Next Article in Journal
Integrating GIS-Based MCDA Techniques and the SCS-CN Method for Identifying Potential Zones for Rainwater Harvesting in a Semi-Arid Area
Previous Article in Journal
Application of Flow Velocity and Direction Measurement System in Slope Stability Analysis
Previous Article in Special Issue
A Case Study of the Effects of Management Interventions on the Phosphorus Dynamics at a Coastal, Eutrophic, Caribbean lagoon (Laguna Cartagena, Puerto Rico)
Open AccessArticle

Short-Term Response of Chlorophyll a Concentration Due to Intense Wind and Freshwater Peak Episodes in Estuaries: The Case of Fangar Bay (Ebro Delta)

1
Maritime Engineering Laboratory (LIM), Catalonia University of Technology (UPC), 08034 Barcelona, Spain
2
Institute of Agriculture and Food Research and Technology (IRTA), Crtra. Poble Nou, s/n Km 5,5, 43540 Sant Carles de la Rapita, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Miguel Ortega-Sánchez
Water 2021, 13(5), 701; https://doi.org/10.3390/w13050701
Received: 31 December 2020 / Revised: 27 February 2021 / Accepted: 28 February 2021 / Published: 5 March 2021
(This article belongs to the Special Issue Dynamics and Biogeochemical Flows in Estuarine and Nearshore Systems)
Estuaries and coastal bays are areas of large spatio-temporal variability in physical and biological variables due to environmental factors such as local wind, light availability, freshwater inputs or tides. This study focuses on the effect of strong wind events and freshwater peaks on short-term chlorophyll a (Chl a) concentration distribution in the small-scale and microtidal, Fangar Bay (Ebro Delta, northwestern Mediterranean). The hydrodynamics of this bay are primarily driven by local wind episodes modulated by stratification in the water column. Results based on field-campaign observations and Sentinel-2 images revealed that intense wind episodes from both NW (offshore) and NE-E (onshore) caused an increase in the concentration of surface Chl a. The mechanisms responsible were horizontal mixing and the bottom resuspension (also linked to the breakage of the stratification) that presumably resuspended Chl a containing biomass (i.e., micropyhtobentos) and/or incorporated nutrients into the water column. On the other hand, sea-breeze was not capable of breaking up the stratification, so the chlorophyll a concentration did not change significantly during these episodes. It was concluded that the mixing produced by the strong winds favoured an accumulation of Chl a concentration, while the stratification that causes a positive estuarine circulation reduced this accumulation. However, the spatial-temporal variability of the Chl a concentration in small-scale estuaries and coastal bays is quite complex due to the many factors involved and deserve further intensive field campaigns and additional numerical modelling efforts. View Full-Text
Keywords: estuary; Fangar Bay; field measurements; chlorophyll a; physical processes; biological processes; wind; small-scale bay; microtidal bay; Sentinel-2 estuary; Fangar Bay; field measurements; chlorophyll a; physical processes; biological processes; wind; small-scale bay; microtidal bay; Sentinel-2
Show Figures

Figure 1

MDPI and ACS Style

F-Pedrera Balsells, M.; Grifoll, M.; Fernández-Tejedor, M.; Espino, M. Short-Term Response of Chlorophyll a Concentration Due to Intense Wind and Freshwater Peak Episodes in Estuaries: The Case of Fangar Bay (Ebro Delta). Water 2021, 13, 701. https://doi.org/10.3390/w13050701

AMA Style

F-Pedrera Balsells M, Grifoll M, Fernández-Tejedor M, Espino M. Short-Term Response of Chlorophyll a Concentration Due to Intense Wind and Freshwater Peak Episodes in Estuaries: The Case of Fangar Bay (Ebro Delta). Water. 2021; 13(5):701. https://doi.org/10.3390/w13050701

Chicago/Turabian Style

F-Pedrera Balsells, Marta; Grifoll, Manel; Fernández-Tejedor, Margarita; Espino, Manuel. 2021. "Short-Term Response of Chlorophyll a Concentration Due to Intense Wind and Freshwater Peak Episodes in Estuaries: The Case of Fangar Bay (Ebro Delta)" Water 13, no. 5: 701. https://doi.org/10.3390/w13050701

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop