中文摘要：

综合径流系数是城市雨水管网规划设计和等流时线模型构建的重要参数。基于可获得的遥感图像，通过汇水子区域划分、地表覆盖非监督和监督分类、DEM坡度分析和GIS叠置分析等步骤，获得不同地表覆盖和坡度条件下的面积权重，并根据相关类型区域径流系数的经验数值，获得区域综合径流系数。将按照该方法获得的径流系数输入到Mike Urban等流时线模型中，模拟结果与实测结果的Nash系数达到0．57，初步证实了该方法的可行性。

英文摘要：

Comprehensive runoff coefficient is a very crucial parameter for urban stormwater system planning and design as well as development of isochrone model. Based on available remote sensing images, an area weight of different covers and slopes can be obtained through sub-catchment delineation, surface coverage unsupervised and supervised classification, DEM slope analysis and GIS overlay analysis. Then the comprehensive runoff coefficient can be acquired by employing the corresponding empirical value. The runoff coefficient obtained by this method was input to the Mike Urban isochrone model, and the Nash coefficient of simulation results and measured results was 0.57, which preliminary confirmed the feasibility of this method.