河网径流节点及其基于DEM的自动提取

Stream Runoff Nodes and Their Derivation Based on DEM

河流的交汇点是在地貌、水文上均有重要意义的特殊地段,在GIS中又融合了大量的时空信息。从河流水文学与地理信息系统结合的角度,首先提出了河网径流节点的概念,分析了河网径流节点的基本特征,包括河网径流节点的属性特征、空间分布特征、时间变异特征等方面的内容,并对河网径流节点在地学空间分析中的应用进行了展望。此外,对以DEM数据为基础提取河网径流节点的原理、方法进行了初步的探索。

This paper put forward the concept of 'stream runoff node' firstly, which could be regarded as a critical development in recognizing and analyzing the hydrological and geographical characteristic of stream networks. The major characteristics of runoff nodes were investigated. Including how runoff nodes could effectively reflect drainages terrain and relief features, their dynamic variation and spatial distribution etc. Finally, a GIS based method of deriving runoff nodes from DEM were preliminarily discussed. 