摘要
文章以天津于桥水库上游流域为研究对象,以DEM(数字高程模型)为基础数据,对DEM生成方法、DEM精度、流域地形地貌特征及阈值的选取三个方面分别作了详细研究。试验结果表明,从于桥水库上游流域的水文特征所提取的河网分布与河流与实际分布情况基本吻合,淋河、沙河、黎河三大流域的面积误差范围分别为-3.44%、2.28%和7.63%。
Taking the upper stream of Tianjin Yuqiao reservoir as the research object, this paper makes a detailed research on the three aspects of digital elevation model（DEM） generation method, DEM accuracy and topography features of the watershed and threshold selection by taking DEM as the basic data resources. The results show that the river network distribution which is extracted from the watershed hydrological characteristics of the upper stream of Yuqiao reservoir is basically consistent with the actual distribution of the rivers. The area of error of Lin River, Sha River and Li River are -3.44% ,2. 28% and 7. 63%, respectively.
出处
《环境科学与管理》
CAS
2011年第9期131-135,163,共6页
Environmental Science and Management
基金
国家自然科学基金项目(No.30970505)
天津师范大学人才引进项目(No.5RL084)
关键词
DEM
河网提取
流域模拟
水文分析
DEM
river network extraction
watershed simulation
hydrological analysis
