近年来，快速城市化导致流域不透水面大量增加，流域降雨径流关系发生显著变化，城市洪涝灾害频发和水资源短缺问题凸显。本研究选择北京市温榆河沙河闸以上流域为研究区域，采用卫星遥感、室内实验和水文模拟等方法，系统分析近30年温渝河流域不透水面演变格局和径流序列变化特征，研究不透水面对降雨产流过程的影响机理，构建分布式次暴雨洪水和日降雨径流模型，揭示研究区不透水面增加对短时暴雨洪水和流域长期径流的影响。研究结果对深入理解不透水面的水文水资源效应有重要意义，可为北京市洪涝灾害防治、水资源综合管理提供科学依据。

In recent years, rapid urbanization process results in the massive increasing in impervious surface. Thus the relationship of rainfall-runoff is significantly changed, and the problem of flood disaster and water shortage become severe. This project takes Wenyuhe sub watershed in Beijing as an example and the contents include: 1) analyze the temporal-spatial changes of impervious surface by remote sensing method and study the relationship between the change of land use and the change of runoff; 2) study the influence of impervious change on precipitation-runoff processes by indoor laboratory experiment; 3) build a distributed hydrologic model considering the effect of impervious surfaces; 4) Assess the effects of impervious surface increasing on flood events and annual runoff through scenario simulation. The outcome of the study would help in flood controlling, water resources planning and sustainable city development in Beijing.