松花江三姓浅滩航道整治的二维数值模拟研究

2 D numerical simulation on waterway regulation of Sanxin shoal on the Songhuajian River

松花江三姓浅滩上段河床由沙质组成，但沙质覆盖层很薄，中下段底质坚硬由石质组成并有基岩裸露。本文以三姓浅滩航道整治工程为例，应用航道工程泥沙数学模型［１～２］，由一期整治工程作用下的水面线、流场及河床变形资料率定模型中的糙率、推移质输移方程等，然后进行二期整治工程作用下的水流及河床变形模拟，并与实体模型试验资料进行了比较。

The river bed of the upper part of Sanxin shoal on the Songhuajing river are composed of a thin sand layer and gravel, and exposed bed rocks on its middle and downstream parts of the shoal. Based on the data of water level, velocity field and river bed deformation under the first stage regulating works, the sediment mathematical model of waterway was appiled to calibrate the roughness,and the bedload transportation etc. Then,the water flow structure and riverbed deformation were numerically simulated under the second stage regulating works. The calculated results are in close agreement with the experimental data from the physical model.