基于DEM提取水域特征的一种算法实现

An algorithm for extracting watershed features based on DEM

本文提出并实现了一种基于规则格网DEM的地形特征线提取算法。该算法基于水文模拟方法,提出了平地、洼地的结构模型,研究了它们形成复杂洼地的拓扑关系,在此基础上设计了洼地填平等算法,简便快捷,在邙山小流域水土保持项目中得到应用,效果较好。

This paper presents an algorithm for watershed features extraction based on DEM.On the basis of hydrology simulation algorithm,we propose a structural model of the depressions and flats,and study the topological relations when forming the complex depressions.Then we design an algorithm to fill depressions.This approach has been used in the project of water and soil preservation in Mangshan small watershed.And the result proves its efficiency and convenience.