中文摘要：

DEM分辨率对小流域流域特征参数和径流模拟有影响.选择伊河流域中游的陆浑水库流域为研究区,模拟模型使用ArcView平台的集成系统AVSWAT2005,研究在不同DEM分辨率情况下径流模拟的变化.研究表明：DEM分辨率对流域特征产生很大影响,随着DEM分辨率的降低,坡度值变小,径流汇水长度变小,流域面积有变小的趋势.DEM分辨率进而影响了径流模拟的结果,随着DEM分辨率的降低径流量减少,月径流量峰值衰减,月径流量峰值谷值坦化.

英文摘要：

Abstract：DEM resolution has effect on the characteristic parameters of small basin and runoff simulation.Using the model of AVSWAT2005 integrated in ArcView platform the paper studies the diversification of runoff with different DEM resolution,in the Luhun reservoir basin in the middle of Yi river.The study shows that DEM resolution has a significant impact on basin characteristics.With DEM resolution decreasing,the value of slope changes to small,the length of runoff changes smaller and the drainage area changes smaller.The DEM resolution thereby affects the results of the runoff simulation.With DEM resolution decreasing,the volume of runoff reduces,the monthly runoff peak attenuates and the maximum and minimum of the monthly runoff volume change to uniform.