中文摘要：

基于DEM的流域水文模型是近年来水文模型的热点，而干旱半干旱地区的水文模型一直是水文研究的一个难题。分析了干旱地区的降雨产流特性，建立了符合该产流特性的数字高程模型和陕北模型相结合的水文模型，并将其应用到沮河流域桃曲坡水库的洪水预报中，计算结果证明该水文模型在干旱地区是切实可行的。

英文摘要：

The hydrological model based on DEM has become one of the hot topics of watershed hydrological models. The research on hydrological model in arid and semiarid regions is a difficult problem. The paper analyzes rainfall and runoff characteristics in arid region, and builds the hydrological model through integration of DEM with Shanbei Model. At the same time, the hydrological model is applied in the flood forecast of Taoqupo Reservoir in Ju River watershed. The result shows that this model is feasible to be applied in arid regions.