Sensitivity analysis and calibration of the Modified Universal Soil Loss Equation(MUSLE) for the upper Malewa Catchment,Kenya

作     者：V.O.ODONGO J.O.ONYANDO B.M.MUTUA P.R.van OEL R.BECHT 

作者机构：University of TwenteFaculty of Geoinformation Science&Earth Observation(ITC) Egerton UniversityDepartment of Agricultural Engineering Wageningen UniversityWater Resources Management Group 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2013年第28卷第3期

页      面：368-383页

核心收录：

学科分类：082802[工学-农业水土工程] 0709[理学-地质学] 0819[工学-矿业工程] 0907[农学-林学] 08[工学] 09[农学] 090707[农学-水土保持与荒漠化防治] 0828[工学-农业工程] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 

基　　金：supported by a grant from Orskov Foundation,Macaulay Institute,United Kingdom the Netherlands Organisation for Scientific Research/Science for Global Development(NWO/WOTRO)Integrated Programmes for the funds that madepart of this study possible 

主　　题：MUSLE Sobol’sensitivity analysis Sediment yield Objective function Upper Malewa catchment 

摘      要：Simulation models are widely used for studying physical processes such as surface runoff,sediment transport and sediment yield in *** models need case-specific empirical data for parameterization before being applied especially in regions other than the ones they have been *** analysis is usually performed to determine the most influential factors of a model so that they can be prioritized for *** this way uncertainties in model outputs can be reduced *** study evaluates the commonly used modified universal soil loss equation(MUSLE) model used for sediment yield simulation for the case of the upper Malewa catchment in *** conceptual factors of the model are assessed relative to the hydrological factors in the ***,the sensitivity of the model to the choice of the objective function in calibration is *** Sobol’ sensitivity analysis method was used for evaluating the degree of sensitivity of the conceptual and hydrological factors for sediment yield simulations using the MUSLE ***-Sutcliffe Efficiency(NSE) and the modified Nash-Sutcliffe Efficiency(NSEm) are used to test the sensitivity of the model to the choice of the objective function and robustness of model performance with sediment data measured from upper Malewa catchment,*** results indicate that the conceptual factors are the most sensitive factors of the MUSLE model contributing about 66%of the variability in the output sediment *** variability of sediment yield output was also *** was attributed to interactions of input *** the upper Malewa catchment calibration of the MUSLE model indicates that the use of NSEm as an objective function provides stable results,which indicates that the model can satisfactorily be applied for sediment yield simulations.