12 results on '"natural beach"'
Search Results
2. Analysis of Blue Flag Beaches Compared with Natural Beaches in the Balearic Islands and Canary Islands, Spain
- Author
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Roig-Munar, Francesc Xavier, Fraile-Jurado, Pablo, Peña-Alonso, Carolina, Finkl, Charles W., Series editor, Botero, Camilo M., editor, and Cervantes, Omar, editor
- Published
- 2018
- Full Text
- View/download PDF
3. natural beach
- Author
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Herrmann, Helmut and Bucksch, Herbert
- Published
- 2014
- Full Text
- View/download PDF
4. Coastal Vulnerability and Mitigation Strategies. From Monitoring to Applied Research.
- Author
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Vicinanza, Diego, Contestabile, Pasquale, and Vicinanza, Diego
- Subjects
Research & information: general ,3S tourism ,ADCP ,Abu Dhabi ,Andalusia coast ,BERM-N ,Bagnoli ,Bagnoli-Coroglio Bay ,Baltic coast ,Bayesian belief network ,FORM ,GPS wave buoy ,GSb model ,Greece ,Gulf of Mexico ,Holland coast ,JarKus data ,MIKE modelling ,Mar Menor ,Mediterranean Sea ,Mediterranean coasts ,Mekong Delta ,Morison and transverse equations ,Naples ,North Atlantic Spanish coasts ,Reef Balls™ ,Shore Protection Manual ,Southern Baltic coast ,TELEMAC ,UAV flights ,Unmanned Aerial Vehicles ,Veneto coast ,Yucatan peninsula ,aeolian processes ,arsenic ,automatic alignment ,beach drainage system ,beach economy ,beach morphodynamics ,beach nourishment ,beach resilience ,beach resistance ,beach surveys ,bending elastic modulus ,benthic macrophytes ,brackish lagoon types ,climate change ,climate changes ,coastal Andhra Pradesh ,coastal armouring ,coastal defense ,coastal ecosystem ,coastal erosion ,coastal management ,coastal monitoring ,coastal morphodynamic ,coastal morphodynamics ,coastal plan ,coastal region ,coastal state indicators ,coastal urbanization impact ,coastal vulnerability ,coastal vulnerability index ,combination waves ,cross-shore sediment transport ,directional wave spectra drifter (DWSD) ,disasters ,drag coefficients ,dune foot ,earthquake ,eco-defense ,eigen analysis ,eigenmode ,energy flux ,erosion, coastal flooding ,experimental tests ,extreme events ,flood attenuation ,flooded area ,flooding ,force sensors ,gently sloping revetment ,groins ,groundwater ,heavy metals contamination ,historical cartography ,horizontal cylinders ,hydrocarbons ,hydrodynamic coefficients ,hydrodynamic loads ,hydrometeorological conditions ,littoral cell ,long-term GIS analysis ,low frequency ,mangroves ,marine infrastructures impact ,marine inundation ,marine pollution ,mitigation strategies guidelines ,momentary coastline ,multiobjective optimization ,multivariate analysis ,natural beach ,natural defense ,natural hazards ,non-engineering measure ,onshore and offshore winds ,oscillatory flows ,probability ,pumping plant ,random waves ,reliability analysis ,resilience index ,risk maps ,salinity ,salinity intrusion ,sand nourishments ,sand-filled geosystems ,sea breezes ,sea level rise ,sea-level rise ,seaside impacts ,sediment budget ,shallow waters ,shore protection ,shore protection structures history ,small scale storm variations ,spectral analysis ,storm classification ,storm surges ,stormy year ,strategic retreat ,submerged breakwater ,succession ,synchronization ,temporary groin ,threshold values ,triple collocation ,tsunami ,tsunami-like solitary waves ,turbulence intensity ,univariate variables ,vegetation stiffness ,velocity distribution ,wave climate ,wave dissipation ,wave extreme events ,wave grouping ,wave hindcasting ,wave modeling ,wave numerical model ,waves action - Abstract
Summary: This book is a collection of all papers published in the Special Issue "Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research". The main focus is to provide the state-of-the-art and recent research updates on sustainable management strategies for protecting vulnerable coastal areas. Based on 28 contributions from authors representing 17 different countries (Australia, China, Ecuador, Germany, Greece, India, Italy, Mexico, The Netherlands, New Zealand, Poland, Spain, Sri Lanka, Taiwan, United Arab Emirates, UK, USA), an ensemble of interdisciplinary articles has been collected, emphasizing the importance of tackling technical and scientific problems at different scales and from different point of views.
5. Finite difference simulation of regular wave propagation over natural beach and composite barriers by Nwogu's extended Boussinesq equations.
- Author
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Ghadimi, Parviz and Lamouki, Mohammad Barzegar Paiin
- Subjects
FLUID mechanics ,BOUSSINESQ equations ,THEORY of wave motion ,FINITE difference method ,PERIODICALS - Abstract
Nwogu's extended Boussinesq equations are utilised to model waves in relatively deep to shallow water. These equations are solved using FDM technique and staggered-grid system. To solve the numerical model, fourth-order central difference scheme is used for first-order spatial derivatives and fourth-order Adams-Bashforth-Moulton predictor-corrector method is applied for time integration. The developed code is applied to model the interaction of regular waves and coastal barriers and breakwaters and five test cases are presented. Subsequently, interaction of regular wave and single and two consecutive trapezoidal barriers are simulated and effects of the distance between them are examined. Computed results of sloped beaches compared against other available data indicate good agreement. The Presented logical estimates for flow parameters can be used by marine engineers in hydrodynamic studies of natural coasts. For double breakwaters, it is concluded that effects of breakwaters is maximised, when distance between them is approximately equal to wave length. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
6. Microbiological and mycological beach sand quality in a volcanic environment: Madeira archipelago, Portugal.
- Author
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Pereira, Elisabete, Figueira, Celso, Aguiar, Nuno, Vasconcelos, Rita, Vasconcelos, Sílvia, Calado, Graça, Brandão, João, and Prada, Susana
- Subjects
- *
MICROBIAL ecology , *MICROBIOLOGY , *MYCOLOGY , *ENTEROCOCCUS , *ARCHIPELAGOES , *SEA birds - Abstract
Abstract: Madeira forms a mid-Atlantic volcanic archipelago, whose economy is largely dependent on tourism. There, one can encounter different types of sand beach: natural basaltic, natural calcareous and artificial calcareous. Microbiological and mycological quality of the sand was analyzed in two different years. Bacterial indicators were detected in higher number in 2010 (36.7% of the samples) than in 2011 (9.1%). Mycological indicators were detected in a similar percentage of samples in 2010 (68.3%) and 2011 (75%), even though the total number of colonies detected in 2010 was much higher (827 in 41 samples) than in 2011 (427 in 66 samples). Enterococci and potentially pathogenic and allergenic fungi (particularly Penicillium sp.) were the most common indicators detected in both years. Candida sp. yeast was also commonly detected in the samples. The analysis of the 3rd quartile and maximum numbers of all indicators in samples showed that artificial beaches tend to be more contaminated than the natural ones. However, a significant difference between the variables was lacking. More monitoring data (number of bathers, sea birds, radiation intensity variation, and a greater number of samples) should be collected in order to confirm if these differences are significant. In general, the sand quality in the archipelago's beaches was good. As the sand may be a vector of diseases, an international common set of indicators and values and a compatible methodologies for assessing sand contamination, should be defined, in order to provide the bather's with an indication of beach sand quality, rather than only the water. [Copyright &y& Elsevier]
- Published
- 2013
- Full Text
- View/download PDF
7. Coupled Wave-2D Hydrodynamics Modeling at the Reno River Mouth (Italy) under Climate Change Scenarios
- Author
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Davide Bonaldo, Sandro Carniel, Renata Archetti, Achilleas G. Samaras, Maria Gabriella Gaeta, and Gaeta, M.G., Bonaldo, D., Samaras, A.G., Carniel, S, Archetti, R.
- Subjects
climate changes ,sea-level rise ,TELEMAC ,natural beach ,flooded area ,lcsh:Hydraulic engineering ,010504 meteorology & atmospheric sciences ,0208 environmental biotechnology ,Geography, Planning and Development ,Climate change ,02 engineering and technology ,Aquatic Science ,01 natural sciences ,Biochemistry ,lcsh:Water supply for domestic and industrial purposes ,lcsh:TC1-978 ,River mouth ,Sea level ,Sirocco ,0105 earth and related environmental sciences ,Water Science and Technology ,geography ,lcsh:TD201-500 ,geography.geographical_feature_category ,Breaking wave ,Storm ,020801 environmental engineering ,climate change ,Climatology ,Environmental science ,Submarine pipeline - Abstract
This work presents the results of the numerical study implemented for the natural area of Lido di Spina, a touristic site along the Italian coast of the North Adriatic Sea, close to the mouth of River Reno. High-resolution simulations of nearshore dynamics are carried out under climate change conditions estimated for the site. The adopted modeling chain is based on the implementation of multiple-nested, open-source numerical models. More specifically, the coupled wave-2D hydrodynamics runs, using the open-source TELEMAC suite, are forced at the offshore boundary by waves resulting from the wave model (SWAN) simulations for the Adriatic Sea, and sea levels computed following a joint probability analysis approach. The system simulates presentday scenarios, as well as conditions reflecting the high IPCC greenhouse concentration trajectory named RCP8.5 under predicted climate changes. Selection of sea storms directed from SE (Sirocco events) and E-NE (Bora events) is performed together with Gumbel analysis, in order to define ordinary and extreme sea conditions. The numerical results are here presented in terms of local parameters such as wave breaking position, alongshore currents intensity and direction and flooded area, aiming to provide insights on how climate changes may impact hydrodynamics at a site scale. Although the wave energy intensity predicted for Sirocco events is expected to increase only slightly, modifications of the wave dynamics, current patterns, and inland flooding induced by climate changes are expected to be significant for extreme conditions, especially during Sirocco winds, with an increase in the maximum alongshore currents and in the inundated area compared to past conditions. © 2018 by the authors.
- Published
- 2018
- Full Text
- View/download PDF
8. CRAB PREDATION ON GREEN TURTLE (CHELONIA MYDAS) EGGS INCUBATED ON A NATURAL BEACH AND lN TURTLE HATCHERIES
- Author
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Ali, Ahmad and Ibrahim, Kamarruddin
- Subjects
ghost crab predation ,Chelonia mydas ,turtle hatchery ,Ocypode spp ,natural beach - Abstract
A study of crab predation on green turtle (Chelonia mydas) eggs was conducted on a natural beach of Mak Kepit, Pulau Redang and at turtle hatcheries in Geliga and Chendor during March - September 2002. The objectives were to quantify crab predation on turtle eggs on natural beach and hatcheries and to determine the effectiveness of plastic mesh fencing for preventing crab predation. A total of 658 nests comprise of those on natural beach (214), hatcheries (429) and experimental plot (15) were investigated. Result showed that mortality of green turtle eggs in the study area due to ghost crab predation is not an important threat as the magnitude of depredation was only 1.3% (range 0.4% - 2.7%). Two species of crabs, i.e., Ocypode ceratophthalmus and Ocypode kuhlii were recorded. The use of 0.5 cm meshed plastic netlon to fence surrounding nests down to 1m deep under sand surface was proven effective in preventing crabs from entering the nests in turtle hatcheries. This preventive method was recommended for adoption in the operation of turtle hatcheries, as it was effective and eco-friendly sound., Southeast Asia Sea Turtle Associative Research, Bangkok, Thailand, 16-19 December 2002
- Published
- 2002
9. Coupled Wave-2D Hydrodynamics Modeling at the Reno River Mouth (Italy) under Climate Change Scenarios.
- Author
-
Gaeta, Maria Gabriella, Bonaldo, Davide, Samaras, Achilleas G., Carniel, Sandro, and Archetti, Renata
- Subjects
HYDRODYNAMICS ,CLIMATE change ,SEA level ,OCEAN conditions (Weather) - Abstract
This work presents the results of the numerical study implemented for the natural area of Lido di Spina, a touristic site along the Italian coast of the North Adriatic Sea, close to the mouth of River Reno. High-resolution simulations of nearshore dynamics are carried out under climate change conditions estimated for the site. The adopted modeling chain is based on the implementation of multiple-nested, open-source numerical models. More specifically, the coupled wave-2D hydrodynamics runs, using the open-source TELEMAC suite, are forced at the offshore boundary by waves resulting from the wave model (SWAN) simulations for the Adriatic Sea, and sea levels computed following a joint probability analysis approach. The system simulates present-day scenarios, as well as conditions reflecting the high IPCC greenhouse concentration trajectory named RCP8.5 under predicted climate changes. Selection of sea storms directed from SE (Sirocco events) and E–NE (Bora events) is performed together with Gumbel analysis, in order to define ordinary and extreme sea conditions. The numerical results are here presented in terms of local parameters such as wave breaking position, alongshore currents intensity and direction and flooded area, aiming to provide insights on how climate changes may impact hydrodynamics at a site scale. Although the wave energy intensity predicted for Sirocco events is expected to increase only slightly, modifications of the wave dynamics, current patterns, and inland flooding induced by climate changes are expected to be significant for extreme conditions, especially during Sirocco winds, with an increase in the maximum alongshore currents and in the inundated area compared to past conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
10. Microbiological and mycological beach sand quality in a volcanic environment: Madeira archipelago, Portugal
- Author
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Rita Vasconcelos, Susana Prada, Nuno Aguiar, Sílvia Vasconcelos, Celso Figueira, Elisabete Alves Pereira, Graça Calado, and João Brandão
- Subjects
Veterinary medicine ,Environmental Engineering ,Natural Beach ,Beach Sand Quality ,Volcanic Eruptions ,Bathing Beaches ,Madeira ,Species Specificity ,Environmental monitoring ,Environmental Microbiology ,Mycological Contamination ,Environmental Chemistry ,Waste Management and Disposal ,Candida sp ,Weather ,Islands ,geography ,geography.geographical_feature_category ,Bacteria ,Portugal ,Ecology ,Bacteriological Contamination ,Significant difference ,Fungi ,Contamination ,Silicon Dioxide ,Pollution ,Volcano ,Archipelago ,Artificial Beach ,Calcareous ,Environmental Monitoring - Abstract
Madeira forms a mid-Atlantic volcanic archipelago, whose economy is largely dependent on tourism. There, one can encounter different types of sand beach: natural basaltic, natural calcareous and artificial calcareous. Microbiological and mycological quality of the sand was analyzed in two different years. Bacterial indicators were detected in higher number in 2010 (36.7% of the samples) than in 2011 (9.1%). Mycological indicators were detected in a similar percentage of samples in 2010 (68.3%) and 2011 (75%), even though the total number of colonies detected in 2010 was much higher (827 in 41 samples) than in 2011 (427 in 66 samples). Enterococci and potentially pathogenic and allergenic fungi (particularly Penicillium sp.) were the most common indicators detected in both years. Candida sp. yeast was also commonly detected in the samples. The analysis of the 3rd quartile and maximum numbers of all indicators in samples showed that artificial beaches tend to be more contaminated than the natural ones. However, a significant difference between the variables was lacking. More monitoring data (number of bathers, sea birds, radiation intensity variation, and a greater number of samples) should be collected in order to confirm if these differences are significant. In general, the sand quality in the archipelago's beaches was good. As the sand may be a vector of diseases, an international common set of indicators and values and a compatible methodologies for assessing sand contamination, should be defined, in order to provide the bather's with an indication of beach sand quality, rather than only the water. UE - Feder
- Published
- 2013
11. Wave Overtopping of a Barrier Beach
- Author
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NAVAL POSTGRADUATE SCHOOL MONTEREY CA, Laudier, Natalie A., NAVAL POSTGRADUATE SCHOOL MONTEREY CA, and Laudier, Natalie A.
- Abstract
An ephemeral river is a seasonal river that flows into the ocean, forming an inlet at certain times of the year, and the river is blocked by a barrier beach that usually forms a lagoon during the rest of the year. Ephemeral rivers are important for both military and civilian communities because these areas are susceptible to rapid, unpredictable flooding and beach breaching. Wave overtopping of barrier beaches is the first step to modeling beach breaching. Carmel River State Beach, in central California, acts a barrier beach for the Carmel River that flows into the Carmel Lagoon. Lagoon height changes were converted to volume changes by a stage-volume curve, then center differenced and averaged to provide total volume rates of change in the lagoon. The van der Meer and Janssen (VJ), European, and Hedges and Reis (HR) overtopping models were compared. The lagoon volume rate of change was compared to the predicted model rate of change for three different overtopping cases in 2006, 2008, and 2009. The models performed similarly with R2 values of 0.72-0.86 for narrow banded cases, with an average reduction factor of 0.74., The original document contains color images.
- Published
- 2009
12. Shoreline Responses to Hurricane Bonnie in Southwestern Louisiana
- Published
- 1989
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