| 基于DEM流域河网水系的提取研究 |
| |
| 引用本文： | 孙艳玲,刘洪斌,谢德体,郭鹏,武伟. 基于DEM流域河网水系的提取研究[J]. 资源调查与环境, 2004, 25(1): 18-22 |
| |
| 作者姓名： | 孙艳玲 刘洪斌 谢德体 郭鹏 武伟 |
| |
| 作者单位： | 1. 西南农业大学资源环境学院,重庆,400716
2. 西南农业大学信息学院,重庆,400716 |
| |
| 基金项目： | 重庆市科委攻关项目(6217)，重庆市教委科技项目(011802)资助。 |
| |
| 摘 要： | 本文介绍了一种从DEM中提取流域河网水系的实用方法。该方法首先对DEM进行预处理即洼地的确定、填充和平地的抬升；然后采用D8算法确定．DEM中每一个栅格单元的水流方向，根据水流方向数据，计算每一个栅格单元的上游集水面积，再根据给定的阈值，得出河流栅格网络图，生成需要的水系。此外，以古佛河小流域为例进行了水系提取，其结果与实际水系几乎完全匹配。
|
| 关 键 词： | 数字高程模型 水系 提取 |
| 文章编号： | 1671-4814(2004)01-018-05 |
| 修稿时间： | 2003-08-21 |
Study of extracting drainage network of watershed from digital elevation model |
| |
| SUN Yan-ling,LIU Hong-bin,XIE De-ti,GUO Peng,WU Wei. Study of extracting drainage network of watershed from digital elevation model[J]. Resources Survey & Environment, 2004, 25(1): 18-22 |
| |
| Authors: | SUN Yan-ling LIU Hong-bin XIE De-ti GUO Peng WU Wei |
| |
| Affiliation: | SUN Yan-ling~1,LIU Hong-bin~1,XIE De-ti~1,GUO Peng~1,WU Wei~2 |
| |
| Abstract: | A practical method of extracting drainage network of watershed from DEM is introduced in this paper.The method,first,needs to pre-process DEM data that is depressions to be identified and filled and flat areas are lifted.And then the flow direction of every grid cell in the DEM is determined according to the D8 algorithms.Thirdly, the upstream catchment's area of every grid cell can be calculated on the basis of the data of grid cell flow direction. Fourthly, based on a threshold value of upstream catchment's area, the grid cells in river lines can be picked out.Finally, the drainage network is extracted.Otherwise,taken Gufo river as an example of extracting drainage network, the results are basically consistent with the factual drainage network. |
| |
| Keywords: | DEM drainage network extraction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
