CAJ | 학술논문

土地利用方式的变化是影响流域径流的重要因素，利用基于GIS技术的分布式水文模型SWAT ，以清漳河流域为研究对象，分析了不同土地利用方式对流域径流的影响。结果表明：率定后的模型适用于清漳河流域，模型率定期和验证期径流模拟的Nash-Sutcliffe效率系数分别为0．88和0．78，相关系数 R2分别为0．90和0．79，相对误差 Re分别为1．92％和－4．79％。不同的土地利用方式对流域径流有较大的影响作用，同草地和林地相比，城市用地与耕地均有增加地表径流的作用，但耕地相对于城市用地作用较弱；林地与草地均具有涵养水源的作用，但同林地相比，草地涵养水源的作用较差。为减少流域水土流失，应注意采取退耕还林还草，退草还林政策。
토지이용방식적변화시영향류역경류적중요인소，이용기우GIS기술적분포식수문모형SWAT ，이청장하류역위연구대상，분석료불동토지이용방식대류역경류적영향。결과표명：솔정후적모형괄용우청장하류역，모형솔정기화험증기경류모의적Nash-Sutcliffe효솔계수분별위0．88화0．78，상관계수 R2분별위0．90화0．79，상대오차 Re분별위1．92％화－4．79％。불동적토지이용방식대류역경류유교대적영향작용，동초지화임지상비，성시용지여경지균유증가지표경류적작용，단경지상대우성시용지작용교약；임지여초지균구유함양수원적작용，단동임지상비，초지함양수원적작용교차。위감소류역수토류실，응주의채취퇴경환림환초，퇴초환림정책。
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 .