二维弯曲分汊河流水质数值计算

本文研究了湘运航运大源渡枢纽工程对湘江衡阳市区段水质影响的二维数值计算方法，研究了河段具有河道弯曲，分汊，江心有洲的特点，应用有限单元法与单元网络划分的有关理论，在缺乏河流速度场资料的情况下，建立了利用河道水下地形图进行河流水质数值计算的方法，并计算出了研究河段水质的浓度场分布，应用本文建立的方法，可以进行各种复杂地形条件和不同水位情况下浅水河流水质的数值计算。

Numerical Calculation of Water Quality in Two-dimensional Winding River with a Branch

In this paper,two-dimensional numerical calculation of water quality inHengyang City proper section of the Xiangjiang River is studied considering the effect ofDayuandu Navigational Key Project of the River. The section is winding , and has aBranch as well as an island. On the condition of lacking velocity field data,numerical calculation of water quality of the river is set up on the basis of applying topographic mapof the river course,finite element method and relavant theories of triangulation. Concentration field of water quality of the river is also calculated. Numerical calculation of water quality set up in this paper can be applied to shallow water river with complicatedriver course at different water level.