SWAT Model of Runoff Research under Different Land Use and Land Cover Scenarios in Source Regions of Qingzhang River
Land use change is an important factor affecting runoff .By using GIS technology ,SWAT hydrologically distributed model is established to study the runoff response of the Qingzhang River under the scenarios of different land uses .T he results show that:after calibration ,the SWAT model suitable for Qingzhang River ,relative error of average annual discharges reach 1 .92% and 4 .79% ,Ens reaches 0 .88 and 0 .78 and R2 reaches 0 .90 and 0 .79 in the model calibration and verification period respectively .The different land use patterns have a great influence on runoff ,urban land and farmland increase surface runoff .But compared with the city ,farmland is weak .Woodland and grassland can reduce surface runoff and have water conservation function ,but the grass water conservation function is relatively poor .In order to reduce soil erosion ,we should return farmland to forest and grassland ,and re‐turn grass to forestry .
SWATland use and land cover changeQingzhang Riverrunoff
NETL
NSTL
万方数据
维普
