动态链表在提取数字流域排水结构中的应用研究  

Application of Dynamic Chain Table in Digital Drainage Structure Extraction

作　　者：安婷[1] 董增川[1] 程琳[2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室 [2]水利部水文局,北京100053

出　　处：《水文》2007年第2期63-67,53,共6页Journal of China Hydrology

基　　金：教育部科技重点资助项目(2004539812)

摘　　要：本文具体介绍了一种结合DEM和实际数字河网确定流域排水结构的方法。该方法引入了链表的概念,在利用流域实际数字河网从流域的出口向上游搜索的过程中,对于湖泊水库等宽度大于一个栅格的河网地区建立链表,通过图的遍历来确定有河网流过的栅格的水流方向。并对无河网地区进行相应处理,保证无河网地区流向的合理性。这样提取的河网可以保证是连续的,提取的模拟河网与实际河网的吻合显示出了高度的一致,并在一定程度上解决了实际洼地和伪洼地的判别。经过黄河流域的算例验证,表明该法简单可行。This paper introduced an automatic extraction method for the drainage network deriving based on the combination of DEM with DRLN, with the concept of chain table being proposed. When searching upward from the basin outlet to determine the flow direction of every grid, the chain table is established to record the area of lakes and reservoirs, whose width is larger than a grid. The method introduced guarantees that the simulation drainage network is continuous and consistent with the actual river network. Thus the method to a certain extent settles the problem of distinguishing the actual depression and the false depression. The application in the Yellow River indicates that this method is simple and practical.

关 键 词：数字高程模型 数字河湖网 链表 流域排水结构 

分 类 号：P333.9[天文地球—水文科学]