基于DEM技术的水下泥沙冲淤分析  

Analysis of Bank Erosion and Deposition Based on DEM

作　　者：黄志文[1] 陈亮[2] 葛小博 

机构地区：[1]江西省水利科学研究院,南昌330029 [2]西北勘测设计研究院工程科研分院,西安710048 [3]中国水利水电顾问集团贵阳勘测设计研究院,贵阳550002

出　　处：《黑龙江水专学报》2008年第1期22-25,共4页Journal of Heilongjiang Hydraulic Engineering College

摘　　要：河道冲淤分析是河床演变研究的主要技术方法。以DEM(数字高程模型)作为分析工具,对河床冲淤进行分析研究,不仅提高工作效率,而且提高成果的精度。同时由于水下地形不像陆地上的悬崖、陡坎之类的地形,在构建水下DEM时,考虑泥沙水下休止角的限制,从而进一步提高了计算的精度,为河床演变分析提供了新的研究方法。结合西安市河橡胶坝库区的冲淤情况进行了分析。Analyzing underwater terrain of river is the main technology for the research of the river-bank erosion. Based on DEM,analyzing underwater terrain of river-bank not only to improve efficiency, but also to enhance the accuracy. But it is impossible that there is terrain like cliff and scarp underwater as on land. Therefore, the underwater angle of repose of sediment should be considered as establishing the DEM underwater in order to improve the accuracy. As a result, it provides an innovative research method for analysis of river-bank erosion. The method is applied in the inflatable reservoir in the Chan River of Xi＇an City for analysis on scouring and siltation.

关 键 词：冲淤分析 DEM 泥沙 水下休止角 河床演变 

分 类 号：TV147.5[水利工程—水力学及河流动力学]