基于SWMM的感潮河网水环境整治方案研究

Research on Water Environment Improvement Plan of Tidal River Networks Based on SWMM

为探索水环境调度和水系连通对感潮河网的水环境改善作用,运用SWMM软件建立了河网水动力数学模型,选取了枯水期和丰水期两种典型潮汐条件,通过对沿江水闸的合理调控,模拟了不同的自流引水和动力提水调度方案对于水体流动性的改善作用,得出最佳调度方案。在最佳调度方案的基础上进一步建立水系连通整治后的河网水动力–水质模型,分析了水系连通整治对河网中氨氮浓度的降低效果。数值模拟的结果表明,通过科学的水环境调度,并辅助水系连通整治措施,河网的水动力和水质得到明显改善。研究结果可为南通经济技术开发区的水环境调度和水系连通整治工程提供科学的依据,也为同类型的感潮河网城市水环境整治提供一定的借鉴作用。

In order to explore the effect of water environment regulation and water system connection on the improvement of the water environment of the tidal river network, the SWMM was used to establish a river network hydrodynamic model, and two typical tides were selected during the dry season and wet season conditions, through the reasonable adjustment of the sluices along the river. The effect of different artesian water diversion and dynamic water-lifting scheduling schemes on the improvement of water body fluidity was simulated, and the best scheduling scheme was obtained. Based on the optimal dispatching plan, the river network hydrodynamics-water quality model after the water system connection improvement was established to analyze the improvement effect of the water system connection improvement on the ammonia nitrogen concentration in the river network. Numerical simulation results show that through scientific water environment regulation and auxiliary water system connection, the hydrodynamics and water quality of the river network have been significantly improved. The research results can provide a scientific basis for the water environment regulation and water system connection improvement project in Nantong Economic and Technological Development Zone, and provide a certain reference for the same type of tidal river network cities.