平原区二维复杂河流水质模拟计算

研究了湘江航运大源渡枢纽工程对湘江衡阳市区段水质影响的二维的数值计算方法，研究河段具有河道弯曲、分汊、江心有洲的复杂特点，应用有限单元法与单元网络划分的有关理论，在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不质数值计算的方法，并计算出了研究河段水质的浓度场分布，应用所建立的方法，可以进行各种复杂地形条件和不同水位情况下平原区线水河流水质的数值计算。

Numerical calculation of water quality for two-dimensional winding river with two branches resulted from an isle in plain region

Considering the effect of Dayuandu Navigational key Project. the two\|dimensional numerical calculation modeling of water quality in Hengyang City section of the Xiangjiang River was studied. The section is winding with two branches resulted from an isle. When the velocity field data can not be available, the numerical calculation modeling of water quality of the river is set up on the basis of applying topographic map of the river course and the finite element method .The numerical calculation algorithm for the water quality modeling set up in this paper can be applied to shallow river with similar topographically complicated river course in plain region.