‑Smith, Jeremy, Seppä, Heikki, Shumilovskikh, Lyudmila, Sommers, William T., Tavşanoğlu, Çağatay, Umbanhowar, Charles, Urquiaga, Erickson, Urrego, Dunia, Vachula, Richard S., Wallenius, Tuomo, You, Chao, Daniau, Anne‑Laure, Aakala, Tuomas, Alenius, Teija, Allen, Kathryn, Andric, Maja, Bergeron, Yves, Biagioni, Siria, Bradshaw, Richard, Bremond, Laurent, Brisset, Elodie, Brooks, Joseph, Brugger, Sandra O., Brussel, Thomas, Cadd, Haidee, Cagliero, Eleonora, Carcaillet, Christopher, Carter, Vachel, Catry, Filipe X., Champreux, Antoine, Chaste, Emeline, Chavardès, Raphaël Daniel, Chipman, Melissa, Conedera, Marco, Connor, Simon, Constantine, Mark, Mustaphi, Colin Courtney, Dabengwa, Abraham N., Daniels, William, De Boer, Erik, Dietze, Elisabeth, Estrany, Joan, Fernandes, Paulo, Finsinger, Walter, Flantua, Suzette G. A., Fox‑Hughes, Paul, Gaboriau, Dorian M., Gayo, Eugenia M., Girardin, Martin. P., Glenn, Jefrey, Glückler, Ramesh, González‑Arango, Catalina, Groves, Mariangelica, Hamilton, Douglas S., Hamilton, Rebecca Jenner, Hantson, Stijn, Hapsari, K. Anggi, Hardiman, Mark, Hawthorne, Donna, Hofman, Kira, Inoue, Jun, Karp, Allison T., Krebs, Patrik, Kulkarni, Charuta, Kuosmanen, Niina, Lacourse, Terri, Ledru, Marie‑Pierre, Lestienne, Marion, Long, Colin, López Sáez, José Antonio, Loughlin, Nicholas, Niklasson, Mats, Madrigal, Javier, Maezumi, S. Yoshi, Marcisz, Katarzyna, Mariani, Michela, McWethy, David, Meyer, Grant, Molinari, Chiara, Montoya, Encarni, Mooney, Scott, Morales‑Molino, César, Morris, Jesse, Moss, Patrick, Oliveras, Imma, Pereira, José Miguel, Pezzatti, Gianni Boris, Pickarski, Nadine, Pini, Roberta, Rehn, Emma, Remy, Cécile C., Revelles, Jordi, Rius, Damien, Robin, Vincent, Swiss Academy of Sciences, Chinese Academy of Sciences, University of Bern, National Science Foundation (US), Utah's Watershed Restoration Initiative, Brigham Young University, National Science Centre (Poland), European Research Council, Fundação para a Ciência e a Tecnologia (Portugal), López Sáez, José Antonio [0000-0002-3122-2744], Sayedi, Sayedeh Sara, Abbott, Benjamin W., Vannière, Boris, Leys, Bérangère, Colombaroli, Daniele, Gil-Romera, Graciela, Słowiński, Michał, Aleman, Julie C., Blarquez, Olivier, Feurdean, Angelica, Brown, Kendrick, Ruan, Yanming, Rudaya, Natalia, Russell‑Smith, Jeremy, Seppä, Heikki, Shumilovskikh, Lyudmila, Sommers, William T., Tavşanoğlu, Çağatay, Umbanhowar, Charles, Urquiaga, Erickson, Urrego, Dunia, Vachula, Richard S., Wallenius, Tuomo, You, Chao, Daniau, Anne‑Laure, Aakala, Tuomas, Alenius, Teija, Allen, Kathryn, Andric, Maja, Bergeron, Yves, Biagioni, Siria, Bradshaw, Richard, Bremond, Laurent, Brisset, Elodie, Brooks, Joseph, Brugger, Sandra O., Brussel, Thomas, Cadd, Haidee, Cagliero, Eleonora, Carcaillet, Christopher, Carter, Vachel, Catry, Filipe X., Champreux, Antoine, Chaste, Emeline, Chavardès, Raphaël Daniel, Chipman, Melissa, Conedera, Marco, Connor, Simon, Constantine, Mark, Mustaphi, Colin Courtney, Dabengwa, Abraham N., Daniels, William, De Boer, Erik, Dietze, Elisabeth, Estrany, Joan, Fernandes, Paulo, Finsinger, Walter, Flantua, Suzette G. A., Fox‑Hughes, Paul, Gaboriau, Dorian M., Gayo, Eugenia M., Girardin, Martin. P., Glenn, Jefrey, Glückler, Ramesh, González‑Arango, Catalina, Groves, Mariangelica, Hamilton, Douglas S., Hamilton, Rebecca Jenner, Hantson, Stijn, Hapsari, K. Anggi, Hardiman, Mark, Hawthorne, Donna, Hofman, Kira, Inoue, Jun, Karp, Allison T., Krebs, Patrik, Kulkarni, Charuta, Kuosmanen, Niina, Lacourse, Terri, Ledru, Marie‑Pierre, Lestienne, Marion, Long, Colin, López Sáez, José Antonio, Loughlin, Nicholas, Niklasson, Mats, Madrigal, Javier, Maezumi, S. Yoshi, Marcisz, Katarzyna, Mariani, Michela, McWethy, David, Meyer, Grant, Molinari, Chiara, Montoya, Encarni, Mooney, Scott, Morales‑Molino, César, Morris, Jesse, Moss, Patrick, Oliveras, Imma, Pereira, José Miguel, Pezzatti, Gianni Boris, Pickarski, Nadine, Pini, Roberta, Rehn, Emma, Remy, Cécile C., Revelles, Jordi, Rius, Damien, and Robin, Vincent
Abstract: [Background] The global human footprint has fundamentally altered wildfire regimes, creating serious consequences for human health, biodiversity, and climate. However, it remains difficult to project how long-term interactions among land use, management, and climate change will affect fire behavior, representing a key knowledge gap for sustainable management. We used expert assessment to combine opinions about past and future fire regimes from 99 wildfire researchers. We asked for quantitative and qualitative assessments of the frequency, type, and implications of fire regime change from the beginning of the Holocene through the year 2300., [Results] Respondents indicated some direct human influence on wildfire since at least ~ 12,000 years BP, though natural climate variability remained the dominant driver of fire regime change until around 5,000 years BP, for most study regions. Responses suggested a ten-fold increase in the frequency of fire regime change during the last 250 years compared with the rest of the Holocene, corresponding first with the intensification and extensification of land use and later with anthropogenic climate change. Looking to the future, fire regimes were predicted to intensify, with increases in frequency, severity, and size in all biomes except grassland ecosystems. Fire regimes showed different climate sensitivities across biomes, but the likelihood of fire regime change increased with higher warming scenarios for all biomes. Biodiversity, carbon storage, and other ecosystem services were predicted to decrease for most biomes under higher emission scenarios. We present recommendations for adaptation and mitigation under emerging fire regimes, while recognizing that management options are constrained under higher emission scenarios., [Conclusion] The influence of humans on wildfire regimes has increased over the last two centuries. The perspective gained from past fires should be considered in land and fire management strategies, but novel fire behavior is likely given the unprecedented human disruption of plant communities, climate, and other factors. Future fire regimes are likely to degrade key ecosystem services, unless climate change is aggressively mitigated. Expert assessment complements empirical data and modeling, providing a broader perspective of fire science to inform decision making and future research priorities.
Published: 2024

2. Gestión integral del riesgo de inundación en pequeñas cuencas mediterráneas: instrumentos de monitorización y protocolos en el ámbito municipal

Author: Universidad de Alicante. Departamento de Análisis Geográfico Regional y Geografía Física, Ruiz-Perez, Maurici, Moragues, Alexandre, Olcina, Jorge, Pérez Morales, Alfredo, Gil-Guirado, Salvador, García-Comendador, Julián, Fortesa, Josep, Tomàs-Burgera, Miquel, Estrany, Joan, Universidad de Alicante. Departamento de Análisis Geográfico Regional y Geografía Física, Ruiz-Perez, Maurici, Moragues, Alexandre, Olcina, Jorge, Pérez Morales, Alfredo, Gil-Guirado, Salvador, García-Comendador, Julián, Fortesa, Josep, Tomàs-Burgera, Miquel, and Estrany, Joan
Abstract: La gestión del riesgo de inundación a escala local precisa de instrumentos metodológicos que den apoyo a la toma de decisiones de forma rápida y eficiente. A partir de datos recogidos por estaciones hidrométricas, ubicadas en puntos estratégicos de las cuencas de drenaje, es posible el desarrollo de instrumentos de monitorización de la precipitación y del caudal de los ríos y torrentes. La correlación entre los datos registrados y los episodios de inundación facilitan la puesta en marcha de sistemas de alerta temprana. En este marco se trabaja en el desarrollo de instrumentos de ayuda a la gestión del riesgo a nivel municipal. La información del peligro de inundación se combina con información territorial (catastro, ocupación del suelo, infraestructuras, etc.) mediante el uso de sistemas de información geográfica para realizar una evaluación integrada de la vulnerabilidad por exposición. En este artículo se presentan resultados iniciales del análisis de la vulnerabilidad frente a inundaciones de la ciudad de Palma (Illes Balears). Los resultados muestran un elevado grado de exposición de las zonas residenciales del este de la ciudad constatando incrementos considerables en los últimos decenios., Flood risk management at the local scale requires methodological tools to support decision-making in an efficient way. Based on data collected by hydrometric stations, located at strategic points in drainage river catchments, it is possible to develop tools for monitoring their rainfall and runoff dynamics. The correlation between the data recorded and flood episodes facilitates the implementation of early warning systems. In this framework, work is ongoing to develop tools to support risk management at the municipal scale. Flood hazard information is combined with territorial one (cadastre, land use, infrastructures, etc.) through the use of geographic information systems to perform an integrated vulnerability assessment by exposure. This communication presents the initial results of the vulnerability assessment to flooding in the city of Palma (Balearic Islands). The results showed a high degree of exposure of the residential areas in the east of the city, with considerable increases in recent decades.
Published: 2023

3. Els temporals destructius als boscos de les Illes Balears. 2001-2021

Author: Estrany, Joan, ed., Calvo-Cases, Adolfo, ed., Santana, Joan A., ed., Estrany, Joan, ed., Calvo-Cases, Adolfo, ed., and Santana, Joan A., ed.
Abstract: [CAT] El segle XXI serà recordat, de ben segur, per una multitud d’esdeveniments, però no hi ha dubte que passarà a la història com el segle en què es començaren a notar els efectes del que s’ha vingut a dir el canvi climàtic, això és, la primera gran variació d’origen antròpic (provocada pels efectes de l’activitat humana) de les condicions climàtiques del planeta. Un dels efectes més tangibles d’aquest nou període que comença és una major proliferació dels fenòmens meteorològics adversos i extrems, moltes vegades amb efectes catastròfics. Un dels més greus que s’ha patit a les Illes Balears els darrers 20 anys es va produir els dies 10 i 11 de novembre de 2001, quan un temporal ciclònic de vent va afectar greument tota la conca mediterrània occidental. A Mallorca, quatre persones varen perdre la vida i diverses resultaren ferides; unes 175.000 persones es quedaren sense llum i es van haver de tallar 29 carreteres. L’impacte socioeconòmic fou brutal (es calcularen pèrdues per valor de més de 37 milions d’euros) i les modificacions substancials en el paisatge encara són paleses en alguns indrets de l’illa dues dècades després. L’anàlisi geoambiental exhaustiva d’aquest i d’altres tres temporals de vent significatius que afectaren els boscos de les Illes Balears és l’objecte d’estudi d’aquesta publicació que sorgeix fruit de la col·laboració interadministrativa entre la Universitat de les Illes Balears i la Conselleria de Medi Ambient i Territori. Aquest estudi pretén aprofundir en el coneixement de les dinàmiques dels nostres ecosistemes i hàbitats insulars, especialment després del greu impacte produït per una pertorbació natural com són els temporals de vent, un fenomen intrínsec a les regions de climes mediterranis, però que, en el context actual, en què es produeix un efecte combinat entre l’escalfament global i els canvis dràstics en els usos del sòl, tendeix a intensificar-se.
Published: 2022

4. Els temporals destructius als boscos de les Illes Balears. 2001-2021

Author: Estrany, Joan, ed., Calvo-Cases, Adolfo, ed., Santana, Joan A., ed., Estrany, Joan, ed., Calvo-Cases, Adolfo, ed., and Santana, Joan A., ed.
Abstract: [CAT] El segle XXI serà recordat, de ben segur, per una multitud d’esdeveniments, però no hi ha dubte que passarà a la història com el segle en què es començaren a notar els efectes del que s’ha vingut a dir el canvi climàtic, això és, la primera gran variació d’origen antròpic (provocada pels efectes de l’activitat humana) de les condicions climàtiques del planeta. Un dels efectes més tangibles d’aquest nou període que comença és una major proliferació dels fenòmens meteorològics adversos i extrems, moltes vegades amb efectes catastròfics. Un dels més greus que s’ha patit a les Illes Balears els darrers 20 anys es va produir els dies 10 i 11 de novembre de 2001, quan un temporal ciclònic de vent va afectar greument tota la conca mediterrània occidental. A Mallorca, quatre persones varen perdre la vida i diverses resultaren ferides; unes 175.000 persones es quedaren sense llum i es van haver de tallar 29 carreteres. L’impacte socioeconòmic fou brutal (es calcularen pèrdues per valor de més de 37 milions d’euros) i les modificacions substancials en el paisatge encara són paleses en alguns indrets de l’illa dues dècades després. L’anàlisi geoambiental exhaustiva d’aquest i d’altres tres temporals de vent significatius que afectaren els boscos de les Illes Balears és l’objecte d’estudi d’aquesta publicació que sorgeix fruit de la col·laboració interadministrativa entre la Universitat de les Illes Balears i la Conselleria de Medi Ambient i Territori. Aquest estudi pretén aprofundir en el coneixement de les dinàmiques dels nostres ecosistemes i hàbitats insulars, especialment després del greu impacte produït per una pertorbació natural com són els temporals de vent, un fenomen intrínsec a les regions de climes mediterranis, però que, en el context actual, en què es produeix un efecte combinat entre l’escalfament global i els canvis dràstics en els usos del sòl, tendeix a intensificar-se.
Published: 2022

5. Influence of weather types on the hydrosedimentary response in three small catchments on the Island of Mallorca, Spain

Author: Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), European Commission, Ministerio de Economía y Competitividad (España), Gobierno de Aragón, Ministerio de Educación y Cultura (España), Govern de les Illes Balears, Tomás-Burguera, Miquel [0000-0002-3035-4171], Peña-Angulo, Dhais, Estrany, Joan, García-Comendador, Julián, Fortes, Josep, Tomás-Burguera, Miquel, Company, Jaume, Alorda, Bartomeu, Nadal-Romero, Estela, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), European Commission, Ministerio de Economía y Competitividad (España), Gobierno de Aragón, Ministerio de Educación y Cultura (España), Govern de les Illes Balears, Tomás-Burguera, Miquel [0000-0002-3035-4171], Peña-Angulo, Dhais, Estrany, Joan, García-Comendador, Julián, Fortes, Josep, Tomás-Burguera, Miquel, Company, Jaume, Alorda, Bartomeu, and Nadal-Romero, Estela
Abstract: The influence of the sea and topography are vital factors in the atmospheric processes affecting any island, as they introduce peculiarities in the hydrosedimentary response of fluvial systems. In view of that, the relationship between the surface atmospheric conditions (weather types, WTs), rainfall, runoff and erosion dynamics in three small catchments located in Mallorca were analysed. The catchments are representative in terms of geomorphology and land use but also due to their location within the major rainfall areas previously identified in the island by (Sumner et al., 1993). Data of rainfall, runoff and sediment variables, coupled with calculated WTs were used for the 2013–2017 period. WTs frequency and distribution during this period were compared to the last climatic period reference (1981–2010) to test the climate validity of the study period. The results illustrated how hydrosedimentary response was mostly caused by eco-geographical patterns but also by differences in the response of each catchment to WTs, related to the intrinsic geographical position in the island and different exposures to humid winds. Anticyclonic WT was the most frequent, despite it being only involved in one flood event at the eastern catchment. Conversely, eastern and northeastern WTs generated more than 85% of the total runoff and sediment, representing only 39% of flood events. The understanding of the specific role of WTs on the island's hydrology was improved, considering that freshwater resources are scarce and eco-sociologically crucial.
Published: 2021

6. Hydrogeomorphological analysis and modelling for a comprehensive understanding of flash-flood damage processes: the 9 October 2018 event in northeastern Mallorca

Author: Universitat Politècnica de València. Instituto Universitario de Ingeniería del Agua y del Medio Ambiente - Institut Universitari d'Enginyeria de l'Aigua i Medi Ambient, Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient, Agencia Estatal de Investigación, European Regional Development Fund, Estrany, Joan, Ruiz-Perez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nacher Rodriguez, Beatriz, Tomas-Burguera, Miquel, Garcia-Comendador, Julian, Pena, Xavier, Calvo-Cases, Adolfo, Vallés-Morán, F. J., Universitat Politècnica de València. Instituto Universitario de Ingeniería del Agua y del Medio Ambiente - Institut Universitari d'Enginyeria de l'Aigua i Medi Ambient, Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient, Agencia Estatal de Investigación, European Regional Development Fund, Estrany, Joan, Ruiz-Perez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nacher Rodriguez, Beatriz, Tomas-Burguera, Miquel, Garcia-Comendador, Julian, Pena, Xavier, Calvo-Cases, Adolfo, and Vallés-Morán, F. J.
Abstract: [EN] A flash-flood event hit the northeastern part of Mallorca on 9 October 2018, causing 13 casualties. Mal- lorca is prone to catastrophic flash floods acting on a sce- nario of deep landscape transformation caused by Mediter- ranean tourist resorts. As global change may exacerbate dev- astating flash floods, analyses of catastrophic events are cru- cial to support effective prevention and mitigation measures. Field-based remote-sensing and modelling techniques were used in this study to evaluate rainfall¿runoff processes at the catchment scale linked to hydrological modelling. Continu- ous streamflow monitoring data revealed a peak discharge of 442 m³ s¿¹ with an unprecedented runoff response. This ex- ceptional behaviour triggered the natural disaster as a com- bination of heavy rainfall (249 mm in 10 h), karstic features and land cover disturbances in the Begura de Salma River catchment (23 km²). Topography-based connectivity indices and geomorphic change detection were used as rapid post- catastrophe decision-making tools, playing a key role dur- ing the rescue search. These hydrogeomorphological preci- sion techniques were combined with the Copernicus Emer- gency Management Service and ¿ground-based¿ damage as- sessment, which showed very accurately the damage-driving factors in the village of Sant Llorenç des Cardassar. The main challenges in the future are to readapt hydrological modelling to global change scenarios, implement an early flash-flood warning system and take adaptive and resilient measures on the catchment scale.
Published: 2020

7. Hydrogeomorphological analysis and modelling for a comprehensive understanding of flash-flood damage processes: the 9 October 2018 event in northeastern Mallorca

Author: Universitat Politècnica de València. Instituto Universitario de Ingeniería del Agua y del Medio Ambiente - Institut Universitari d'Enginyeria de l'Aigua i Medi Ambient, Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient, Agencia Estatal de Investigación, European Regional Development Fund, Estrany, Joan, Ruiz-Perez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nacher Rodriguez, Beatriz, Tomas-Burguera, Miquel, Garcia-Comendador, Julian, Pena, Xavier, Calvo-Cases, Adolfo, Vallés-Morán, F. J., Universitat Politècnica de València. Instituto Universitario de Ingeniería del Agua y del Medio Ambiente - Institut Universitari d'Enginyeria de l'Aigua i Medi Ambient, Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient, Agencia Estatal de Investigación, European Regional Development Fund, Estrany, Joan, Ruiz-Perez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nacher Rodriguez, Beatriz, Tomas-Burguera, Miquel, Garcia-Comendador, Julian, Pena, Xavier, Calvo-Cases, Adolfo, and Vallés-Morán, F. J.
Abstract: [EN] A flash-flood event hit the northeastern part of Mallorca on 9 October 2018, causing 13 casualties. Mal- lorca is prone to catastrophic flash floods acting on a sce- nario of deep landscape transformation caused by Mediter- ranean tourist resorts. As global change may exacerbate dev- astating flash floods, analyses of catastrophic events are cru- cial to support effective prevention and mitigation measures. Field-based remote-sensing and modelling techniques were used in this study to evaluate rainfall¿runoff processes at the catchment scale linked to hydrological modelling. Continu- ous streamflow monitoring data revealed a peak discharge of 442 m³ s¿¹ with an unprecedented runoff response. This ex- ceptional behaviour triggered the natural disaster as a com- bination of heavy rainfall (249 mm in 10 h), karstic features and land cover disturbances in the Begura de Salma River catchment (23 km²). Topography-based connectivity indices and geomorphic change detection were used as rapid post- catastrophe decision-making tools, playing a key role dur- ing the rescue search. These hydrogeomorphological preci- sion techniques were combined with the Copernicus Emer- gency Management Service and ¿ground-based¿ damage as- sessment, which showed very accurately the damage-driving factors in the village of Sant Llorenç des Cardassar. The main challenges in the future are to readapt hydrological modelling to global change scenarios, implement an early flash-flood warning system and take adaptive and resilient measures on the catchment scale.
Published: 2020

8. Hydrogeomorphological analysis and modelling for a comprehensive understanding of flash-flood damage processes: the 9 October 2018 event in northeastern Mallorca

Author: Universitat Politècnica de València. Instituto Universitario de Ingeniería del Agua y del Medio Ambiente - Institut Universitari d'Enginyeria de l'Aigua i Medi Ambient, Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient, Agencia Estatal de Investigación, European Regional Development Fund, Estrany, Joan, Ruiz-Perez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nacher Rodriguez, Beatriz, Tomas-Burguera, Miquel, Garcia-Comendador, Julian, Pena, Xavier, Calvo-Cases, Adolfo, Vallés-Morán, F. J., Universitat Politècnica de València. Instituto Universitario de Ingeniería del Agua y del Medio Ambiente - Institut Universitari d'Enginyeria de l'Aigua i Medi Ambient, Universitat Politècnica de València. Departamento de Ingeniería Hidráulica y Medio Ambiente - Departament d'Enginyeria Hidràulica i Medi Ambient, Agencia Estatal de Investigación, European Regional Development Fund, Estrany, Joan, Ruiz-Perez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nacher Rodriguez, Beatriz, Tomas-Burguera, Miquel, Garcia-Comendador, Julian, Pena, Xavier, Calvo-Cases, Adolfo, and Vallés-Morán, F. J.
Abstract: [EN] A flash-flood event hit the northeastern part of Mallorca on 9 October 2018, causing 13 casualties. Mal- lorca is prone to catastrophic flash floods acting on a sce- nario of deep landscape transformation caused by Mediter- ranean tourist resorts. As global change may exacerbate dev- astating flash floods, analyses of catastrophic events are cru- cial to support effective prevention and mitigation measures. Field-based remote-sensing and modelling techniques were used in this study to evaluate rainfall¿runoff processes at the catchment scale linked to hydrological modelling. Continu- ous streamflow monitoring data revealed a peak discharge of 442 m³ s¿¹ with an unprecedented runoff response. This ex- ceptional behaviour triggered the natural disaster as a com- bination of heavy rainfall (249 mm in 10 h), karstic features and land cover disturbances in the Begura de Salma River catchment (23 km²). Topography-based connectivity indices and geomorphic change detection were used as rapid post- catastrophe decision-making tools, playing a key role dur- ing the rescue search. These hydrogeomorphological preci- sion techniques were combined with the Copernicus Emer- gency Management Service and ¿ground-based¿ damage as- sessment, which showed very accurately the damage-driving factors in the village of Sant Llorenç des Cardassar. The main challenges in the future are to readapt hydrological modelling to global change scenarios, implement an early flash-flood warning system and take adaptive and resilient measures on the catchment scale.
Published: 2020

9. Climate and land use change effects on soil erosion in two small agricultural catchment systems Fugnitz - Austria, Can Revull - Spain

Author: Luetzenburg, Gregor, Bittner, Meriel Jennifer, Calsamiglia, Aleix, Renschler, Chris S., Estrany, Joan, Poeppl, Ronald, Luetzenburg, Gregor, Bittner, Meriel Jennifer, Calsamiglia, Aleix, Renschler, Chris S., Estrany, Joan, and Poeppl, Ronald
Published: 2020

10. Runoff and soil moisture as driving factors in suspended sediment transport of a small mid-mountain Mediterranean catchment

Author: Ministerio de Ciencia, Innovación y Universidades (España), Fortesa, Josep, Latron, Jérôme, García-Comendador, Julián, Company, Jaume, Estrany, Joan, Ministerio de Ciencia, Innovación y Universidades (España), Fortesa, Josep, Latron, Jérôme, García-Comendador, Julián, Company, Jaume, and Estrany, Joan
Abstract: Soil moisture conditions play a key role in runoff and sediment load dynamics in river catchments of contrasting ecosystems. However, the highly marked seasonality of Mediterranean climate affects hydrological processes and sediment transport strongly, as evapotranspiration determines a succession of wet, transition and dry periods throughout a hydrological year. This study examines results of soil moisture, water and sediment fluxes during five hydrological years in a representative small mid-mountain Mediterranean catchment. It aims to assess the sediment load contribution and its variability at different temporal scales. Precipitation, runoff and suspended sediment load were calculated at annual, seasonal and event scales to assess inter- and intra-annual variability. A database with 45 events was used to identify the main controlling factors over sediment load thought bivariate relationships and an analysis of soil moisture-discharge and discharge-suspended sediment concentration hysteresis. At the annual scale, lithology, land use and soil conservation structures characteristic of the catchment caused low values of sediment yield, although inter-annual rates varied by up to three orders of magnitude (0.08 to 11.86 t km−2 y−1). Seasonal analysis of accumulated sediment load showed that 80% was generated during the autumn and winter seasons. At the event scale, streamflow and soil moisture were the controlling factors for the largest sediment load contributions. The highest frequency of clockwise discharge-suspended sediment concentration hysteresis revealed that most of the sediment was generated from nearby sources, although the largest sediment loads were contributed under wet antecedent conditions, as depicted by the soil moisture-discharge hysteresis assessment.
Published: 2020

11. Hydrogeomorphological analysis and modelling for a comprehensive understanding of flash-flood damage processes: the 9 October 2018 event in northeastern Mallorca

Author: Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Tomás-Burguera, Miquel [0000-0002-3035-4171], Estrany, Joan, Ruiz-Pérez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nácher-Rodríguez, Beatriz, Tomás-Burguera, Miquel, García-Comendador, Julián, Peña, Xavier, Calvo-Cases, Adolfo, Vallés-Morán, Francisco J., Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Tomás-Burguera, Miquel [0000-0002-3035-4171], Estrany, Joan, Ruiz-Pérez, Maurici, Mutzner, Raphael, Fortesa, Josep, Nácher-Rodríguez, Beatriz, Tomás-Burguera, Miquel, García-Comendador, Julián, Peña, Xavier, Calvo-Cases, Adolfo, and Vallés-Morán, Francisco J.
Abstract: A flash-flood event hit the northeastern part of Mallorca on 9 October 2018, causing 13 casualties. Mallorca is prone to catastrophic flash floods acting on a scenario of deep landscape transformation caused by Mediterranean tourist resorts. As global change may exacerbate devastating flash floods, analyses of catastrophic events are crucial to support effective prevention and mitigation measures. Field-based remote-sensing and modelling techniques were used in this study to evaluate rainfall–runoff processes at the catchment scale linked to hydrological modelling. Continuous streamflow monitoring data revealed a peak discharge of 442 m3 s−1 with an unprecedented runoff response. This exceptional behaviour triggered the natural disaster as a combination of heavy rainfall (249 mm in 10 h), karstic features and land cover disturbances in the Begura de Salma River catchment (23 km2). Topography-based connectivity indices and geomorphic change detection were used as rapid post-catastrophe decision-making tools, playing a key role during the rescue search. These hydrogeomorphological precision techniques were combined with the Copernicus Emergency Management Service and “ground-based” damage assessment, which showed very accurately the damage-driving factors in the village of Sant Llorenç des Cardassar. The main challenges in the future are to readapt hydrological modelling to global change scenarios, implement an early flash-flood warning system and take adaptive and resilient measures on the catchment scale.
Published: 2020

12. Relationship of Weather Types on the Seasonal and Spatial Variability of Rainfall, Runoff, and Sediment Yield in the Western Mediterranean Basin

Author: Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Gobierno de Aragón, Eusko Jaurlaritza, Generalitat de Catalunya, Junta de Castilla y León, Peña-Angulo, Dhais, Nadal-Romero, Estela, González Hidalgo, José Carlos, Albaladejo Montoro, Juan, Andreu Pérez, V., Bahri, H., Bernal, Susana, Biddoccu, Marcella, Bienes, Ramón, Campo, Julián, Campo-Bescós, M. A., Canatário-Duarte, Antonio, Cantón, Yolanda, Casalí, Javier, Castillo Ruiz, Víctor, Cavallo, Eugenio, Cerdà, Artemi, Cid, Patricio, Cortesi, Nicola, Desir, Gloria, Díaz-Pereira, Elvira, Espigares, T., Estrany, Joan, Farguell, J., Fernández-Raga, María, Ferreira, Carla S. S., Ferro, V., Gallart Gallego, Francesc, Giménez, R., Gimeno-García, Eugenia, Gómez Calero, José Alfonso, Gómez-Gutiérrez, Anna, Gómez Macpherson, H., González-Pelayo, Óscar, Kairis, O., Karatzas, G. P., Keesstra, Saskia, Klotz, S., Kosmas, C., Lana-Renault, Noemí, Lasanta Martínez, Teodoro, Latron, Jérôme, Lázaro, Roberto, Le Bissonnais, Y., Le Bouteiller, C., Licciardello, Feliciana, López-Tarazón, José A., Lucía, Ana, Marín-Moreno, V. M., Marín, Cinta, Marqués, María José, Martínez-Fernández, José, Martínez-Mena García, M. Dolores, Mateos, Luciano, Mathys, N., Merino-Martín, L., Moreno de las Heras, Mariano, Moustakas, N., Nicolau, J. M., Pampalone, V., Raclot, Damien, Rodríguez-Blanco, M. Luz, Rodrigo Comino, Jesús, Romero Díaz, Asunción, Ruiz Sinoga, José Damián, Rubio, José Luis, Schnabel, Susanne, Senciales-González, J. M., Solé-Benet, Albert, Taguas, E. V., Taboada-Castro, M. Teresa, Taboada-Castro, M. Mercedes, Todisco, F., Úbeda, Xavier, Varouchakis, E. A., Wittenberg, L., Zabaleta, Ane, Zorn, M., Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Gobierno de Aragón, Eusko Jaurlaritza, Generalitat de Catalunya, Junta de Castilla y León, Peña-Angulo, Dhais, Nadal-Romero, Estela, González Hidalgo, José Carlos, Albaladejo Montoro, Juan, Andreu Pérez, V., Bahri, H., Bernal, Susana, Biddoccu, Marcella, Bienes, Ramón, Campo, Julián, Campo-Bescós, M. A., Canatário-Duarte, Antonio, Cantón, Yolanda, Casalí, Javier, Castillo Ruiz, Víctor, Cavallo, Eugenio, Cerdà, Artemi, Cid, Patricio, Cortesi, Nicola, Desir, Gloria, Díaz-Pereira, Elvira, Espigares, T., Estrany, Joan, Farguell, J., Fernández-Raga, María, Ferreira, Carla S. S., Ferro, V., Gallart Gallego, Francesc, Giménez, R., Gimeno-García, Eugenia, Gómez Calero, José Alfonso, Gómez-Gutiérrez, Anna, Gómez Macpherson, H., González-Pelayo, Óscar, Kairis, O., Karatzas, G. P., Keesstra, Saskia, Klotz, S., Kosmas, C., Lana-Renault, Noemí, Lasanta Martínez, Teodoro, Latron, Jérôme, Lázaro, Roberto, Le Bissonnais, Y., Le Bouteiller, C., Licciardello, Feliciana, López-Tarazón, José A., Lucía, Ana, Marín-Moreno, V. M., Marín, Cinta, Marqués, María José, Martínez-Fernández, José, Martínez-Mena García, M. Dolores, Mateos, Luciano, Mathys, N., Merino-Martín, L., Moreno de las Heras, Mariano, Moustakas, N., Nicolau, J. M., Pampalone, V., Raclot, Damien, Rodríguez-Blanco, M. Luz, Rodrigo Comino, Jesús, Romero Díaz, Asunción, Ruiz Sinoga, José Damián, Rubio, José Luis, Schnabel, Susanne, Senciales-González, J. M., Solé-Benet, Albert, Taguas, E. V., Taboada-Castro, M. Teresa, Taboada-Castro, M. Mercedes, Todisco, F., Úbeda, Xavier, Varouchakis, E. A., Wittenberg, L., Zabaleta, Ane, and Zorn, M.
Abstract: Rainfall is the key factor to understand soil erosion processes, mechanisms, and rates. Most research was conducted to determine rainfall characteristics and their relationship with soil erosion (erosivity) but there is little information about how atmospheric patterns control soil losses, and this is important to enable sustainable environmental planning and risk prevention. We investigated the temporal and spatial variability of the relationships of rainfall, runoff, and sediment yield with atmospheric patterns (weather types, WTs) in the western Mediterranean basin. For this purpose, we analyzed a large database of rainfall events collected between 1985 and 2015 in 46 experimental plots and catchments with the aim to: (i) evaluate seasonal differences in the contribution of rainfall, runoff, and sediment yield produced by the WTs; and (ii) to analyze the seasonal efficiency of the different WTs (relation frequency and magnitude) related to rainfall, runoff, and sediment yield. The results indicate two different temporal patterns: the first weather type exhibits (during the cold period: autumn and winter) westerly flows that produce the highest rainfall, runoff, and sediment yield values throughout the territory; the second weather type exhibits easterly flows that predominate during the warm period (spring and summer) and it is located on the Mediterranean coast of the Iberian Peninsula. However, the cyclonic situations present high frequency throughout the whole year with a large influence extended around the western Mediterranean basin. Contrary, the anticyclonic situations, despite of its high frequency, do not contribute significantly to the total rainfall, runoff, and sediment (showing the lowest efficiency) because of atmospheric stability that currently characterize this atmospheric pattern. Our approach helps to better understand the relationship of WTs on the seasonal and spatial variability of rainfall, runoff and sediment yield with a regional scale ba
Published: 2020

13. Multiple Temporal Scales Assessment in the Hydrological Response of Small Mediterranean-Climate Catchments

Author: Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Govern de les Illes Balears, Ministerio de Educación, Cultura y Deporte (España), Ministerio de Ciencia e Innovación (España), Tomás-Burguera, Miquel [0000-0002-3035-4171], Fortesa, Josep, Latron, Jérôme, García-Comendador, Julián, Tomás-Burguera, Miquel, Company, Jaume, Calsamiglia, Aleix, Estrany, Joan, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Govern de les Illes Balears, Ministerio de Educación, Cultura y Deporte (España), Ministerio de Ciencia e Innovación (España), Tomás-Burguera, Miquel [0000-0002-3035-4171], Fortesa, Josep, Latron, Jérôme, García-Comendador, Julián, Tomás-Burguera, Miquel, Company, Jaume, Calsamiglia, Aleix, and Estrany, Joan
Abstract: Mediterranean-climate catchments are characterized by significant spatial and temporal hydrological variability caused by the interaction of natural as well human-induced abiotic and biotic factors. This study investigates the non-linearity of rainfall-runoff relationship at multiple temporal scales in representative small Mediterranean-climate catchments (i.e., <10 km2) to achieve a better understanding of their hydrological response. The rainfall-runoff relationship was evaluated in 43 catchments at annual and event—203 events in 12 of these 43 catchments—scales. A linear rainfall-runoff relationship was observed at an annual scale, with a higher scatter in pervious (R2: 0.47) than impervious catchments (R2: 0.82). Larger scattering was observed at the event scale, although pervious lithology and agricultural land use promoted significant rainfall-runoff linear relations in winter and spring. These relationships were particularly analysed during five hydrological years in the Es Fangar catchment (3.35 km2; Mallorca, Spain) as a temporal downscaling to assess the intra-annual variability, elucidating whether antecedent wetness conditions played a significant role in runoff generation. The assessment of rainfall-runoff relationships under contrasted lithology, land use and seasonality is a useful approach to improve the hydrological modelling of global change scenarios in small catchments where the linearity and non-linearity of the hydrological response—at multiple temporal scales—can inherently co-exist in Mediterranean-climate catchments.
Published: 2020

14. Eco-geomorphological connectivity and coupling interactions at hillslope scale in drylands: Concepts and critical examples

Author: Ministerio de Economía y Competitividad (España), European Commission, Fundación Séneca, Calvo-Cases, Adolfo, Arnau Rosalén, Eva, Boix-Fayos, Carolina, Estrany, Joan, Roxo, Maria José, Symeonakis, Elias, Ministerio de Economía y Competitividad (España), European Commission, Fundación Séneca, Calvo-Cases, Adolfo, Arnau Rosalén, Eva, Boix-Fayos, Carolina, Estrany, Joan, Roxo, Maria José, and Symeonakis, Elias
Abstract: The diagnosis of land degradation requires a deep understanding of ecosystem functioning and evolution. In dryland systems, in particular, research efforts must address the redistribution of scarce resources for vegetation, in a context of high spatial heterogeneity and non-linear response. This fact explains the prevalence of eco-hydrological perspectives interested in runoff processes and, the more recent, focused on connectivity as an indicator of system resource optimisation. From a geomorphological perspective and reviewing the concepts of eco-hydro-geomorphological interactions operating in ecosystems, this paper explores the effects of erosion on vegetation configuration through two case studies at different spatio-temporal scales. We focus on the structure-function linkage, specifically on how morphological traits relate with different stages in the erosional sequence, both in the abiotic and the biotic domain. Results suggest that vegetation dynamics are affected by structural boundary conditions at both scales, i.e. by surface armouring related with rock fragments at the patch scale, and by the degree of hillslope-channel coupling at the hillslope scale. Our preliminary results can serve as new working hypotheses about the structure-function interplay on hillslopes. All this, taking advantage of the recent technological achievements for acquiring very high-resolution geospatial data that offer new analytical possibilities in a range of scales.
Published: 2020

15. Holocene demographic fluctuations, climate and erosion in the Mediterranean : A meta data-analysis

Author: Walsh, Kevin, Berger, Jean-François, Roberts, C. Neil, Vanniere, Boris, Ghilardi, Matthieu, Brown, Antony G., Woodbridge, Jessie, Lespez, Laurent, Estrany, Joan, Glais, Arthur, Palmisano, Alessio, Finné, Martin, Verstraeten, Gert, Walsh, Kevin, Berger, Jean-François, Roberts, C. Neil, Vanniere, Boris, Ghilardi, Matthieu, Brown, Antony G., Woodbridge, Jessie, Lespez, Laurent, Estrany, Joan, Glais, Arthur, Palmisano, Alessio, Finné, Martin, and Verstraeten, Gert
Abstract: As part of the Changing the Face of the Mediterranean Project, we consider how human pressure and concomitant erosion has affected a range of Mediterranean landscapes between the Neolithic and, in some cases, the post-medieval period. Part of this assessment comprises an investigation of relationships among palaeodemographic data, evidence for vegetation change and some consideration of rapid climate change events. The erosion data include recent or hitherto unpublished work from the authors. Where possible, we consider summed probabilities of 14C dates as well as the first published synthesis of all known optically stimulated luminescence dated sequences. The results suggest that while there were some periods when erosion took place contemporaneously across a number of regions, possibly induced by climate changes, more often than not, we see a complex and heterogeneous interplay of demographic and environmental changes that result in a mixed pattern of erosional activity across the Mediterranean.
Published: 2019
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16. Comparison of stage/discharge rating curves derived from different recording systems: Consequences for streamflow data and water management in a Mediterranean island

Author: Ministerio de Economía y Competitividad (España), Latron, J. [0000-0003-3253-6734], Fortesa, Josep, García-Comendador, Julián, Calsamiglia, Aleix, López-Tarazón, José Andrés, Latron, Jérôme, Alorda, Bartomeu, Estrany, Joan, Ministerio de Economía y Competitividad (España), Latron, J. [0000-0003-3253-6734], Fortesa, Josep, García-Comendador, Julián, Calsamiglia, Aleix, López-Tarazón, José Andrés, Latron, Jérôme, Alorda, Bartomeu, and Estrany, Joan
Abstract: Obtaining representative hydrometric values is essential for characterizing extreme events, hydrological dynamics and detecting possible changes on the long-term hydrology. Reliability of streamflow data requires a temporal continuity and a maintenance of the gauging stations, which data are affected by epistemic and random sources of error. An assessment of discharge meterings' and stage-discharge rating curves' uncertainties were carried out by comparing the accuracy of the measuring instruments of two different hydrometric networks (i.e., one analogical and one digital) established in the same river location at the Mediterranean island of Mallorca. Furthermore, the effects of such uncertainties were assessed on the hydrological dynamics, considering the significant global change impacts beset this island. Evaluation was developed at four representative gauging stations of the hydrographic network with analogic (≈40 years) and digital (≈10 years) data series. The study revealed that the largest source of uncertainty in the analogical (28 to 274%) and in the digital (17–37%) networks were the stage-discharge rating curves. Their impact on the water resources was also evaluated at the event and annual scales, resulting in an average difference of water yields of 183% and 142% respectively. Such improvement on the comprehension of hydrometric networks uncertainties will dramatically benefit the interpretation of the long-term streamflow by providing better insights into the hydrologic and flood hazard planning, management and modelling. © 2019
Published: 2019

17. Spatial variability of the relationships of runoff and sediment yield with weather types throughout the Mediterranean basin

Author: Govern de les Illes Balears, Generalitat de Catalunya, Fundação para a Ciência e a Tecnologia (Portugal), Ministerio de Educación, Cultura y Deporte (España), Ministerio de Economía y Competitividad (España), European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Universidad de Lleida, Ministerio de Educación y Ciencia (España), Peña-Angulo, Dhais, Nadal-Romero, Estela, González-Hidalgo, José C., Albaladejo, J., Andreu Pérez, V., Bagarello, V., Barhi, H., Batalla, Ramón J., Bernal, Susana, Bienes, Ramón, Campo, Julián, Campo-Bescós, M. A., Canatário-Duarte, Antonio, Cantón, Yolanda, Casalí, Javier, Castillo Sánchez, Victor Manuel, Cerdà, Artemi, Cheggour, A., Cid, Patricio, Cortesi, Nicola, Desir, Gloria, Díaz-Pereira, Elvira, Espigares, T., Estrany, Joan, Fernández-Raga, María, Ferreira, Carla S. S., Ferro, V., Gallart, Francesc, Giménez, R., Gimeno-García, Eugenia, Gómez Calero, José Alfonso, Gómez-Gutiérrez, Anna I., Gómez Macpherson, H., González-Pelayo, Óscar, Hueso-González, P., Kairis, O., Karatzas, G. P., Klotz, S., Kosmas, C., Lana-Renault, Noemí, Lasanta Martínez, Teodoro, Latron, Jérôme, Lázaro, Roberto, Le Bissonnais, Y., Le Bouteiller, C., Licciardello, Feliciana, López-Tarazón, José A., Lucía, Ana, Marín, Cinta, Marqués, María José, Martínez-Fernández, Julián, Martínez-Mena García, M. Dolores, Martínez-Murillo, Juan F., Mateos, Luciano, Mathys, N., Merino-Martín, L., Moreno-de-las-Heras, Mariano, Moustakas, N., Nicolau, J. M., Novara, A., Pampalone, V., Raclot, Damien, Rodríguez-Blanco, M. Luz, Rodrigo-Comino, J., Romero-Díaz, A., Roose, E., Rubio, José Luis, Ruiz-Sinoga, J. D., Schnabel, Susanne, Senciales-González, J. M., Simonneaux, V., Solé-Benet, Albert, Taguas, E. V., Taboada-Castro, M. Mercedes, Taboada-Castro, M. Teresa, Todisco, F., Úbeda, Xavier, Varouchakis, E. A., Vericat, Damià, Wittenberg, L., Zabaleta, Ane, Zorn, M., Govern de les Illes Balears, Generalitat de Catalunya, Fundação para a Ciência e a Tecnologia (Portugal), Ministerio de Educación, Cultura y Deporte (España), Ministerio de Economía y Competitividad (España), European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Universidad de Lleida, Ministerio de Educación y Ciencia (España), Peña-Angulo, Dhais, Nadal-Romero, Estela, González-Hidalgo, José C., Albaladejo, J., Andreu Pérez, V., Bagarello, V., Barhi, H., Batalla, Ramón J., Bernal, Susana, Bienes, Ramón, Campo, Julián, Campo-Bescós, M. A., Canatário-Duarte, Antonio, Cantón, Yolanda, Casalí, Javier, Castillo Sánchez, Victor Manuel, Cerdà, Artemi, Cheggour, A., Cid, Patricio, Cortesi, Nicola, Desir, Gloria, Díaz-Pereira, Elvira, Espigares, T., Estrany, Joan, Fernández-Raga, María, Ferreira, Carla S. S., Ferro, V., Gallart, Francesc, Giménez, R., Gimeno-García, Eugenia, Gómez Calero, José Alfonso, Gómez-Gutiérrez, Anna I., Gómez Macpherson, H., González-Pelayo, Óscar, Hueso-González, P., Kairis, O., Karatzas, G. P., Klotz, S., Kosmas, C., Lana-Renault, Noemí, Lasanta Martínez, Teodoro, Latron, Jérôme, Lázaro, Roberto, Le Bissonnais, Y., Le Bouteiller, C., Licciardello, Feliciana, López-Tarazón, José A., Lucía, Ana, Marín, Cinta, Marqués, María José, Martínez-Fernández, Julián, Martínez-Mena García, M. Dolores, Martínez-Murillo, Juan F., Mateos, Luciano, Mathys, N., Merino-Martín, L., Moreno-de-las-Heras, Mariano, Moustakas, N., Nicolau, J. M., Novara, A., Pampalone, V., Raclot, Damien, Rodríguez-Blanco, M. Luz, Rodrigo-Comino, J., Romero-Díaz, A., Roose, E., Rubio, José Luis, Ruiz-Sinoga, J. D., Schnabel, Susanne, Senciales-González, J. M., Simonneaux, V., Solé-Benet, Albert, Taguas, E. V., Taboada-Castro, M. Mercedes, Taboada-Castro, M. Teresa, Todisco, F., Úbeda, Xavier, Varouchakis, E. A., Vericat, Damià, Wittenberg, L., Zabaleta, Ane, and Zorn, M.
Abstract: Soil degradation by water is a serious environmental problem worldwide, with specific climatic factors being the major causes. We investigated the relationships between synoptic atmospheric patterns (i.e. weather types, WTs) and runoff, erosion and sediment yield throughout the Mediterranean basin by analyzing a large database of natural rainfall events at 68 research sites in 9 countries. Principal Component Analysis (PCA) was used to identify spatial relationships of the different WTs including three hydro-sedimentary variables: rainfall, runoff, and sediment yield (SY, used to refer to both soil erosion measured at plot scale and sediment yield registered at catchment scale). The results indicated 4 spatial classes of rainfall and runoff: (a) northern sites dependent on North (N) and North West (NW) flows; (b) eastern sites dependent on E and NE flows; (c) southern sites dependent on S and SE flows; and, finally, (d) western sites dependent on W and SW flows. Conversely, three spatial classes are identified for SY characterized by: (a) N and NE flows in northern sites (b) E flows in eastern sites, and (c) Wand SW flows in western sites. Most of the rainfall, runoff and SY occurred during a small number of daily events, and just a few WTs accounted for large percentages of the total. Our results confirm that characterization by WT improves understanding of the general conditions under which runoff and SY occur, and provides useful information for understanding the spatial variability of runoff, and SY throughout the Mediterranean basin. The approach used here could be useful to aid of the design of regional water management and soil conservation measures.
Published: 2019

18. Rainfall-runoff relationship at different time scales in a mid-mountainous Mediterranean catchment

Author: Latron, J. [0000-0003-3253-6734], Fortesa, Josep, García-Comendador, Julián, Calsamiglia, Aleix, López-Tarazón, José A., Latron, Jérôme, Estrany, Joan, Latron, J. [0000-0003-3253-6734], Fortesa, Josep, García-Comendador, Julián, Calsamiglia, Aleix, López-Tarazón, José A., Latron, Jérôme, and Estrany, Joan
Abstract: (1) Mediterranean Ecogeomorphological and Hydrological Connectivity Research Team (http://medhycon.uib.cat), Department of Geography, University of the Balearic Islands, Carretera de Valldemossa Km 7.5 07122, Palma, Spain, (2) Institute of Agro-Environmental and Water Economy Research –INAGEA, University of the Balearic Islands, (3) Institute of Earth and Environmental Science, University of Potsdam, Karl-Liebknecht-Straße 24/25, 14476 Potsdam-Golm, Germany, (4) Institute of Environmental Assessment and Water Research (IDAEA), Spanish Research Council (CSIC), Jordi Girona 18, 08034 Barcelona, Spain Mediterranean catchments are characterized by high inter-intra annual precipitation variability and summer drought. The hydrological regime is characterized by ephemeral behaviour due to the direct rainfall-runoff relationship. Furthermore, extreme precipitations can generate an amount of rainfall higher than 200 mm in 24 hours with short response time. These events occurred normally under wet soil moisture conditions. The Mediterranean catchment morphology is a favourable factor for flash floods: short catchments with a high gradient slope. Others factor that condition the hydrological regime are the presence of limestone lithology and the impact of human activities on fluvial systems as geomorphological changes in channels and flood plains. The aim of this study is analyse the hydrological response of five hydrological years (2012-17) in an agricultural headwater catchment (i.e. < 4 km2) at different time scales. Rainfall-runoff relationship was carried out at annual and seasonal scale through the flow duration computation, the variability index, 30/70 ratio, quick flow response ratio and base flow index. The rainfall-runoff relationship at event scale was carried out through a Pearson correlation matrix using different variables extracted from the hyetograph and hydrograph. These variables were placed into two groups: a) antecedent conditions and b) event conditions. T
Published: 2018

19. Accuracy assessment of digital terrain model dataset sources for hydrogeomorphological modelling in small mediterranean catchments

Author: Agencia Estatal de Investigación (España), Ministerio de Economía, Industria y Competitividad (España), European Commission, Consejo Superior de Investigaciones Científicas (España), German Academic Exchange Service, Ministerio de Economía y Competitividad (España), Govern de les Illes Balears, Ministerio de Educación, Cultura y Deporte (España), Graf, Lukas, Moreno-de-las-Heras, Mariano, Ruiz, Maurici, Calsamiglia, Aleix, García-Comendador, Julián, Fortesa, Josep, López-Tarazón, José A., Estrany, Joan, Agencia Estatal de Investigación (España), Ministerio de Economía, Industria y Competitividad (España), European Commission, Consejo Superior de Investigaciones Científicas (España), German Academic Exchange Service, Ministerio de Economía y Competitividad (España), Govern de les Illes Balears, Ministerio de Educación, Cultura y Deporte (España), Graf, Lukas, Moreno-de-las-Heras, Mariano, Ruiz, Maurici, Calsamiglia, Aleix, García-Comendador, Julián, Fortesa, Josep, López-Tarazón, José A., and Estrany, Joan
Abstract: Digital terrain models (DTMs) are a fundamental source of information in Earth sciences. DTM-based studies, however, can contain remarkable biases if limitations and inaccuracies in these models are disregarded. In this work, four freely available datasets, including Shuttle Radar Topography Mission C-Band Synthetic Aperture Radar (SRTM C-SAR V3 DEM), Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Map (ASTER GDEM V2), and two nationwide airborne light detection and ranging (LiDAR)-derived DTMs (at 5-m and 1-m spatial resolution, respectively) were analysed in three geomorphologically contrasting, small (3–5 km2) catchments located in Mediterranean landscapes under intensive human influence (Mallorca Island, Spain). Vertical accuracy as well as the influence of each dataset’s characteristics on hydrological and geomorphological modelling applicability were assessed by using ground-truth data, classic geometric and morphometric parameters, and a recently proposed index of sediment connectivity. Overall vertical accuracy—expressed as the root mean squared error (RMSE) and normalised median deviation (NMAD)—revealed the highest accuracy for the 1-m (RMSE = 1.55 m; NMAD = 0.44 m) and 5-m LiDAR DTMs (RMSE = 1.73 m; NMAD = 0.84 m). Vertical accuracy of the SRTM data was lower (RMSE = 6.98 m; NMAD = 5.27 m), but considerably higher than for the ASTER data (RMSE = 16.10 m; NMAD = 11.23 m). All datasets were affected by systematic distortions. Propagation of these errors and coarse horizontal resolution caused negative impacts on flow routing, stream network, and catchment delineation, and to a lower extent, on the distribution of slope values. These limitations should be carefully considered when applying DTMs for catchment hydrogeomorphological modelling.
Published: 2018

20. Analysis of the spatial variability of the relationships between rainfall, runoff, erosion and sediment yield and synoptic atmospheric patterns around the Mediterranean basin

Author: Nadal-Romero, Estela [0000-0002-4651-7828], Gómez Calero, José Alfonso [0000-0002-3457-8420], González-Pelayo, Óscar [0000-0001-6193-4040], Moreno-de-las-Heras, Mariano [0000-0003-3366-5060], Peña-Angulo, Dhais, Nadal-Romero, Estela, González-Hidalgo, José C., Albaladejo, J., Andreu Pérez, V., Bagarello, V., Barhi, H., Batalla, Ramón J., Bernal, Susana, Bienes, Ramón, Campo, Julián, Campo-Bescós, M. A., Canatário-Duarte, Antonio, Cantón, Yolanda, Casalí, Javier, Castillo Sánchez, Victor Manuel, Cerdà, Artemi, Cheggour, A., Cid, Patricio, Cortesi, Nicola, Desir, Gloria, Díaz-Pereira, Elvira, Espigares, T., Estrany, Joan, Fernández-Raga, María, Ferreira, Carla S. S., Ferro, V., Gallart, Francesc, Giménez, R., Gimeno-García, Eugenia, Gómez Calero, José Alfonso, Gómez-Gutiérrez, Anna, Gómez Macpherson, H., González-Pelayo, Óscar, Hueso-González, P., Kairis, O., Karatzas, G. P., Keesstra, Saskia, Klotz, S., Kosmas, C., Lana-Renault, Noemí, Lasanta Martínez, Teodoro, Latron, Jérôme, Lázaro, Roberto, Le Bissonnais, Y., Le Bouteiller, C., Licciardello, Feliciana, López-Tarazón, José A., Lucía, Ana, Marín, Cinta, Marqués, María José, Martínez-Fernández, Julián, Martínez-Mena García, M. Dolores, Martínez-Murillo, Juan F., Mateos, Luciano, Mathys, N., Merino-Martín, L., Moreno-de-las-Heras, Mariano, Moustakas, N., Nicolau, J. M., Novara, A., Pampalone, V., Raclot, Damien, Rodríguez-Blanco, M. Luz, Rodrigo-Comino, J., Romero-Díaz, A., Roose, E., Rubio, José Luis, Ruiz-Sinoga, J. D., Schnabel, Susanne, Senciales-González, J. M., Simonneaux, V., Solé-Benet, Albert, Taguas, E. V., Taboada-Castro, M. Mercedes, Taboada-Castro, M. Teresa, Todisco, F., Úbeda, Xavier, Varouchakis, E. A., Wittenberg, L., Zabaleta, Ane, Zorn, M., Nadal-Romero, Estela [0000-0002-4651-7828], Gómez Calero, José Alfonso [0000-0002-3457-8420], González-Pelayo, Óscar [0000-0001-6193-4040], Moreno-de-las-Heras, Mariano [0000-0003-3366-5060], Peña-Angulo, Dhais, Nadal-Romero, Estela, González-Hidalgo, José C., Albaladejo, J., Andreu Pérez, V., Bagarello, V., Barhi, H., Batalla, Ramón J., Bernal, Susana, Bienes, Ramón, Campo, Julián, Campo-Bescós, M. A., Canatário-Duarte, Antonio, Cantón, Yolanda, Casalí, Javier, Castillo Sánchez, Victor Manuel, Cerdà, Artemi, Cheggour, A., Cid, Patricio, Cortesi, Nicola, Desir, Gloria, Díaz-Pereira, Elvira, Espigares, T., Estrany, Joan, Fernández-Raga, María, Ferreira, Carla S. S., Ferro, V., Gallart, Francesc, Giménez, R., Gimeno-García, Eugenia, Gómez Calero, José Alfonso, Gómez-Gutiérrez, Anna, Gómez Macpherson, H., González-Pelayo, Óscar, Hueso-González, P., Kairis, O., Karatzas, G. P., Keesstra, Saskia, Klotz, S., Kosmas, C., Lana-Renault, Noemí, Lasanta Martínez, Teodoro, Latron, Jérôme, Lázaro, Roberto, Le Bissonnais, Y., Le Bouteiller, C., Licciardello, Feliciana, López-Tarazón, José A., Lucía, Ana, Marín, Cinta, Marqués, María José, Martínez-Fernández, Julián, Martínez-Mena García, M. Dolores, Martínez-Murillo, Juan F., Mateos, Luciano, Mathys, N., Merino-Martín, L., Moreno-de-las-Heras, Mariano, Moustakas, N., Nicolau, J. M., Novara, A., Pampalone, V., Raclot, Damien, Rodríguez-Blanco, M. Luz, Rodrigo-Comino, J., Romero-Díaz, A., Roose, E., Rubio, José Luis, Ruiz-Sinoga, J. D., Schnabel, Susanne, Senciales-González, J. M., Simonneaux, V., Solé-Benet, Albert, Taguas, E. V., Taboada-Castro, M. Mercedes, Taboada-Castro, M. Teresa, Todisco, F., Úbeda, Xavier, Varouchakis, E. A., Wittenberg, L., Zabaleta, Ane, and Zorn, M.
Abstract: This contribution results from international collaborative efforts of different research groups around the Mediterranean basin focusing on soil conservation and water management. We will present the most complete database of runoff and soil erosion information and analyze the records from 68 locations, including more than 22458 detail events between 1985-2015. Soil conservation and water planning are two of the most challenging problems around the Mediterranean basin due to climate conditions and human activity. We believe that future advances on understanding soil degradation by water should be developed under global approaches. In this contribution, we will present an analysis of atmospheric conditions, expressed by weather types and the resulted rainfall, runoff, and erosion and sediment yield around the Mediterranean basin. The weather types compile daily information about the different air masses responsible for rainfall, runoff and eventually erosion and sediment yield, and their analyses let us know the synchrony of the response at different sites around the Mediterranean basin. The analyses of the global dataset display different spatial patterns for rainfall, runoff, and sediment yield, related to different atmospheric patterns. This research will be a valuable tool for understanding the evolution of these environmental variables, and therefore it will allow future planning to design regional water management and soil conservation measures
Published: 2018

21. An application of excess lead-210 analysis for the study of fine sediment connectivity in a Mediterranean mountain basin with badlands, the Vallcebre research catchments

Author: Moreno de las Heras, Mariano, Gallart, Francesc, Latron, Jérôme, Martínez-Carreras, Núria, Ferrer, Laura, Estrany, Joan, Moreno de las Heras, Mariano, Gallart, Francesc, Latron, Jérôme, Martínez-Carreras, Núria, Ferrer, Laura, and Estrany, Joan
Abstract: Analysis of sediment dynamics in Mediterranean environments is fundamental to basin management, particularly for mountain catchments with badlands, which affect water bodies and freshwater ecosystems. Connectivity has emerged in Environmental and Earth Sciences as an evolution of the sediment delivery concept, providing a useful framework for understanding how sediments are transferred between geomorphic zones of the catchment. This study explores the feasibility of excess lead-210 (210Pbex) to analyse sediment connectivity in a 4-km2 Mediterranean mountain basin with badlands (the Vallcebre research catchments, Eastern Pyrenees) by applying simple 210Pbex mass-balance models for hypothesis generation and experimental testing in the field. Badland surfaces in the basin are weathered by freezing during the winter and are further eroded in summer by the effect of highintensity storms. The eroded sediments may remain deposited within the catchment streams from months to years. Application of 210Pbex balance models in our basin proposes: (i) a saw-tooth seasonal pattern of badland surface 210Pbex activities (increasing from October to May, and depleted in summer) and (ii) a downstream increase in sediment activity due to fallout lead-210 accumulation in streambed sediment deposits. Both deposited and suspended sediments collected at the Vallcebre catchments showed, in general, low sediment 210Pbex concentrations, illustrating their fresh-rock origin at the badland sites, but also hampering the understanding of sediment 210Pbex patterns due to high measurement uncertainty (particularly for sediments with d50>20m) and to strong dependence on sediment sampling methodology. Suspended sediment 210Pbex activity reproduced the simulated seasonal activity patterns for the badland surfaces. Contrary to the in-stream transit increases of sediment 210Pbex activity that were predicted by our model simulations, fallout lead-210 concentrations in the suspended sediments decreased tow
Published: 2017

22. Ecogeomorfologia i drons com a eines de gestió dinàmica postincendi. El cas de la comarca del Pariatge, Mallorca

Author: Estrany, Joan, Calsamiglia, Aleix, Carriquí, Marc, García-Comendador, Julián, Nadal, Miquel, Forteza, Josep, Ruiz, Maurici, Alorda, Bartomeu, Gago, Jorge, Estrany, Joan, Calsamiglia, Aleix, Carriquí, Marc, García-Comendador, Julián, Nadal, Miquel, Forteza, Josep, Ruiz, Maurici, Alorda, Bartomeu, and Gago, Jorge
Abstract: Els incendis forestals són considerats un dels factors causals més importants en els processos de desertificació. Els territoris insulars com Mallorca són particularment sensibles als impactes antròpics, per la seva major fragilitat socioecològica. L’increment de superfície cremada a Mallorca d’ençà el 2011 esperoneja a vincular gestió forestal i recerca amb interdisciplinarietat i avenços tecnològics. L’ecogeomorfologia permet investigar el paper dels processos geomorfològics en la recuperació de la vegetació. Endemés, la introducció dels vehicles aeris no tripulats com a instruments de teledetecció presenta noves oportunitats en el monitoratge de processos ambientals. Aquest article pretén dilucidar el potencial de l’ecogeomorfologia i els drons per aplicar una gestió postincendi més efectiva i dinàmica, integrant la capacitat de resiliència dels ecosistemes amb la connectivitat dels sediments per restaurar el paisatge.Paraules clau: gestió postincendi, connectivitat dels sediments, ecofisiologia vegetal, UAV, ecosistemes mediterranis., Ecogeomorphology and drones as dynamic tools for post-fire management. The experience in the Pariatge County, Mallorca Wildfires are one of the most significant driving factors in desertification processes. Furthermore, insular territories such Mallorca are more affected by human impacts due to their intrinsic socioecological fragility. The increase of burned surface area since 2011in Balearic Islands involves a challenge in which forest management and research through interdisciplinary and technological advances should be joined. Ecogeomorphology is an emergent discipline which allows investigating the role of geomorphic processes in the vegetation recovery. Additionally, the introduction of unmanned aerial vehicles as remotesensing tools offers new and exciting opportunities for monitoring environmental processes. This paper pretends to elucidate the potential of ecogeomorphology and drones to implement more effective and dynamic post-fire management integrating both the resilience capacity of ecosystems with sediment connectivity for landscape restoration.Keywords: post-fire management, sediment connectivity, vegetal ecophysiology, UAVs, Mediterranean ecosystems., Los incendios forestales son uno de los factores causales más importantes en los procesos de desertificación. Los territorios insulares como Mallorca son particularmente sensibles a los impactos antrópicos, a causa de su mayor fragilidad socioecológica. El incremento de superficie quemada en Mallorca desde el año 2011 incita vincular gestión forestal e investigación a través de interdisciplinariedad y avances tecnológicos. La ecogeomorfología permite investigar el papel de los procesos geomorfológicos en la recuperación de lavegetación. Además, la introducción de vehículos aéreos no tripulados como instrumentos de teledetección presenta nuevas oportunidades en la monitorización de procesos ambientales. Este artículo pretende dilucidar el potencial de la ecogeomorfología y de los drones para aplicar una gestión post-incendio más efectiva y dinámica, integrando la capacidad de resiliencia de los ecosistemas con la conectividad de los sedimentos para restaurar el paisaje.Palabras clave: gestión post-incendio, conectividad de sedimentos, ecofisiologíavegetal, UAVs, ecosistemas mediterráneos.
Published: 2016

23. Cançons acostumades dins la família des Molinet de Can Tiró – Inca

Author: Llabrés Estrany, Joan and Llabrés Estrany, Joan
Abstract: Mu mare, Joanaina Estrany Llabrés, així m’ho va contar i jo ho vaig escriure en els anys de 1953 a 1965. Aquest aplec de cançons i gloses cantades en el començament del segle XX fou en part el que la padrina vella, Joanaina Llabrés Alzina, i el seu espòs, Guiem Estrany Pujadas, cantaven amb les seves sis filles: Joanaina, Margalida, Paula, Aina, Maria i Francisca. El fill Jaume no cantava, era rellotger. Vull presentar aquest treball i dedicar-lo en record de mu mare, Joanaina, filla major des Molinet de Can Tiró, “flor petita de la pagesia gran”, com així m’agradava anomenar-la, de qui som darrer fill, en agraïment per haver-me donat la vida, amor sens límit, ensenyament, estimació pels nostres costums i creences, parlar en llenguatge formós mallorquí i haver-me recitat i cantat els més de quinze centenars de cançons que formen aquest aplec inquer, que ambdós sempre apreciàrem tant., My mother, Joanaina Estrany Llabrés, told me this, and I wrote it between 1953 and 1965.This set of songs and “gloses” sung in the beginnings of th XXth century were, partially, the songs that the grandmother Joanaina Llabrés Alzina and her husband, Guillem Estrany Pujadas, use to sing with their six daughters: Joanaina, Margalida, Paula, Aina, Maria and Francisca. Their son, Jaume, watchmaker, didn’t sung. I want to present his work and dedicate it to the memory of my mother, Joanaina, oldest daughter of “Es Molinet de Can Tiró, place that I rather call “Little flower of the great peasantry”. I, her youngest son, would like to thank her for having given birth to me, as well as love without limits, education, love for our traditions and beliefs, the mallorcan beautiful language, and for having sung to me more that fifteen hundreds songs from this collection, that both of us always appreciated.
Published: 2016
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24. Ecogeomorfologia i drons com a eines de gestió dinàmica postincendi. El cas de la comarca del Pariatge, Mallorca

Author: Estrany, Joan, Calsamiglia, Aleix, Carriquí, Marc, García-Comendador, Julián, Nadal, Miquel, Forteza, Josep, Ruiz, Maurici, Alorda, Bartomeu, Gago, Jorge, Estrany, Joan, Calsamiglia, Aleix, Carriquí, Marc, García-Comendador, Julián, Nadal, Miquel, Forteza, Josep, Ruiz, Maurici, Alorda, Bartomeu, and Gago, Jorge
Abstract: Els incendis forestals són considerats un dels factors causals més importants en els processos de desertificació. Els territoris insulars com Mallorca són particularment sensibles als impactes antròpics, per la seva major fragilitat socioecològica. L’increment de superfície cremada a Mallorca d’ençà el 2011 esperoneja a vincular gestió forestal i recerca amb interdisciplinarietat i avenços tecnològics. L’ecogeomorfologia permet investigar el paper dels processos geomorfològics en la recuperació de la vegetació. Endemés, la introducció dels vehicles aeris no tripulats com a instruments de teledetecció presenta noves oportunitats en el monitoratge de processos ambientals. Aquest article pretén dilucidar el potencial de l’ecogeomorfologia i els drons per aplicar una gestió postincendi més efectiva i dinàmica, integrant la capacitat de resiliència dels ecosistemes amb la connectivitat dels sediments per restaurar el paisatge.Paraules clau: gestió postincendi, connectivitat dels sediments, ecofisiologia vegetal, UAV, ecosistemes mediterranis., Ecogeomorphology and drones as dynamic tools for post-fire management. The experience in the Pariatge County, Mallorca Wildfires are one of the most significant driving factors in desertification processes. Furthermore, insular territories such Mallorca are more affected by human impacts due to their intrinsic socioecological fragility. The increase of burned surface area since 2011in Balearic Islands involves a challenge in which forest management and research through interdisciplinary and technological advances should be joined. Ecogeomorphology is an emergent discipline which allows investigating the role of geomorphic processes in the vegetation recovery. Additionally, the introduction of unmanned aerial vehicles as remotesensing tools offers new and exciting opportunities for monitoring environmental processes. This paper pretends to elucidate the potential of ecogeomorphology and drones to implement more effective and dynamic post-fire management integrating both the resilience capacity of ecosystems with sediment connectivity for landscape restoration.Keywords: post-fire management, sediment connectivity, vegetal ecophysiology, UAVs, Mediterranean ecosystems., Los incendios forestales son uno de los factores causales más importantes en los procesos de desertificación. Los territorios insulares como Mallorca son particularmente sensibles a los impactos antrópicos, a causa de su mayor fragilidad socioecológica. El incremento de superficie quemada en Mallorca desde el año 2011 incita vincular gestión forestal e investigación a través de interdisciplinariedad y avances tecnológicos. La ecogeomorfología permite investigar el papel de los procesos geomorfológicos en la recuperación de lavegetación. Además, la introducción de vehículos aéreos no tripulados como instrumentos de teledetección presenta nuevas oportunidades en la monitorización de procesos ambientales. Este artículo pretende dilucidar el potencial de la ecogeomorfología y de los drones para aplicar una gestión post-incendio más efectiva y dinámica, integrando la capacidad de resiliencia de los ecosistemas con la conectividad de los sedimentos para restaurar el paisaje.Palabras clave: gestión post-incendio, conectividad de sedimentos, ecofisiologíavegetal, UAVs, ecosistemas mediterráneos.
Published: 2016

25. Dinàmica de l’acumulació temporal de sediment fi al llit del torrent de na Borges (Mallorca)

Author: Estrany, Joan, Garcia, Cels, Estrany, Joan, and Garcia, Cels
Abstract: [CAT] Aquest article avalua la magnitud i variabilitat espaciotemporal de l’acumulació temporal de sediment fi al torrent de na Borges (319 km2), Mallorca, amb l’objectiu d’elucidar les causes dels problemes de sedimentació i contribuir a la construcció d’un balanç integrat de sediments. L’índex de la resuspensió de sediment fi a partir de l’agitació de l’aigua i el llit varià espacialment i temporalment, oscil·lant entre 0 i 13 kg m-2, amb una mitjana de 2,4 kg m-2, mentre que l’emmagatzematge total fou de 515,2 t i l’específic de 20,6 t km-1. Aquests resultats foren comparats amb les exportacions de sediment en suspensió al llarg del torrent, i va resultar que les dinàmiques d’acumulació prevalgueren sobre les d’exportació per mor de les pèrdues per transmissió i la baixa energia condicionada per l’escàs pendent. Tot en un sistema fluvial amb baixa competència de transport com és na Borges, un riu mediterrani temporal on predominen les aportacions d’aigües subterrànies i afectat pels sistemes tradicionals de conservació dels sòls que limiten la transferència de sediments., [ENG] This paper assesses the magnitude and spatial and temporal variability of fine-grained sediment storage in the main stem of the Na Borges River (319 km2) in Mallorca. The main aim is to elucidate the causes of sedimentation problems and contribute to the establishment of an integrated sediment budget. Estimates of channel storage obtained from the water and bed agitation procedure varied both spatially and temporally, ranging between 0 and 13 kg m-2, with the average being 2.4 kg m-2. The total amount of sediment stored on the channel bed was 164 t, whilst the mean specific bed sediment storage was 6.5 t km-1. These results were compared with estimates of suspended sediment loads along the river and reflect a more active deposition than transport. The nature of streamaquifer interactions in a low-energy, temporary Mediterranean river affected by traditional soil conservation practices, together with flooding and wastewater discharges, define the varying spatial and temporal channel bed storage conditions along the watercourse.
Published: 2012

26. Dinàmica de l’acumulació temporal de sediment fi al llit del torrent de na Borges (Mallorca)

Author: Estrany, Joan, Garcia, Cels, Estrany, Joan, and Garcia, Cels
Abstract: [CAT] Aquest article avalua la magnitud i variabilitat espaciotemporal de l’acumulació temporal de sediment fi al torrent de na Borges (319 km2), Mallorca, amb l’objectiu d’elucidar les causes dels problemes de sedimentació i contribuir a la construcció d’un balanç integrat de sediments. L’índex de la resuspensió de sediment fi a partir de l’agitació de l’aigua i el llit varià espacialment i temporalment, oscil·lant entre 0 i 13 kg m-2, amb una mitjana de 2,4 kg m-2, mentre que l’emmagatzematge total fou de 515,2 t i l’específic de 20,6 t km-1. Aquests resultats foren comparats amb les exportacions de sediment en suspensió al llarg del torrent, i va resultar que les dinàmiques d’acumulació prevalgueren sobre les d’exportació per mor de les pèrdues per transmissió i la baixa energia condicionada per l’escàs pendent. Tot en un sistema fluvial amb baixa competència de transport com és na Borges, un riu mediterrani temporal on predominen les aportacions d’aigües subterrànies i afectat pels sistemes tradicionals de conservació dels sòls que limiten la transferència de sediments., [ENG] This paper assesses the magnitude and spatial and temporal variability of fine-grained sediment storage in the main stem of the Na Borges River (319 km2) in Mallorca. The main aim is to elucidate the causes of sedimentation problems and contribute to the establishment of an integrated sediment budget. Estimates of channel storage obtained from the water and bed agitation procedure varied both spatially and temporally, ranging between 0 and 13 kg m-2, with the average being 2.4 kg m-2. The total amount of sediment stored on the channel bed was 164 t, whilst the mean specific bed sediment storage was 6.5 t km-1. These results were compared with estimates of suspended sediment loads along the river and reflect a more active deposition than transport. The nature of streamaquifer interactions in a low-energy, temporary Mediterranean river affected by traditional soil conservation practices, together with flooding and wastewater discharges, define the varying spatial and temporal channel bed storage conditions along the watercourse.
Published: 2012