| 基于DEM的重庆三峡库区流域水系提取研究 |
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| 引用本文： | 俞雷,刘洪斌,武伟. 基于DEM的重庆三峡库区流域水系提取研究[J]. 西南大学学报(自然科学版), 2006, 28(2): 215-218 |
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| 作者姓名： | 俞雷 刘洪斌 武伟 |
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| 作者单位： | [1]西南大学资源环境学院,数字农业实验室,重庆400716 [2]西南大学信息学院,重庆400716 |
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| 摘 要： | 以重庆三峡库区为研究对象,论述基于数字高程模型提取流域水系的方法、原理。应用“Burn-in”算法,对DEM进行再处理,即将发生河道偏差的平坦区域上的实际河网叠加到DEM中,对河道及河道两侧所在栅格单元高程值进行修正,重新生成流域河网。在原有DEM不作较大修改的前提下,使得生成的河网与实际河网更加匹配,同时也保证了模拟结果的准确性。
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| 关 键 词： | DEM 水系 自动提取 |
| 文章编号： | 1000-2642（2006）02-0215-04 |
| 收稿时间： | 2005-09-05 |
| 修稿时间： | 2005-09-05 |
STUDY OF EXTRACTING DRAINAGE NETWORK OF THE THREE GORGES WATERSHED BASED ON DEM |
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| YU Lei ,LIU Hang- bin ,WU Wei. STUDY OF EXTRACTING DRAINAGE NETWORK OF THE THREE GORGES WATERSHED BASED ON DEM[J]. Journal of southwest university (Natural science edition), 2006, 28(2): 215-218 |
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| Authors: | YU Lei LIU Hang- bin WU Wei |
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| Affiliation: | 1. Key Laboratory of Digital Agriculture and Bioinformatics, Southwest University, Chongqing 400716, China; 2. College of Information, Southwest University, Chongqing 400716, China |
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| Abstract: | This paper discusses the methods and principles of extracting drainage network in the region of Chongqing Three Gorges based on DEM(Digital elevation model).The "Burn-in"method was used to re-process the DEM,i.e.the true steam network was split to the DEM in the plate area where the automatic steam network is different from the true one.Then the elevation values of the grid units were modified and stream network of the watershed was generated again.With just a slight modification,the generated network matched up to the true stream network better,thus ensuring a better veracity of the simulation. |
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| Keywords: | DEM Stream network Automatic extraction |
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