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Assessing sediment yield in Kalaya gauged watershed(northern morocco)using GIS and SWAT model

International Soil and Water Conservation Research 2016年第3期4卷 177-185页

作者： Hamza Briak Rachid Moussadek Khadija Aboumaria Rachid Mrabet Department of Earth Sciences Faculty of Sciences and Techniques(FST)Abdelmalek Essaadi UniversityPostal Box 41690000 TangierMorocco Department of Environment and Natural Resources Scientific DivisionNational Institute for Agricultural Research(INRA)Postal Box 41510000 RabatMorocco

An efficient design for erosion-control structures of any watershed in the world is entrusted with the delicate forecasting of sediment *** outlook yields are usually inferred by extrapolations from past *** runoff,as the transporting vehicle,is more closely correlated with sediment yields than any other ***,calibration as well as validation of process-based hydrological models are two major processes while estimating the sediment yield in *** actual survey is fulfilled with the aim of developing a trustworthy hydrologic model simulating stream flow discharge and sediment concentration with least uncertainty among the parameters picked out for calibration so as to verify the effect of the scenarios on the spatial distribution of sediment yield(sediments transported from sub-basins to the main channel during the step of time).Soil and Water Assessment Tool(SWAT,version 2012)model integrated with Geographic Information System(GIS,version 10.1)was used to simulate the stream flow and sediment concentration of Kalaya catchment situated in north of morocco for the period from 1971 to *** calibration and validation were performed for monthly time periods using Sequential Uncertainty Fitting 2(SUFI-2,version 2)within SWAT-CUP using 16 *** calibration outputs for monthly simulation for the period from 1976 to 1984 showed a good model performance for flow rates with NSE and PBIAS values of 0.76 and11.80,respectively;also a good model performance for sediment concentration with NSE and PBIAS values of 0.69 and 7.12,***,during validation period(1985–1993)for monthly time step,the NSE and PBIAS values were 0.67 and14.44,respectively for flow rates and these statistical values were 0.70 and 15.51,respectively for sediment concentration;which also means a good model performance for *** calibration,the inclusive effect of each parameter used was ranked using global sensitivity function

关键词： Erosion-control SWAT model Simulation Watershed northern morocco

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