1. Analysis of the influence of river discharge and wind on the Ebro turbid plume using MODIS-Aqua and MODIS-Terra data
- Author
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Moncho Gómez-Gesteira, Agustín Sánchez-Arcilla, M. deCastro, Renato Mendes, João Miguel Dias, D. Fernández-Nóvoa, Universitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental, and Universitat Politècnica de Catalunya. LIM/UPC - Laboratori d'Enginyeria Marítima
- Subjects
FLOW ,CIRCULATION ,Regional oceanic circulation ,IMAGERY ,Ebro River Delta (Spain) ,Aquatic Science ,Oceanography ,Atmospheric sciences ,Turbidity--Measurement ,Turbidity ,River mouth ,BUOYANT PLUME ,ESTUARY ,DAMS ,Ecology, Evolution, Behavior and Systematics ,Hydrology ,geography ,SEA ,Enginyeria civil::Geologia::Hidrologia [Àrees temàtiques de la UPC] ,geography.geographical_feature_category ,Discharge ,STORMWATER RUNOFF PLUMES ,SOUTHERN CALIFORNIA ,Ebre (Riu) ,Estuary ,Wind direction ,River discharge ,OCEAN COLOR ,Ebro River plume ,Plume ,MODIS ,Ocean color ,Wind effect ,Moderate-resolution imaging spectroradiometer ,Geology - Abstract
The turbid plume formed at many river mouths influences the adjacent coastal area because it transports sediments, nutrients, and pollutants.; The effects of the main forcings affecting the Ebro turbid plume were analyzed using data obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor onboard the Aqua and Terra satellites over the period 2003-2011. Composite images were obtained for days under certain river discharge conditions (different flow regimes) and different types of wind (alongshore and cross-shore winds) in order to obtain a representative plume pattern for each situation.; River discharge was the main driver of the Ebro River plume, followed by wind as the secondary force and regional oceanic circulation as the third one. Turbid plume extension increased monotonically with increased river discharge. Under high river discharge conditions (>355 m(3) s(-1)), wind distributed the plume in the dominant wind direction. Seaward winds (mistral) produced the largest extension of the plume (1893 km(2)), whereas southern alongshore winds produced the smallest one (1325 km(2)). Northern alongshore winds induced the highest mean turbid value of the plume, and southern alongshore winds induced the lowest one. Regardless of the wind condition, more than 70% of the plume extension was located south of the river mouth influenced by the regional oceanic circulation.
- Published
- 2015