Soil Water Assessment Tool (SWAT)

文章推薦指數： 80 %
投票人數：10人

The SWAT (Soil Water Assessment Tool) model, first released in the 1990's, is a small watershed to river basin-scale model that simulates the quality and ... Togglenavigation ModelPrimer SoilWaterAssessmentTool(SWAT) Purpose: Modelhydrologicprocessesandlanduseimpacts Developer: USDA,TexasA&MUniversity KeyFeatures: Modellandusechangeovertime;ArcGISinterface;modellargebasins LatestRelease: 2015,Version5.1.007 OSPlatform: Windows Cost: Free: RequiresArcGISandSpatialAnalyst FreeGIS:QGIS,Mapwindows RelatedSoftware: HEC-HMS,eWaterSource,SOBEK Website: SWAT Introduction TheSWAT(SoilWaterAssessmentTool)model,firstreleasedinthe1990’s,isasmallwatershedtoriver basin-scalemodelthatsimulatesthequalityandquantityofsurfaceandgroundwaterandpredictsthe environmentalimpactsoflanduse,landmanagementpractices,andclimatechange.Thewaterbalance,ortheflow ofwaterinandoutofahydrologicsystem,informsallprocessesintheSWATmodelbecauseofitsimpacton plantgrowth,sediment,nutrients,pesticidesandpathogens.Inordertomodelhydrologicprocesses,theSWAT modelfirstdividesbasinofinterestintosub-basins,andthenfurtherintohydrologicresponseunits(HRUs) basedonlanduse,managementandsoils.SWATestimatesrunoffforeachHRUseparately,andthenthetotal runofffortheentirebasin.TheSWATmodeliswidelyusedforhydrologicstudies,climatechangestudies,and waterqualitystudiesincludingnutrientloading,totaldailymaximumloads,pesticidesandbacteria.Key featuresoftheSWATmodelincludeitsabilitytoperformonmultipleGISplatforms,includingArcGIS, Mapwindows(MWSWAT),orQGIS(QSWAT).SWATcanalsobeintegratedwiththegroundwatermodelingsoftware MODFLOW. AdvantagesandLimitations Advantages Limitations Softwarecodeinpublicdomainandopensource Simulatespollutantloadinganddownstreamimpacts FreeversiondevelopedforMapwindowsandQGIS Extensivelyusedaroundtheworldwith700peerreviewarticles Trainingprovidedfromcoursesthroughuniversities Calibration,uncertaintyandsensitivityanalysisavailablethroughaseparateprogram(SWATCUP) Modelsagriculturalpractices Usermanualandtechnicalmanualsareavailable SpatialrepresentationofHRUsignorespollutantroutingwithinasub-watershed Modelformulasareempirical Notapplicablefor2Dor3Dhydraulicsapplications Limitedsnowmeltmodel Erosionandsedimenttransportislimited IllustrativeScreens SampleApplications Africa EastAsiaandthePacific Europe&CentralAsia LatinAmerica&theCaribbean MiddleEastandNorthAfrica SouthAsia Entro(WaterBalance) Mekong(Hydrologic) Nicaragua(Hydrology,WaterQuality) WorldBank-Allrightsreserved.

請為這篇文章評分？

延伸文章資訊