A validation of WEPP water quality routines in uniform and nonuniform agricultural hillslopes

作     者：Ryan P.McGehee Dennis C.Flanagan Bernard A.Engel John E.Gilley Ryan P.McGehee;Dennis C.Flanagan;Bernard A.Engel;John E.Gilley

作者机构：Department of Agricultural and Biosystems EngineeringIowa State University4352 Elings Hall605 Bissel RoadAmesIA50011USA USDA-Agricultural Research ServiceNational Soil Erosion Research Laboratory275 South Russell StreetWest LafayetteIN47907USA Department of Agricultural and Biological EngineeringPurdue University225 South University StreetWest LafayetteIN47907USA USDA-Agricultural Research ServiceAgroecosystem Management Research UnitRoom 238Chase HallUniversity of NebraskaLincolnNE68583USA 

出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)

年 卷 期：2024年第12卷第3期

页      面：487-505页

核心收录：

学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 0828[工学-农业工程] 08[工学] 09[农学] 0815[工学-水利工程] 

基　　金：Department of Agricultural and Biological Engineering at Purdue University USDA-ARS National Soil Erosion Research Laboratory 

主　　题：Water quality Nonpoint Validation Vegetative filter strip Best management practice WEPP 

摘      要：Current watershed-scale,nonpoint source pollution models do not represent the processes and impacts of agricultural best management practices on water quality with sufficient detail.A Water Erosion Pre-diction Project-Water Quality(WEPP-WQ)model was recently developed which is capable of simulating nonpoint source pollutant transport in nonuniform hillslope conditions such as those with ***,WEPP-WQ has not been validated for these conditions,and prior validation work only eval-uated calibrated performance rather than uncalibrated performance,with the latter being most relevant to model *** study evaluated uncalibrated and calibrated model performance in two plot-scale,artificial rainfall studies.179 observations were compared to corresponding WEPP-WQ simulations of runoff,sediment yield,and soluble and particulate nutrient forms for both nitrogen and *** validation results were mixed for the different field conditions,model configurations,and prediction ***-Sutcliffe Efficiencies for uncalibrated simulations of uniform conditions were generally greater than 0.6 except for soluble nitrogen predictions which were *** of nonuniform conditions were generally unsatisfactory except for runoff predictions which were quite good(NSE=0.78).Performance was improved substantially for almost all endpoints with *** exceptions to this occurred because the objective function for calibration was based on log-space differences so as to more equally-weight calibration of unsaturated conditions that tend to produce lesser runoff volumes and sediment *** results for both uniform and nonuniform condi-tions were generally satisfactory or good according to widely accepted model performance criteria.