Mediterranean Coastal Lagoons

Sanjaume, E.; Pardo-Pascual, Josep E.; Segura-Beltran, Francesca

doi:10.1007/978-3-319-93169-2_11

Cited by 4 publications

(7 citation statements)

References 18 publications

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“…Detrital aquifers are, in turn, fed by Mesozoic karstic aquifers in the near limestone reliefs. The wetlands are fed by groundwater discharges and depend on them to keep permanent surface of water [23]. Phreatic level is subject to seasonal variations but usually emerges very close to the surface.…”

Section: Study Areamentioning

confidence: 99%

Sentinel-2 Application to the Surface Characterization of Small Water Bodies in Wetlands

Pena-Regueiro

Sebastiá-Frasquet

Estornell

et al. 2020

Water

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Developing indicators to monitor environmental change in wetlands with the aid of Earth Observation Systems can help to obtain spatial data that is not feasible with in situ measures (e.g., flooding patterns). In this study, we aim to test Sentinel-2A/B images suitability for detecting small water bodies in wetlands characterized by high diversity of temporal and spatial flooding patterns using previously published indices. For this purpose, we used medium spatial resolution Sentinel-2A/B images of four representative coastal wetlands in the Valencia Region (East Spain, Mediterranean Sea), and on three different dates. To validate the results, 60 points (30 in water areas and 30 in land areas) were distributed randomly within a 20 m buffer around the border of each digitized water polygon for each date and wetland (600 in total). These polygons were mapped using as a base map orthophotos of high spatial resolution. In our study, the best performing index was the NDWI. Overall accuracy and Kappa index results were optimal for −0.30 threshold in all the studied wetlands and dates. The consistency in the results is key to provide a methodology to characterize water bodies in wetlands as generalizable as possible. Most studies developed in wetlands have focused on calculating global gain or loss of wetland area. However, inside of wetlands which hold protection figures, the main threat is not necessarily land use change, but rather water management strategies. Applying Sentinel-2A/B images to calculate the NDWI index and monitor flooded area changes will be key to analyse the consequence of these management actions.

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Section: Study Areamentioning

confidence: 99%

Sentinel-2 Application to the Surface Characterization of Small Water Bodies in Wetlands

Pena-Regueiro

Sebastiá-Frasquet

Estornell

et al. 2020

Water

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“…Los depósitos del Pleistoceno superior no aparecen en superficie y los materiales holocenos forman un pequeño cono en la desembocadura (Segura, et al,1993; Segura-Beltran y Pardo-Pascual, 2019). b) El prat de Cabanes o albufera de Torreblanca con una superficie de (1.061 ha), está cerrada por una restinga de 10,2 km, con una anchura media de 68 m y una pendiente antelitoral de 0,421 (Sanjaume et al, 2019). La restinga, formada por crestas de cantos, bermas y washover fans o abanicos de derrame, presenta tres sectores claramente diferenciados (Sanjaume et al, 1990;Carmona et al, 2014):…”

Section: áRea De Estudiounclassified

“…Sin embargo, no sucede lo mismo en los otros cuatro sectores (figura 6), y en aquellos con menor aprovisionamiento sedimentario (sectores 2 y 4), el impacto es todavía más exagerado, de manera que, en 2015, a pesar de la recuperación parcial, todavía no se había alcanzado la situación previa a los temporales. Otro aspecto interesante a resaltar es la coherencia entre la evolución observada y las señales morfológicas -escasa anchura de la restinga, existencia de turbas en el actual fondo sumergido de las playas-que evidencian que todo el sector ha sufrido una tendencia erosiva histórica (Sanjaume et al, 2019). La figura 6 muestra como entre 1956 y 1967 (el periodo con menor antropización directa) existen tendencias erosivas en los sectores 2, 3 y 5 pero son nítidamente acumulativas en los sectores 1 y 4.…”

Section: Los Cambios En El Sector 4 Yunclassified

“…Las causas antrópicas son muy variadas y se han incrementado con el paso del tiempo. La reducción del suministro de sedimentos (destrucción de dunas, reducción de aportes fluviales, retención en embalses) provoca procesos más o menos acelerados de erosión, mientras que la interrupción de su circulación (diques portuarios o espigones) produce erosión deriva abajo o sobreacumulación deriva arriba, tal como ocurre en buena parte del golfo de València (Pardo-Pascual, 1991;Sanjaume et al, 1996;; Pardo-Pascual y .…”

Section: Introductionunclassified

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Análisis de la evolución de la línea de costa entre Alcossebre y Orpesa a partir de fotografía aérea (1956-2015)

Pardo-Pascual

Moya

Beltrán

2019

CGUV

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Resumen El artículo presenta un análisis de la evolución de la línea de costa entre Alcossebre y Orpesa, a partir de fotografías aéreas y ortofotografías, entre 1956 y 2015. La digitialización de 12 líneas de costa ha permitido calcular los cambios netos y máximos, así como la tasa de cambio entre los diferentes años. Los resultados muestran una costa recesiva, con una gran variabilidad espacio-temporal. Conviven sectores con crecimiento sostenido provocado por la acción antrópica (deriva arriba de los espigones y regeneraciones de playa) o causas naturales (prominencias costeras), con otros claramente erosivos (deriva abajo de espigones). Además, el análisis de las isobatas del estrán sumergido, ha permitido explicar cómo la configuración de este espacio puede incrementar o frenar la erosión. Los temporales son los responsables de los grandes cambios, mientras que el déficit hidrosedimentario de los ríos a lo largo del siglo XX, subyace como causa última del comportamiento erosivo del área de estudio, tendencia que ya se manifestaba antes de la aparición de la acción antrópica. Así, la fotografía aérea, a pesar de su baja resolución temporal, compensa este déficit con la amplitud de sus series, lo que permite conocer el

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“…Moreover, as with many lakes, they are ephemeral formations as they are created in a few thousand years and also disappear either by siltation of the sediments that reach them or by disappearance of the sandy bar by marine erosion [3]. All the Mediterranean coastal lagoons are from the most recent Holocene period, and other sub-current lagoons are known, such as the Elx lagoon in Spain, located about 15 km from the coast, which is a remnant of the ancient Mediterranean coast prior to the Miocene saline crisis [4].…”

Section: Introductionmentioning

confidence: 99%

Mediterranean Coastal Lagoons Review: Sites to Visit before Disappearance

Soria

Pérez-González

Sòria‐Perpinyà

2022

JMSE

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Coastal lagoons are an established priority habitat in the European environment because of the biological communities that inhabit them. Their origin is related to the transport of sediments from a nearby river or the movement of sands by the marine currents that produce the closure of a gulf. Therefore, they are recent geological formations, which also disappear quickly if environmental conditions change. The 37 coastal lagoons with a surface area greater than 10 km2 located in the Mediterranean basin have been identified. Fishing has been the traditional use of these lagoons, in addition to their use as a navigation harbor when they are open to the sea. Pollution, quality problems and their consequences are the most studied topics in recent publications. Sentinel-2 images taken in the summer of 2020 have been used to study water transparency, suspended matter and chlorophyll a concentration. The result was that only six of them are in good ecological condition, but most of them are eutrophic due to the impacts on their environment and the inflow of poor quality water. The cultural values of these lagoons must also be protected and preserved.

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Mediterranean Coastal Lagoons

Cited by 4 publications

References 18 publications

Sentinel-2 Application to the Surface Characterization of Small Water Bodies in Wetlands

Sentinel-2 Application to the Surface Characterization of Small Water Bodies in Wetlands

Análisis de la evolución de la línea de costa entre Alcossebre y Orpesa a partir de fotografía aérea (1956-2015)

Mediterranean Coastal Lagoons Review: Sites to Visit before Disappearance

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