基于DEM的水量水质模型算法  

Arithmetic research of water quantity and quality model based on DEM

作　　者：张艳军[1] 雒文生[1] 雷阿林[2] 叶闽[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]长江水资源保护科学研究所,湖北武汉430051

出　　处：《武汉大学学报（工学版）》2008年第5期45-49,共5页Engineering Journal of Wuhan University

摘　　要：为使水量水质模型标准化、模块化,更方便、快捷地跟地理信息系统耦合,提出一种以DEM为计算网格,纳入对DEM进行前处理的GIS(Geographic Information System)算法,采用同位网格布置变量,使用有限体积法离散方程,SIMPLEC法求解运动方程的新水量水质模型算法,并详细论述了该算法在使用DEM后,在水体识别、边界生成、初边条件、动边界处理和代数方程组求解等方面的处理方法.最后,将该算法应用于三峡水库突发性水污染事件应急响应系统的水量水质模型模块,证明该算法准确可靠,可与GIS系统从网格层次无缝耦合,在资料输入时能省略前处理步骤,系统能快速移用于不同的水域,具有较大的实用价值.In order to standardize the water quantity and quality model and make it as a natural foundation of geographic information system （GIS）, this paper provides a new algorithm which uses digital elevation model （DEM） as grid and contains some methods which are algorithm for DEM, collocated grid, FVM, and SIMPLEC. The water body recognition, boundary generation, initial and boundary conditions, moving boundary, solving linear algebraic equations are expounded in detail. At last, the new algorithm is applied to the Three Gorges emergency system successfully so as to offer an efficient algorithm to GIS.

关 键 词：DEM 水量水质模型 SIMPLEC 三峡 应急响应系统 

分 类 号：X143[环境科学与工程—环境科学]