资源调查与环境2012，Vol.33Issue(3)：206-210,5.
两种不同DEM处理方法提取的水系比较
Comparisons of water systems extracted from DEM with two different processing methods
刘昱恒 1徐宏根2
作者信息
- 1. 中国地质大学（北京）地球科学与资源学院,北京100083
- 2. 中国地质调查局武汉地质调查中心,武汉430205
- 折叠
摘要
Abstract
Water systems are not only important natural details, but also critical data sources for flood preven- tion, disaster reduction and exploitation of natural resources. Water systems are usually extracted from DEM （digital elevation data） with slope-runoff method, the accuracy of which is determined by the pro- cessing method of depressions in DEM. In order to study the effect of different DEM processing methods on the accuracy of extracted water system, we compared water systems extracted from DEM with two pro- cessing methods. In this study, DEM data based on J~d） algorithm and auxiliary data based on AGREE method were tested against 30 meter DEM for Liaohe River valley, Jiangxi Province. The results show that both of the methods are capable of extracting continuous drainage lines of similar orders, quantities and lengths. It revealed that the extracted water systems of two methods agree well in the steep mountain- ous region, but show large differences as for the well-populated flat area. Comparisons also demonstrated that the AGREE method enjoys high extraction accuracy than J＆D methods as for the flat area.关键词
水系/坡面径流法/提取精度/辅助数据Key words
water system/slope runoff method/extraction accuracy/auxiliary data分类
计算机与自动化引用本文复制引用
刘昱恒,徐宏根..两种不同DEM处理方法提取的水系比较[J].资源调查与环境,2012,33(3):206-210,5.
