上海青浦城区西北片河网引清调水的研究

Study on Water Transfer in a River Network Located on the Northwest Part of Qingpu Urban Area in Shanghai

基于河道水体溶解氧浓度随时间变化的实测数据,得出了上海青浦城区西北片河网在不同季节下的引清调水频率;采用经过实际调水过程验证的数学模型,对7种边引边排工况下的河网内水流运动进行了数值仿真,获得了每种工况下的水流速度场分布。以水流速度场模拟结果为基础,分析了现有水利设施条件下青浦城区西北片河网内水体的流动性,进而提出了为实现河网水体的流动自净功能应打通留水河和进行新的水利设施建设(如配置新的高流量水泵等)的建议。

The frequency of water transfer in a river network located in the northwest part of Qingpu Urban Area in Shanghai has been obtained based on the field measured data of dissolved oxygen concentration of the river change with time.The water flows in the river network under seven different scenarios of water transfer are numerically simulated using the mathematical model validated by real water transfer experiments.The distribution of water velocity field in each scenario was obtained.Based on the numerical simulated results of water velocity fields,the characteristics of water flow in the river network was analyzed under the present hydraulic infrastructure conditions,and finally the suggestions of getting through the Liu Shui River and constructing new hydraulic infrastructures were made out.