子牙河流域河网编码与流域划分方法的研究  

Research on the Method of Drainage Network Coding and Watershed Subdivision of Ziyahe Watershed

作　　者：李大鸣[1] 徐好梅[1] 傅长锋[1,2] 白玲[1] 王志超[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]河北省水利水电勘测设计研究院,天津300250

出　　处：《中国农村水利水电》2012年第7期70-75,82,共7页China Rural Water and Hydropower

基　　金：河北省水利科研计划项目(HS2007-43);国家自然科学基金创新研究群体科学基金(51021004)资助项目

摘　　要：对改进的流域河网复合编码方法和基于主干河网与测点稀疏地形情况下的子流域分割方法做了详细的说明。河网复合编码将流域内各微小河段、河段连成的河道、河道级别、汇入节点逐次进行编码。子流域分割方法采用相对粗糙地形资料,无需进行洼地填充等前处理,直接从各微小河段出发遍历搜索汇入河段的集水区域,并对低洼地区进行二次搜索。将河网复合编码方法与子流域分割方法应用于子牙河流域,子流域划分结果与实际河网与流域控制面积资料对比基本吻合,为研究区域内各子流域的分区计算提供了良好的数据结构关系。数字流域模型的河网复合编码方法与子流域切割方法,能快速对流域中河段进行直接定位,方便流域点、线、面之间的拓扑关系运算,为分布式流域水文模型前处理提供了新的研究思路。A new method of drainage network coding and watershed subdivision is presented to automatically assign a group of composite codes to a drainage network and its associated watersheds.In the composite coding of drainage network,we code each tiny river reach,river branch and its level value and each branch mouth.Based on the relatively rough terrain,each subbasin is delineated by searching the catchment area from the river reach neighboring meshes.Without dealing with the sink-filling problem,some omissive low-lying land should be searched for the second time.These methods are used to establish a hydrological model of Ziya River Basin.Simulated results are in good agreement with practical situation,and they provide good data structure relations for calculation of runoff generation and concentration.The composite coding of drainage network and watershed subdivision methods can position the river reach quickly and directly,and they make topological relationship computing convenient.This research provides a new method for the pretreatment of distributed hydrological model.

关 键 词：河网编码 子流域分割 子牙河流域 测点稀疏地形 

分 类 号：TV11[水利工程—水文学及水资源]