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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (2): 166-171.doi: 10.11924/j.issn.1000-6850.2012-1000

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于DEM的河网水系分形特征研究——以常德市桃源县为例

蒋甜 陈端吕   

  • 收稿日期:2012-03-20 修回日期:2012-04-10 出版日期:2013-01-15 发布日期:2013-01-15
  • 基金资助:
    湖南省自然科学基金项目“环洞庭湖区森林景观网络的复杂性研究”(09JJ6039)；湖南文理学院博士启动基金“水土保持目标下森林景观的自组织性与镶嵌性”(BSQD1015)；湖南文理学院2011年度大学生创新创业重点项目“基于DEM的常德市地貌形态特征量化与水文特性研究”(2011YC03)。

Fractal Geometry Analysis of River System Based on DEM: An Example of Taoyuan County, Changde City

  • Received:2012-03-20 Revised:2012-04-10 Online:2013-01-15 Published:2013-01-15

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摘要： 为了给流域的治理实践及理论研究提供基础性数字地形信息，以常德市桃源县为例，利用ArcGIS软件的水文分析扩展模块，探讨了DEM的制作处理，获取了研究区域水流流向、汇流累积量、河网水系等流域特征信息，同时用计盒维数和Horton定理2种水系分维数估算方法来估算水系分维数。结果表明：（1）运用DEM和ArcGIS的水文分析模块提取的水系连续完整，且与实际水系特征吻合性较好，是一种进行流域水文分析的优良方法；（2）利用DEM提取水系的分维值，与原水系分维值基本一致，说明利用DEM提取水系分维值的方法具有可行性；（3）根据分维值可以判定研究流域地貌处于幼年期，此时水系尚未充分发育。

关键词: 关中地区, 关中地区

Abstract: The hydrological features, such as flow direction, the cumulative volume of water, river networks were collected form DEM by using hydrology modules of ArcGIS software. The river network fractal dimension was analyzed by using box dimension and Horton theorem and provided basic data terrain information for the Taoyuan County practice and theoretical research. The results were as follows: (1) the generated steams were integrated and preferably accordant with actual steams by using DEM and hydrology tools of ArcGIS to analyze watershed hydrology; (2) The river network fractal dimension extracted from DEM was almost the same as the original one, and it’s a feasible way to extract fractal dimension from DEM; (3) According to the river network fractal dimension, the river system was still in the primary stage of erosion and growth.