| 基于局部地表形态的可变过水宽度多流向算法 |
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| 引用本文： | 程海洲,熊立华. 基于局部地表形态的可变过水宽度多流向算法[J]. 地理科学, 2011, 31(2): 218-225. DOI: 10.13249/j.cnki.sgs.2011.02.218 |
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| 作者姓名： | 程海洲 熊立华 |
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| 作者单位： | 武汉大学水资源与水电工程科学国家重点实验室, 湖北 武汉 430072 |
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| 基金项目： | 国家自然科学基金项目(51079098)、国家自然科学基金重点项目(40730632)资助 |
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| 摘 要： | 流向是地形分析中的重要内容之一,在分布式水文模型等研究中起着重要作用。文章提出基于局部地表形态的多流向算法,即对每一个DEM栅格,在以其为中心的3×3窗口中进行局部地形分析,确定基于随坡度和过水宽度而变化的水流分配系数。该方法被应用在实际数字地形模型上,并以汇水面积和比汇水面积为研究指标,与目前流行的D8、Dinf等算法进行了相似性分析。结果表明,该方法能够获得更为符合实际的水流汇集的空间分布。
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| 关 键 词： | 地表形态 可变过水宽度 多流向算法 |
| 收稿时间： | 2010-01-15 |
| 修稿时间： | 2010-02-11 |
A Local Topography-based Variable Outflow Width Method for Determining Multiple Flow Directions of DEM |
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| CHENG Hai-zhou,XIONG Li-hua. A Local Topography-based Variable Outflow Width Method for Determining Multiple Flow Directions of DEM[J]. Scientia Geographica Sinica, 2011, 31(2): 218-225. DOI: 10.13249/j.cnki.sgs.2011.02.218 |
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| Authors: | CHENG Hai-zhou XIONG Li-hua |
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| Affiliation: | State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China |
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| Abstract: | It is one of the important contents in the topography analysis as well as in the hydrological distribution models that how to determine flow directions of water in each cell of DEM.Although many hydrologists have already put forward a lot of different flow direction algorithms over the past dozens of years.A new approach of assigning flow directions of DEM cell is proposed in this study,which is called local topography-based variable flow width method.This approach is based on the analysis of the local topo... |
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| Keywords: | watershed topography variable outflow width multiple flow directions algorithm |
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