Wetland Planning: Current Problems and Environmental Management Proposals at Supra-Municipal Scale  (Spanish Mediterranean Coast)

Sebastiá-Frasquet, María-Teresa; Altur, Vicent; Sanchis, J.-A.

doi:10.3390/w6030620

Cited by 12 publications

(18 citation statements)

References 21 publications

(56 reference statements)

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“…It is included in both the Valencian Wetlands Inventory, and in the Spanish Wetlands, and at international level, is a Special Protection Areas (SPAs) for birds and Site of Community Importance (SCI). This coastal wetland is above a detrital aquifer, and its main freshwater input comes from groundwater discharge of the adjacent karstic aquifers and is separated from the sea by a sand bar [1]. The flooded surface is variable and depends on pluviometry among other factors [7].…”

Section: Study Areamentioning

confidence: 99%

“…Coastal wetlands are important ecosystems that are endangered because of intensive human pressure in these areas [1]. Wetlands provide a wide range of ecosystem services, particularly they are important providers of all water-related ecosystem services, among them their capacity to maintain and improve water quality, flood control, groundwater replenishment, shoreline stabilisation and storm protection and climate change mitigation and adaptation [2]- [4].…”

Section: Introductionmentioning

confidence: 99%

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Sentinel-2 Analysis of Flooded Areas: Applied Case Study – La Safor Wetland, Spain

Pena-Regueiro

Sebastiá-Frasquet

Aguilar-Maldonado

et al. 2020

WIT Transactions on Ecology and the Environment

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La Safor wetland is a representative coastal wetland in the Valencia Region (eastern Spain, Mediterranean Sea). This wetland is recognized at an international level as a Special Protection Area (SPAs) for birds and a Site of Community Importance (SCIs) (Habitats Directive, European Council Directive). The wetland is located on a detrital plain aquifer which in turn is fed by a karstic aquifer in the near limestone reliefs. The flooded surface is variable and depends on pluviometry among other factors. The objective of this study is to analyse the effects of the flooded surface on land uses by remote sensing and Airborne LiDAR data. Sentinel-2A images processed at level 1C were obtained from Copernicus. LiDAR data was used to detect the most vulnerable areas affected by floods. In the results, we analysed the impact of the maximum flooded surface on land uses. We propose several corrective actions on the drainage net based on our analysis. This methodology can be applied to other wetland areas of similar characteristics. The advantage is the high spatial resolution which makes the methodology suitable for small sized wetlands.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sentinel-2 Analysis of Flooded Areas: Applied Case Study – La Safor Wetland, Spain

Pena-Regueiro

Sebastiá-Frasquet

Aguilar-Maldonado

et al. 2020

WIT Transactions on Ecology and the Environment

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“…Given these characteristics, they exhibit complex spatial and temporal variability. They are usually part of wetland ecosystems and are among the most endangered ecosystems, especially in coastal areas, due to several anthropogenic threats [2]. These ecosystems are characterized by a high variability due to both natural intrinsic variability and anthropic pressures…”

Section: Introductionmentioning

confidence: 99%

Sentinel 2 Analysis of Turbidity Patterns in a Coastal Lagoon

et al. 2019

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Coastal lagoons are transitional ecosystems with complex spatial and temporal variability. Remote sensing tools are essential for monitoring and unveiling their variability. Turbidity is a water quality parameter used for studying eutrophication and sediment transport. The objective of this research is to analyze the monthly turbidity pattern in a shallow coastal lagoon along two years with different precipitation regimes. The selected study area is the Albufera de Valencia lagoon (Spain). For this purpose, we used Sentinel 2 images and in situ data from the monitoring program of the Environment General Subdivision of the regional government. We obtained Sentinel 2A and 2B images for years 2017 and 2018 and processed them with SNAP software. The results of the correlation analysis between satellite and in situ data, corroborate that the reflectance of band 5 (705 nm) is suitable for the analysis of turbidity patterns in shallow lagoons (average depth 1 m), such as the Albufera lagoon, even in eutrophic conditions. Turbidity patterns in the Albufera lagoon show a similar trend in wet and dry years, which is mainly linked to the irrigation practice of rice paddies. High turbidity periods are linked to higher water residence time and closed floodgates. However, precipitation and wind also play an important role in the spatial distribution of turbidity. During storm events, phytoplankton and sediments are discharged to the sea, if the floodgates remain open. Fortunately, the rice harvesting season, when the floodgates are open, coincides with the beginning of the rainy period. Nevertheless, this is a lucky coincidence. It is important to develop conscious management of floodgates, because having them closed during rain events can have several negative effects both for the lagoon and for the receiving coastal waters and ecosystem. Non-discharged solids may accumulate in the lagoon worsening the clogging problems, and the beaches next to the receiving coastal waters will not receive an important load of solids to nourish them.

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“…Wetlands are of vital importance because they provide a great variety of ecosystem services [1]. Among others, they are an important freshwater reserve and a source for groundwater recharge, and in coastal areas they provide defence against marine intrusion.…”

Section: Introductionmentioning

confidence: 99%

Turbidity Patterns in the Albufera Lake, Spain, and Their Relation to Irrigation Cycles

Sebastiá-Frasquet

Aguilar-Maldonado

Santamaría-del-Ángel

et al. 2019

WIT Transactions on Ecology and the Environment

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The Albufera Natural Park (Valencia, Spain) is one of the most representative coastal wetlands in the Mediterranean basin. It holds several protection designations at national and international level, such as Spanish Natural Park, Special Protection Areas (SPAs) for birds, Sites of Community Importance (SCIs) and Ramsar Site. Both the park and its main lake, Albufera's lake, face several environmental problems. One of them is reduced transparency and lake clogging. The lake is highly dependent on the rice cycle and on irrigation returns, mainly from the Acequia Real. In this study, we analyse the monthly transparency and turbidity patterns during year 2018, and we relate them to irrigation cycles. We used Sentinel 2A satellite images from the European Space Agency, which have an atmospheric correction. Remote sensing results were compared with in situ data from the monitoring program of the Environment General Subdivision of the regional government. This monitoring program samples five points on a monthly basis, and analyses Secchi disk depth, suspended solids and chlorophyll a. Our results show the temporal and spatial pattern of turbidity in the Albufera lake which offers relevant information for water resources management.

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Wetland Planning: Current Problems and Environmental Management Proposals at Supra-Municipal Scale (Spanish Mediterranean Coast)

Cited by 12 publications

References 21 publications

Sentinel-2 Analysis of Flooded Areas: Applied Case Study – La Safor Wetland, Spain

Sentinel-2 Analysis of Flooded Areas: Applied Case Study – La Safor Wetland, Spain

Sentinel 2 Analysis of Turbidity Patterns in a Coastal Lagoon

Turbidity Patterns in the Albufera Lake, Spain, and Their Relation to Irrigation Cycles

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