利用DEM划分雨水汇水面积的方法研究  

Research on Rainwater Catchment Area Delineation Based on DEM

作　　者：马立山[1,2] 姚力 张海平[2] 郝彩侠[2] 杨国丽[2] 

机构地区：[1]天津大学机械工程学院,天津300072 [2]河北建筑工程学院城市建设系,河北张家口075024 [3]天津警备区后勤部,天津300020

出　　处：《中国给水排水》2011年第15期56-59,共4页China Water & Wastewater

基　　金：2007年河北省高等学校科学研究计划指令项目(2007436)

摘　　要：针对传统的雨水汇水面积划分方法对地形考虑粗略、自动化程度低和人为因素影响大的特点,以城市路网和雨水管线共同组成的排水路线为研究对象,结合数字高程模型(DEM)数据,通过填洼、流向分析及修正、汇水面积划分等方法获得各段排水路线的汇水面积。分析过程突出了地形对汇流的影响,划分准确且自动化程度高。在此基础上可进一步获取各段排水路线上游的汇水面积以及汇水面积特征宽度等重要参数。研究结果可为雨水管网的规划设计及优化分析提供有价值的参考。The traditional rainwater catchment area delineation method is imprecise because of im- proper usage of terrain data, low automation level and great impact of human factors. Taking drainage lines composed of urban roads and storm sewers as research object, the catchment area of these lines are achieved using digital elevation model （DEM）, sink filling, flow direction computation and adjusting, catchment area delineation. The analysis process emphasizes the impact of terrain on catchment and the delineation is precise and automatic. The important parameters like the catchment area and width in up- stream of the drainage lines can be calculated based on this. The results can provide valuable reference for planning, design and optimized analysis of rainwater pipe network.

关 键 词：雨水汇水面积划分 数字高程模型(DEM) 排水路线 GIS 

分 类 号：TU992.02[建筑科学—市政工程]