杭州市闲林水库水质模拟研究

Water Quality Simulation Research of Xianlin Reservoir

钱塘江水源水质相对较差,而拟建的闲林水库工程作为杭州市备用饮用水源,由于水量不足需从钱塘江进行补水.补水后会对库区水质造成一定影响.通过建立二维水动力模型分析水库水体的复氧能力;采用完全混和水库水质模,选取污染物平均浓度时连续补水,污染物最大浓度时连续补水,污染物最大浓度时分阶段补水三种补水工况模拟计算水库氨氮、总磷、总氮的浓度,分析闲林水库的水源水质,为工程决策提供支持.

The proposed Xianlin Reservoir Engineering of Hangzhou City works as spare drinking water source, natural wa- ter quality is better but lack of water. The water quality in Qiantang river is relatively poor, therefore, moisturizing from Qiantang River will cause certain impact on water quality in reservoir area. A two-dimensional hydrodynamic model is es- tablished in this article for the analysis of reservoir water re-aeration. The complete mixing reservoir water quality model is adopted, selecting three stage simulation replenishment calculation： continuous replenishment in average pollutant concen- tration, and in the largest pollutant concentration and period replenishment in largest concentration, in order to calculate reservoir water ammonia nitrogen, total phosphorus, total nitrogen concentration in Xianlin Reservoir, providing theoretical support for project decision-making.