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8. Multiscale analysis of land use and land cover changes in Sri Lanka by remote sensing: the impacts of post-war infrastructure development in the last 20 Years (2002-2022)

Author

Andrieu, J., primary, Anupama, K., additional, Bautes, N., additional, Benabou, S., additional, Crook, O-J., additional, Gunasekara, V., additional, Jayasingam, T., additional, Jayathilaka, C., additional, Kodikara, K.A.S., additional, Lombard, F., additional, Madarasinghe, S.K., additional, Mathiventhan, T., additional, Muthusankar, G., additional, Premathilake, R., additional, Proisy, C., additional, Vanniasinkam, N., additional, Weeratunge, N., additional, Wickramaarachchi, N., additional, and Mathevet, R., additional

Published
2024
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14. Multiscale analysis of land use and land cover changes in Sri Lanka by remote sensing: the impacts of post-war infrastructure development in the last 20 Years (2002-2022).

Author

Andrieu, J., Anupama, K., Bautes, N., Benabou, S., Crook, O.-J., Gunasekera, V., Jayasingam, T., Jayathilaka, C., Kodikara, K. A. S., Lombard, F., Madarasinghe, S. K., Mathiventhan, T., Muthusankar, G., Premathilake, R., Proisy, C., Vanniasinkam, N., Weeratunge, N., Wickramaarachchi, N., and Mathevet, R.

Subjects
LAND cover, LAND use, REMOTE sensing, PROTECTED areas, FOREST density, COASTAL wetlands, WETLANDS, VEGETATION dynamics
Abstract

On a worldwide scale, land use and land cover changes (LULCC) is a major driver of global change and biodiversity erosion. This study aims to monitor at the scale of Sri Lanka, LULCC and vegetation dynamics, to identify the main changes and their drivers. It places emphasis on multiscale geospatial monitoring with satellite data but also mobilises the interdisciplinary knowledge of a research programme. First, national scale data allows the identification of major changes with the MODIS NDVI dataset using Mann-Kendall tests and time profile analysis. A second local scale was mobilised with a systematic diachronic visual interpretation of high-resolution images on Google Earth. The third step, a macro-regional scale focus on the South and East coasts, used LANDSAT imagery (Stacked K-means) verified by field studies (botanical and vegetation analysis, and interviews). About 92.5% of the island of Sri Lanka is stable or presents no significant trends in the vegetation cover. 5% show a significant positive (greening) trend between 2000 and 2020 around the Puttalam lagoon, west of the Samanalawewa Reservoir, in the Udawalawe National Park, east and north of Ella, and the Nuwaragala Forest Reserve. Only about 2.5% (165,000 ha) of the Island shows a negative significant trend mainly in the periphery of Colombo and Trincomalee. The first driver is a set of national planning decisions in terms of infrastructure development (including urban growth, housing programmes and agricultural fields, and the management of protected areas). The second driver comes under rural dynamics with increasing tree density in rural landscapes over the Uva Province. Infrastructure development initiated by the state, creates both underlying conditions for other activities and negative impacts on coastal ecosystems, such as degradation of wetlands (including protected areas). [ABSTRACT FROM AUTHOR]

Published
2023
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16. Coastal transformation and fisher wellbeing: Perspectives from Cuddalore District, Tamil Nadu, India

Author

Menon, Ajit, Bavinck, Maarten, Lawrence, Tara N., Nitya Rao, Muthusankar, G., Balasubramanian, D., Arunkumar, A.S., Bhagath Singh, A., Senthil Babu, D., and Bautes, Nicolas

Subjects
Coastal transformation, India, Fishers wellbeing, Aquaculture, Coromandel Coast, Geospatial changes, Tamil Nadu, Industrialisation, Cuddalore
Abstract

This report presents the results of a multi-disciplinary research project on the way the Indian coast is transforming and what consequences this has for the original fisher population. It takes Cuddalore District in Tamil Nadu as microcosm and discusses issues such as the industrialization of the coast, the changes affecting fisheries, land-use change, pollution and erosion. The final chapters consider the ways in which fisher wellbeing is impacted and how the fisher population – individually and collectively – responds. The authors argue that coastal transformation in India is many-sided and profound, and that the fishing population is bearing the brunt of modernization.

Published
2022
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18. Spatial and temporal changes of land use land cover distribution in selected sites of the southern coastal zone of Sri Lanka.

Author

Wijesundara, W. M. I. C., Gunathilaka, D. U. V., Madarasinghe, S. K., Andrieu, J., Muthusankar, G., Kankanamge, N. R., and Kodikara, K. A. S.

Subjects
LAND cover, COASTS, COASTAL zone management, LAND use, MANGROVE plants, REMOTE-sensing images, TREND analysis
Abstract

The southern coastal zone of Sri Lanka has been subjected to a variety of natural and anthropogenic influences over the past three decades. Understanding impacts of such influences on Land Use Land Cover (LULC) is vital for proper management of the coastal zone. This study, therefore, focused on mapping the change/s in the distribution of selected LULC in the selected sites, Bundala, Galle, Kalametiya, and Hambantota of the southern coastal zone, over last 24 years using satellite imagery. LULC maps of nine classes (mangrove, inland vegetation, marsh and grass, sand, bare land, built-up, cultivation, water, and unclassified) were created by employing an onscreen digitization technique achieving an accuracy of >70%. Trend analysis and two-sample proportion tests were used for statistical analyses, whereas geometric calculations were used for descriptive analyses. The results showed the highest overall change in LULC in Kalametiya, followed by Hambantota, Galle, and Bundala. The changes in the LULC classes are mainly attributed to the conversion of water to mangroves, marsh and grass areas in Kalametiya, water to built-up areas in Hambantota, cultivations to built-up areas in Galle, and marsh and grass areas to bare lands in Bundala. The causes of LULC changes were site specific. Trend analyses indicate the least LULC changes in Bundala possibly by 2025. The study highlights the significance of taking into account geographical dislocations when considering and anticipating the potential impacts of development projects over broader extents. [ABSTRACT FROM AUTHOR]

Published
2023
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21. Multi-Hazard Risk Assessment and Coastal Zone Management

Author

Muthusankar, G., Lakshumanan, C., Natesan, Usha, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Govindaraj, Saravanan

Subjects
Nagapattinam, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, India, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, CZM, Risk assessment
Abstract

International audience; Nagapattinam coast remained highly vulnerable to the vagaries of natural disasters for a long time. Keeping in view the demands of the society, this research work has been undertaken to assess the vulnerability of the Nagapattinam coastline, which extends from Porto Novo in the north to Adhiramapattinam in the south. CVI was computed and a comparison was made between classical and sigmoidal CVI. Static inundation analysis was done for the sea level rises by 1m, 2m, 3m, 4m and 5m, and the towns and villages expected to be severely affected were mapped. Aquifer Vulnerability Index was calculated using GALDIT model to study the vulnerability of Nagapattinam coastal aquifers to saline water intrusion. Finally, a multi-hazard zonation map was prepared to demarcate areas that are affected by all the identified hazards. Suitable management strategies are proposed to mitigate the risks.

Published
2021

23. Ground water vulnerability assessment of the South East India in the context of climate change stressors

Author

Muthusankar, G., Lakshumanan, Chokalingam, Roy, Priyadarsi D., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Bharathidasan University [Tiruchirappalli, India], Instituto de Geología, Universidad Nacional Autónoma de México, and Universidad Nacional Autónoma de México (UNAM)

Subjects
climate change, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, vulnerability, South East Inda, [SHS.GEO]Humanities and Social Sciences/Geography, sensitivity, adaptive capacity, ground water
Abstract

International audience; Climate change is affecting the agricultural sector since it is dependent on climatic conditions and water resource availability. The impacts tend to be greater in semi-arid and hard rock areas with few water resources. Vast area of the Tamil Nadu comes under Semi-arid and hard rock area. Due to prevailing semi-arid climate in these areas, both surface and ground water resources are very much limited due to several years of low and inconsistent rainfall. The agricultural activity in these areas have particularly became vulnerable to present day climate variability. In order to address these problems, the vulnerability profile is constructed by combining indices of “adaptive capacity” with “sensitivity indices”. The adaptive capacity was measured by biophysical indicators, socioeconomic parameters and technological factors. To measure sensitivity to future climate change IPCC-AR4 GCM climate model output obtained under IPCC SRES-A2 GHG emission scenario projected for the period 2040-2060 were used by downscaling for south India. Finally, the vulnerability of living population to future climate change was assessed for the entire semi - arid and hard rock area of Tamil Nadu state. The results show that six district are highly vulnerable to future climate change.

Published
2020

24. Evaluation of groundwater from drought-prone subtropical North America for irrigation and drinking quality assessments in the context of global warming

Author

Roy, Priyadarsi D., Sánchez-Zavala, José L., T, Subramani, Lakshumanan, Chokalingam, Zamora-Martínez, OLIVIA, Karunanidhi, D., Muthusankar, G., Instituto de Geología, Universidad Nacional Autónoma de México, Universidad Nacional Autónoma de México (UNAM), Anna University, Bharathidasan University [Tiruchirappalli, India], Sri Shakthi Institute of Engineering and Technology, Institut Français de Pondichéry (IFP), and Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Water quality, forcing, Holocene, Hydrochemistry, [SDE.MCG]Environmental Sciences/Global Changes, summer precipitation, [SHS.GEO]Humanities and Social Sciences/Geography, Stable isotope, Northeast Mexico, Mexico, palaeoclimate, Chihuahua Desert, geochemistry
Abstract

International audience; Southeastern part of the Chihuahua Desert has always been drought-prone as southerly migrated ITCZ and enhanced ENSO since the early Holocene reduced the moisture supply. This arid region was inhabited by nomadic hunters since 10,500 years BP and agricultural activities started around 1500 years BP. The climate models predict temperature increase of 1-2°C and precipitation reduction of 10-20% in this region over the next couple of decades. The impacts of water scarcity might reduce the crop yield by half by the end of this century, exacerbating the immigration from Mexico to the USA. Additionally, the over-exploitation of groundwater in last decades for irrigation has drastically reduced the water table causing burning of subsurface peat layers and subsidence. We investigated groundwater from three sedimentary basins (El Potosi, Sandia and Cieneguilla), used extensively for agricultural activities, in order to identify the recharge regions and determine their suitability for irrigation and drinking purposes, following the guidelines of WHO as well as using Na% and sodium adsorption ratio and permeability index. These groundwater (pH:7.2-8.2; TDS: 168-1660 mg/L) are of Ca-HCO3 and Ca-SO4 types, due to interaction of recharging water with limestone-gypsum bearing catchment lithologies. Distributions of stable isotopes with respect to the local meteoric water line identify the recharge regions at Mountains of different elevations located to the east (i.e. Sierra Madre Oriental). This recharge, however, does not reach aquifers in central part of these basins due to over-extraction in basin margins. Groundwater from El Potosi is the most suitable for irrigation and drinking. Samples from the Sandia and Cieneguilla are characterized by high to very-high salinity hazard and some of them are also doubtful-unsuitable for irrigation based on the Wilcox diagram. Some samples from El Potosi and Sandia, however, contain nitrate and fluoride more than permissible limits of human consumption.

Published
2020

25. Effects of Nitrate Contamination in Groundwater on Human Health: A case study of Tiruchirappalli City, Tamilnadu, India

Author

Lakshumanan, Chokalingam, Govindaraj, Gowtham, Muthusankar, G., Subramani, T., Roy, Priyadarsi D., Govindaraj, Saravanan, Bharathidasan University [Tiruchirappalli, India], Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Anna University, and Instituto de Geología, Universidad NacionalAutónoma de México

Subjects
Atomic Absorption Spectroscopy, [SHS.GEO] Humanities and Social Sciences/Geography, Human health, India - Tamil Nadu - Tiruchirappalli, [SHS.GEO]Humanities and Social Sciences/Geography, [SHS] Humanities and Social Sciences, Nitrate contamination, UV Spectrophotometer, Hazard Quotient, [SHS]Humanities and Social Sciences
Abstract

International audience; Increasing nitrate levels in groundwater have been a source of concern in the recent decades all over the world. The challenges due to the high level of nitrate in water have also receiving more attentions due to the impact of nitrate over health related issues. This study provides the information on the occurrence of nitrate contamination in groundwater in corporation of Tiruchirappalli, Tamilnadu. Moreover, it also gives the insights about the sources and negative effects of nitrate contamination. A total number of 24 groundwater samples have been collected from bore well at depth from 15 to 45 meter in a distributed pattern. An assessment of the level of nitrate contamination in the groundwater samples was determined using UV Spectrophotometer. The nitrate concentration ranges between 1.4 to 104 mg/l. A risk assessment over human health due to nitrate contamination was done using Hazard Quotient (HQ). The spatial analysis of groundwater trace elements was performed by Atomic Absorption Spectroscopy (AAS) combined with geostatistical modeling. The results indicate that, the consumers residing in eastern part of the study area are more exposed to current nitrate concentration. It is identified that improper sewage system and use of nitrate enriched fertilizers are the main source of nitrate in the study area. Hence, it is anticipated that outcomes of this study will provide insights for decision makers taking adaptive measures for groundwater Nitrate and trace element monitoring in Tiruchirappalli district.

Published
2020

26. Impacts of Climate Change and Anthropogenic Actvities on Groundwater Quality in Coastal Aquifers

Author

Muthusankar, G., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), and Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Coastal aquifers, [SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, Ground water, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology, Climate change, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2020

27. Mapping Spatial Changes in the Pichavaram mangrove from 2003 Onwards Using Very High Resolution Images, Tamil nadu Coast, India

Author

Ghosh, Shuvankar, Proisy, Christophe, Muthusankar, G., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), and Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud])

Subjects
[SDE.BE]Environmental Sciences/Biodiversity and Ecology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

28. On the urgent vulnerability assessment of the Coromandel coast of India threatened by increasing and combined environmental and human pressures

Author

Muthusankar, G., Proisy, Christophe, Ghosh, Shuvankar, Mathevet, Raphael, Natesan, Balachandran, Lakshumanan, C., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Bharathidasan University [Tiruchirappalli, India], and Govindaraj, Saravanan

Subjects
Erosion, Coastal vulnerability, [SDE.ES] Environmental Sciences/Environmental and Society, Remote sensing, Land use - land cover change, [SDE.ES]Environmental Sciences/Environmental and Society, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

29. Mapping and Assessing the Land Cover and Land Use of a fragile Coastal Landscape, Cuddalore District, Tamil Nadu, South India

Author

M, Anbarashan, Balachandran, N., Mathevet, Raphael, Muthusankar, G, S, Ghosh, Bautès, N., Proisy, Christophe, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie - UFR de Sciences Économiques, Gestion, Géographie et Aménagement des Territoires (UNICAEN UFR SEGGAT), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), National Centre for Coastal Research (NCCR), National Institute of Ocean Technology (NIOT), and Research and Information System for Developing Countries (RIS)

Subjects
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Abstract

International audience

Published
2019

30. Assessment of aquifer vulnerability and mapping of saline water intrusion in the Coastal aquifers of Cuddalore District

Author

Prabhakaran, M., T., Usha, Muthusankar, G., P.K., Bavinaya, Logesh, N., Lakshumanan, C., Pachaiyappa's College, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Bharathidasan University [Tiruchirappalli, India], The National Centre for Coastal Research (NCCR), National Institute of Ocean Technology (NIOT) & Research and Information System for Developing Countries (RIS), and Govindaraj, Saravanan

Subjects
[SDU.STU] Sciences of the Universe [physics]/Earth Sciences, India, Cuddalore district, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Aquifer, Saline water intrusion, ComputingMilieux_MISCELLANEOUS, Tamil Nadu
Abstract

International audience

Published
2019

31. Coastal vulnerability assessment for Tamil Nadu coast using Coastal Hazard Wheel

Author

P.K., BAVINAYA, Prabhakaran, M., LOGESH, N., Lakshumanan, C., Muthusankar, G., M, IYYAPPAN, VIVEK, G., KARTHIKAA, R., DASH, S. K., Usha, T., Bharathidasan University [Tiruchirappalli, India], Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Govindaraj, Saravanan

Subjects
[SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, [SDU.STU.OC] Sciences of the Universe [physics]/Earth Sciences/Oceanography, ComputingMilieux_MISCELLANEOUS, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Abstract

International audience

Published
2019

32. Looking for Integrated Conservation and Development of the Coramandel Coastal Wetlands: The case Study of Kaluveli (Tamil Nadu, South India)

Author

Mathevet, Raphael, Desmots, Elea, M, Anbarashan, N, Balachandran, Muthusankar, G., Proisy, Christophe, Ghosh, Shuvankar, Bautès, Nicolas, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), and Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud])

Subjects
[SDE.BE]Environmental Sciences/Biodiversity and Ecology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

34. Fine-scale assessment of changes in zonations of species for the management of imperiled mangroves, Pichavaram, India

Author

Proisy, Christophe, Ghosh, Shuvankar, Muthusankar, G., Helfer, V., J., Carle, C., Hassenrück, R. A., James, Lakshumanan, C., R., Narendran, K., Kathiresan, T., Usha, P., Madeswaran, Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Leibniz Centre for Tropical Marine Research (ZMT), Department of Marine Science, Bharathidasan University, Bharathidasan University [Tiruchirappalli, India], Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, and National Centre for Coastal Research

Subjects
[SDV.EE]Life Sciences [q-bio]/Ecology, environment, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, India, [SDV.BID]Life Sciences [q-bio]/Biodiversity, Mangrove, Species richness
Abstract

International audience; Each mangrove region has a specific history which needs to be understood as it is a central component for adapting current conservation plans to changing coastal conditions induced by increasing natural or human pressures. As these latter impact the functioning, physiognomy and extent of mangroves, it is urgent to design and implement monitoring programs able to monitor changes in zonations of mangrove species (ZMS). Recent studies highlighted the combined potential of very high spatial resolution (VHSR) satellite images and robust field data to map such mangrove areas dominated by a few species.Here we examined the Pichavaram mangroves, southeast coast of India. The 1100-ha mangrove wetland area was, in 1987, declared to be a Forest Reserve by the Forest Department, Government of Tamil Nadu. Disturbances generated by the 2004-tsunami, decreasing freshwater, and increasing pollutants inflow, combine to modify the geochemistry of the whole region with a potential influence on the zonation of mangrove species. Afforestation programmes have been carried out since the 1980s using the fishbone canal-bank technique.We inventoried species and measured trunk diameters (DBH), tree heights within forest plots representative of a large range of planted and natural ZMS. Based on this ground expertise, we performed a spectral and textural analysis of five VHSR multispectral images acquired between 2003 and 2018 to generate ZMS maps on a scale of 1:2000. Our results indicate that mangrove cover is increasing while species richness decreases in favour of salt-tolerant species. Our analysis also highlights a shrunk in average tree crown size, suggesting alterations in species succession and plant growth capability. We thank the Tamil Nadu Forest Department for allowing us to undertake this study.

Published
2019

35. Combined impact effects of climate and land use changes on groundwater quality in coastal aquifers

Author

Muthusankar, G., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Sri Shakthi Institute of Engineering and Technology, and Govindaraj, Saravanan

Subjects
[SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

36. Sustainable Coastal Zone management

Author

Muthusankar, G., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Centre for Disaster Management and Coastal Research, Bharathidasan University and The Alliance of Mexican Indian Geoscientific Opportunities (AMIGOs) in association with Department of Management studies, Bharathidasan University Model College

Subjects
[SDE.MCG] Environmental Sciences/Global Changes, [SHS.ENVIR] Humanities and Social Sciences/Environmental studies, [SDE.MCG]Environmental Sciences/Global Changes, [SHS.ENVIR]Humanities and Social Sciences/Environmental studies, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

37. Coastal zone multi-hazard vulnerability assessment along the South-East coast of India

Author

Muthusankar, G., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), and Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

38. Assessment of Coastal environmental changes with reference to aquaculture development in part of Tamil Nadu Coast using Geospatial Technology

Author

P., Ramki, S., Sajmol, Muthusankar, G., Lakshumanan, C., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Bharathidasan University [Tiruchirappalli, India], and The National Centre for Coastal Research (NCCR), National Institute of Ocean Technology (NIOT) & Research and Information System for Developing Countries (RIS)

Subjects
[SDE] Environmental Sciences, [SDE]Environmental Sciences, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

39. Applications of Geospatial Technologies in Archaeological and Historical Research

Author

Muthusankar, G., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and The Tamil Nadu State Department of Archaeology

Subjects
[SHS.ARCHEO] Humanities and Social Sciences/Archaeology and Prehistory, [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SHS.HIST] Humanities and Social Sciences/History, [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SHS.HIST]Humanities and Social Sciences/History, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

40. Coastal ground water vulnerability assessment for the south east coast of India by using geospatial technology

Author

Muthusankar, G., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), The Department of Earth Science, School of Physical, Chemical and Applied Sciences, Pondicherry University, and Govindaraj, Saravanan

Subjects
Coastal ground warder, Geospatial technology, [SHS.ENVIR] Humanities and Social Sciences/Environmental studies, [SHS.ENVIR]Humanities and Social Sciences/Environmental studies, India, [INFO]Computer Science [cs], South east coast, [INFO] Computer Science [cs], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

41. Land–use change Cuddalore district viewed through maps

Author

Muthusankar, G., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Govindaraj, Saravanan

Subjects
[SHS.ENVIR] Humanities and Social Sciences/Environmental studies, [SHS.ENVIR]Humanities and Social Sciences/Environmental studies, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

42. Applications of Geospatial Technologies in Archaeological Research

Author

Muthusankar, G., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Postgraduate Institute of Archaeology, (University of Kelaniya), Bauddhaloka Mawatha

Subjects
[SHS.ARCHEO] Humanities and Social Sciences/Archaeology and Prehistory, [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, [INFO]Computer Science [cs], [INFO] Computer Science [cs], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

43. Climate change research (1991-2012): comparative scientometric study of Argentina, Brazil, China, India and Mexico

Author

Saravanan, G., Rajan, V.R., Prasad, S., and Muthusankar, G.

Subjects
Environment -- Research, Climatic changes -- Research, Market trend/market analysis, Library and information science
Abstract

This paper attempts to highlight quantitatively the growth and development of climate change literature in terms of publication output as per Web of Science® (1991-2012, September).The focus of this analysis is to study the literature on climate change published from five developing countries namely Argentina, Brazil, China, India and Mexico. This paper is a comparative study on year wise, document type, most productive authors, subject wise, journal wise, institution wise, and language wise distributions. 7065 records have been retrieved for climate change for the studies countries. Country-wise climate change records and most prolific authors for the five countries have been identified. Authorship and collaboration trend was towards multi-authored papers. Institution-wise climate change records for these countries have also been generated. The topper here is Chinese Academy of Science, China (1843 records). We have grouped the listed publications from Web of Science® under 'climate change' into six broad subjects among which 'Geosciences (multidisciplinary)' has recorded maximum publications (22.4%) followed by 'Environmental Sciences' (21.6%) while 'Meteorology and atmospheric sciences' has recorded the least (9.3%). English language occupies the first place with 6882 out of 7065 records for the studied countries. KEYWORD: Climate change literature, Scientometric analysis, Developing countries, Argentina, Brazil, China, India, Mexico, 1. INTRODUCTION Climate is a component of the natural environment within which and against whose bounds human civilization has developed and prospered [1]. Climate change is one of the most [...]

Published
2014

44. Potential and limists of satellite-derived digital surface model data for assessing flood risks in Southeast Coast of India

Author

Muthusankar, G., Proisy, Christophe, Ricout, Anaïs, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Asian Association on Remote Sensing, Indian Society of Remote Sensing, Indian Society of Geomatics, and Indian Space Research Organisation

Subjects
Satellite remote sensing, environmental risk, coastal flooding, digital surface model, [SDE.ES]Environmental Sciences/Environmental and Society, Tamil Nadu
Abstract

International audience; Flood risk assessment in low-lying coastal areas requires efficient spatial observations of land elevation for theimplementation of protection, evacuation and safeguard plans of people and assets. Here we evaluated the potentialof Digital Surface Model (DSM) derived from satellite observations to map flood prone areas with the objective ofearly warning on flood risk in the Cuddalore and Pondicherry region, southeast coast of India. Coastal zonemanagement of this 100 km long coast is particularly challenging. Indeed, the whole region experiences at leasttwo cyclonic storms accompanied with storm surge, heavy rains, flooding and beach erosion every year; the havocswreaked by the 2004 tsunami, flash floods of 2005 and 2015, and the Thane cyclone in 2011 are still closememories. We analyzed Sentinel-1 Synthetic Aperture Radar (SAR) and ALOS World 3D DSM satellite data, andGoogle Earth images. All these data are freely available and we compared them to the population census dataacquired in 2011. Using Sentinel-1 SAR images, we discriminated flooded from non-flooded areas before comparingmaps of low-lying areas derived from ALOS DSM data. The results suggest a good agreement between real floodedareas and low-lying areas. However, the micro-topography reflecting channels and drainage systems could not becaptured with important issue for delineating areas with high risks of flooding. We explained that spatial resolutionof about 2 m in X, Y and 10 cm in Z directions are necessary for identifying areas with high risk of flooding asdemonstrated in many countries of the world. It is time to rethink national Indian spatial policy about high-resolutionimages in order to prepare safety plans of the property and the lives of populations of Tamil Nadu coasts.

Published
2017

45. Vulnerability assessment of climate change on groundwater using Geospatial Technology

Author

Muthusankar, G., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Sri Shakthi Institute of Engineering and Technology, and Govindaraj, Saravanan

Subjects
[SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, Vulnerability assessment, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Geospatial Technology, Climate change, [SDE.ES] Environmental Sciences/Environmental and Society, Groundwater, [SDE.ES]Environmental Sciences/Environmental and Society, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

46. Dynamics of tree diversity in undisturbed Evergreen forest at Uppangala, Central Western Ghats

Author

Ayyappan N, Ramesh, B. R., Soupramanien Aravajy, Ramalingam, S. R., Barathan, N., Selvaraj Jeyakumar, Muthusankar, G., Balachandran, N., Cécile Antin, Jimmy Le Bec, Jean-Pierre Pascal, Raphaël Pélissier, Francois Munoz, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Pondicherry University, and Krishnan P.N.

Subjects
[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry, Trees diversity, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, ComputingMilieux_MISCELLANEOUS, Western Ghats
Abstract

International audience

Published
2017

47. Remote Sensing and GIS Application in Coastal Zone Management

Author

Muthusankar, G., Govindaraj, Saravanan, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Department of Mining Engineering, Anna University

Subjects
[SDE.ES] Environmental Sciences/Environmental and Society, [SDE.ES]Environmental Sciences/Environmental and Society, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

48. Assessment of Deforestation in Southern Peninsular India

Author

Muthusankar, G., C.V., John, A., Tanguy, Ramesh, B.R., Réjou-Méchain, M., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), and Govindaraj, Saravanan

Subjects
[SDE] Environmental Sciences, [SDE]Environmental Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

49. Help of Science for Water Front Project

Author

Muthusankar, G., Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), and Govindaraj, Saravanan

Subjects
[SHS] Humanities and Social Sciences, ComputingMilieux_MISCELLANEOUS, [SHS]Humanities and Social Sciences
Abstract

International audience

Published
2016

50. L’informalité politique en ville. 8 chercheurs et 9 villes face aux modes de gouvernement urbain

Author

Bautes, Nicolas, Muthusankar, G., Proisy, C., BALASUBRAMANIAN, D., Bhalla, R., Mathevet, R., Ricout, A., Babu, D. Senthil, Vasudevan, S., Inverses, Collectif, Morelle, Marie, Jacquot, Sébastien, Tadié, Jérôme, Bautès, Nicolas, Bénit-Gbaffou, Claire, Maccaglia, Fabrizio, Rivelois, Jean, Sierra, Alexis, Institut Français de Pondichéry (IFP), Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS), Espaces et Sociétés (ESO), Institut de Géographie et d'Aménagement (IGARUN), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST-Université d'Angers (UA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Le Mans Université (UM), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Sorbonne (UP4)-École pratique des hautes études (EPHE)-Institut de Recherche pour le Développement (IRD)-Université Panthéon-Sorbonne (UP1), Équipe interdisciplinaire de recherches sur le tourisme (EIREST), Université Panthéon-Sorbonne (UP1), Unite de recherche migrations et sociétés (URMIS), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Université Paris Diderot - Paris 7 (UPD7)-Institut de recherche pour le développement [IRD] : UR205-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Géographie Comparée des Suds et des Nords (GECKO), Université Paris Nanterre (UPN), CoST, Cités, Territoires, Environnement et Sociétés (CITERES), Université de Tours-Centre National de la Recherche Scientifique (CNRS)-Université de Tours-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes en Sciences Sociales sur les Mondes Africains, Américains et Asiatiques (CESSMA), Institut de Recherche pour le Développement (IRD)-Institut de Recherche pour le Développement (IRD [France-Nord]), Centre National de la Recherche Scientifique (CNRS)-Ministère de l'Europe et des Affaires étrangères (MEAE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Université Paris Diderot - Paris 7 (UPD7)-Institut de recherche pour le développement [IRD] : UR205-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Le Mans Université (UM)-Université d'Angers (UA)-AGROCAMPUS OUEST-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement (IGARUN), and Université de Nantes (UN)-Université de Nantes (UN)

Subjects
Urban space, Collective research approach, Démarche collective de recherche, [SHS.SOCIO]Humanities and Social Sciences/Sociology, Power, Espace urbain, Pouvoir, [SHS.GEO]Humanities and Social Sciences/Geography, Arrangement, [SHS.ANTHRO-SE]Humanities and Social Sciences/Social Anthropology and ethnology, Informalité politique, Political informality
Abstract

International audience; In 2010, a collective of 8 geographers and sociologists launched the research program “Informality, Power and the Other Side of Urban Spaces - Inverses”. This text is a description of the process and different stages followed by the research group, as well as the approaches used to develop a shared analytical framework, and the positioning of its thesis and findings in relation to contemporary questions on urban power. It furthermore presents how political informality has emerged as a key notion to understanding modes of urban government, taking into account the different forms of arrangement in presence in the cities studied.; En 2010, un collectif de 8 chercheurs, géographes et sociologue, lance le programme de recherche « Informalité, pouvoirs et envers des espaces urbains - Inverses ». Ce texte retrace le parcours de ce collectif, la manière dont il a construit une analyse commune et positionné sa problématique et ses recherches par rapport aux questionnements contemporains sur les pouvoirs urbains. Il propose de voir comment la notion d’informalité politique a émergé pour devenir une clef de lecture des modes de gouvernement urbain, partant de l’analyse de diverses formes d’arrangement à l’œuvre sur les terrains étudiés.

Published
2016

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