摘要
水库库容是库区水资源储量的重要指标,也是水利枢纽设计和运营管理重要参数之一。传统的库容计算方法是在已有的地形图上采用求积仪法进行,当精度要求较高时,需到现场实测更大比例尺的地形图。基于此,重点讨论和分析了基于数字高程模型的库容计算方法,重点分析了数字高程模型的组织、内插精度和库容计算方法及精度等问题,并将求积仪法和数字高程模型法的基本原理和优缺点进行了对比分析,从理论上讨论了两种方法的适用范围、条件及精度。以长江三峡水利枢纽为实例,将自行设计软件和商用软件库容计算模块进行了对比分析,实验结果表明,基于数字高程模型的库容计算方法具有适用范围广、计算速度快,能满足高精度要求等优点。
Reservoir capacity is a key index of water resource in the area of reservoir and it is a crucial parameter to design and operate a water control project. In traditional reservoir capacity calculation, a planimeter is used to obtain a reservoir capacity from topographic maps and large scale topographic maps are needed if high accuracy is required. In this paper, a reservoir capacity calculation approach based on grid DEM is proposed. The data orga- nization and interpolation accuracy of DEM are analyzed. In comparison with traditional and DEM-based reservoir capacity calculation methods, advantages and disadvantages of each method are discussed. Taking Three Gorges Project as example, a self-design software of reservoir capacity calculation is developed and compared with commercial software, Erdas and Arcinfo. Experimental results approve that reservoir capacity calculation approach based on grid DEM has characteristics of high accuracy, fast computation speed and widespread application.
出处
《长江科学院院报》
CSCD
北大核心
2009年第3期49-52,56,共5页
Journal of Changjiang River Scientific Research Institute
基金
三峡工程开发总公司重点科研项目(三峡水库动库容研究2005073-kj04)
关键词
3S技术
DEM
库容计算
精度
3s technology
DEM
reservoir capacity calculation
accuracy
作者简介
谭德宝（1966-），男，湖北巴东人，教授级高级工程师，主要从事空间信息技术应用研究，（电话）027-82820076（电子信箱）Tandb@cjw．com．cn。
