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基于DEM的流域特征提取及应用
引用本文:秦福来,王晓燕,王丽华,张美华.基于DEM的流域特征提取及应用[J].河北师范大学学报(自然科学版),2006,30(1):109-112.
作者姓名:秦福来  王晓燕  王丽华  张美华
作者单位:首都师范大学,资源环境与旅游学院,北京,100037
基金项目:北京市科技新星计划项目
摘    要:依据数字高程模型(DEM)提取流域特征信息的基本原理,对DEM在非点源污染研究领域的应用进行了有益的探索.应用密云水库北部流域的DEM进行了流域的刻划及SWAT模型运行单元水文响应单元(HRUs)的生成,在集水区面积阈值为2 km2的水平上得到的流域水系主河道与实际水分有最大相似性,共生成310个子流域和594个HRUs.从DEM刻划结果准确性的检验等3个方面讨论并总结了应用结果.

关 键 词:DEM  流域特征  集水面积阈值  非点源污染
文章编号:1000-5854(2006)01-0109-04
收稿时间:2005-05-20
修稿时间:2005-09-10

Extracting Topographic Structure from DEM and Application
QIN Fu-lai,WANG Xiao-yan,WANG Li-hua,ZHANG Mei-hua.Extracting Topographic Structure from DEM and Application[J].Journal of Hebei Normal University,2006,30(1):109-112.
Authors:QIN Fu-lai  WANG Xiao-yan  WANG Li-hua  ZHANG Mei-hua
Institution:College of Resource Environment and Tourism,Capital Normal University,Beijing 100037,China
Abstract:The development of DEM(Digital Elevation Model,DEM) and the principle and method to extract topographic structure are generalized.Based on the need of watershed non-point source pollution simulation research,and under the support of non-point source model SWAT,the DEM of the north of Miyun reservoir is delimitated.By using the catchment threshold value of 2?km~2,the watershed model the most similarly to the reality,there are 310 sub-watershed and 594 HRUs.Finally,the utilization of DEM in the research of non-point source pollution is concluded three aspects:the test of the veracity of DEM delimitations results,the influence of DEM precision on the extractions of watershed hydrological characters,and the influence of drainage area threshold value in DEM delimitations to watershed hydrological analysis.
Keywords:DEM  watershed character  drainage area threshold  non-point source pollution
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