欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (2): 172-177.doi: 10.11924/j.issn.1000-6850.2012-2376

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于DEM的东江湖风景区水文分析研究

张国珍 严恩萍 洪奕丰 陈利 莫登奎   

  • 收稿日期:2012-07-03 修回日期:2012-07-19 出版日期:2013-01-15 发布日期:2013-01-15
  • 基金资助:
    国家自然科学基金资助项目“基于遥感影像的森林资源智能区划关键技术研究”(31100412)；国家林业局林业公益项目专题“林分结构与生长模拟技术研究”(201104028)。

Study on the Hydrological Analysis of Dongjiang Lake Scenic Area Based on DEM

  • Received:2012-07-03 Revised:2012-07-19 Online:2013-01-15 Published:2013-01-15

PDF (PC)

948

摘要： DEM(Digital Elevation Model)是流域分析的主要数据源，提供了丰富的地质地貌、水文信息。详细介绍了利用DEM数据提取水文特征的方法，包括洼地填充、水流方向、汇流累积量、水流长度和水文分析。以东江湖流域为例，采用ArcGIS软件的Hydrology模块提供的D8算法以确定水流方向，通过汇流累积量的计算和相关阈值的设定，提取东江湖水文特征。结果表明，研究区最大水流长度为113651 m；采用该算法模拟的流域数字水系与水利部门提供的地形数据基本相符，真实反映了研究区水系的空间分布规律，为进一步研究东江湖流域的植被生态环境演变提供基础数据和参考。

关键词: 社区, 社区

Abstract: DEM (Digital Elevation Model) is one of the primary data source for watershed analysis, provides wealthy information of geological features, hydrology and others. The author introduced the method to extract hydrological features by DEM data, including depression filling, flow direction, flow accumulation, flow length and hydrology analysis. Flow direction was determined by the D8 algorithm which was provided by hydrology module in ArcGIS software. Through the calculation of flow accumulation and settings threshold, the hydrological features of Dongjiang Lake were extracted. The results showed that, the maximum flow length of study area was 113651 m; there was a certain degree of soil erosion, which in some areas was more serious. The watershed digital drainage simulated by the algorithm was consistent with the topographic data provided by the water resource department, which reflected the spatial distribution for the rivers in study area and provided basic data for further study of vegetation ecology environment change in drainage area of Dongjiang Lake.