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20 st / March 2016 www.sea-technology.com was obtained from the European Space Agency, and it is a Shuttle Radar Topography Mission (SRTM) image with 1 arc-second spatial resolution (approximately 30 m). The land-use map was downloaded from the Coordination of Information on the Environment (CORINE) data set version 1.3 with 100-m resolution. The soil-type map was down- loaded from the Food and Agriculture Organization (FAO) database, version 3.6 with 5 arc-second spatial resolution (approximately 150 m), in Esri format to be used in ArcGIS, while the database with all the different parameters needed for the different layers of the different soils to be run in SWAT Torrential rainfall can lead to a num- ber of hazards, such as foods and relat- ed risks. In fact, in Spain, foods consti- tute the most dangerous natural disaster since they cause signifcant damages as well as human death. Numerous human interventions have altered the river sys- tem geomorphology. Persistence of sus- pended solids is evident after extreme food events, implying environmental and socioeconomic damages. There are more than 100 signifcant food risk areas in this watershed. Thanks to dams and reservoirs, foods have been drastically diminished. The fow that reaches the river is regulated by a dam at Alcala del Rio, built in 1930 110 km upstream from the river. Guadalquivir Data Set The SWAT model was used as a catchment model to as- sess the regulation of the river. SWAT was chosen due to the robustness of the program, its open-source FORTRAN code, ease of changing input data, effcient management of output information, high speed of computation, and broad number of physical processes and interactions considered in the model. A digital elevation model (DEM), land-use map, soil type, slope, weather data and river fow are necessary to set up the SWAT model for the Guadalquivir River. The DEM fle Simulated (red line) and observed (blue line) Guadalquivir River fow discharge for calibration (A) and validation (B). The Global Leader In Subsea Propulsion & Motion Control For Over 30 Years BRUSHLESS DC THRUSTERS • Customized to your specifcations • Self-contained electronics - 24 to 330VDC • Brushless DC motors for maximum performance & longevity • Aluminum, stainless steel or titanium construction options available • Magnetically coupled propellers eliminate shaft seals for greater reliability T H E L E A D E R I N S U B S E A P R O P U L S I O N ™ Model 2020 115kgf forward 73 kgf reverse thrust www.tecnadyne.com BUILT IN THE USA