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河网自动提取技术中DEM的几种预处理算法及应用 被引量:4

Comparison and application of several DEM hydrologic preprocessing algorithms for automated drainage network extraction
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摘要 在基于DEM自动提取流域水系的过程中,AVSWAT2000模型提供了处理凹地和平坦区的功能,但在实际应用中仍存在一些问题,如有时无法形成相互联结的完整水系,会出现不合理的水系分支等.围绕基于DEM的河网自动提取技术,对凹地和平坦区的DEM预处理方法进行了比较和评述,并将AoTianqi等提出的DEM预处理算法应用于实际模拟研究.结果表明,该算法能较好地改善AVSWAT2000在自动提取流域水系中所表现出来的凹地和平坦区处理方面的不足,推求的河网及流域出水口与数字河网具有较好的一致性. In regard to some problems of AVSW?AT2000 model in the treatment of flat areas and depressions based on DEM, such as unable to form an integral drainage network with unreasonable river branches occurring, etc., a comparative analysis was made of DEM algorithms for pretreatment of flat areas and depressions in the process of automatic extraction of drainage networks. The DEM preprocessing algorithm, presented by Ao Tianqi, et al. was applied to practical simulation. The result shows that the algorithm overcomes the disadvantages of AVSW?AT2000 model. The drainage network and outlet information derived by the algorithm are in good agreement with digital stream networks.
出处 《河海大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第4期386-390,共5页 Journal of Hohai University(Natural Sciences)
基金 国家科技部"973"资助项目(2002CB412300-1) 中国科学院知识创新工程资助项目(KZCX1-SW-12) 河海大学水文水资源与水利工程科学国家重点实验室开放基金资助项目(2004405311)
关键词 河网自动提取技术 DEM 预处理算法 <Keyword>automated drainage network extraction DEM preprocessing algorithm
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参考文献16

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