某小区二次供水水池三维水力模拟分析

Three Dimensional Hydraulic Simulation Analysis of a Secondary Water Supply Pool in a Certain Residential Area

二次供水作为城市居民供水的重要环节,其设计的合理性及后期的运维管理对龙头水质有着重要的影响。通过采用三维水力模型对水池建立数学模型,分析水龄总氯的变化过程、死水区占比,从而确定最优方案,为后期改造提供建议和依据。本文选取三个时段进行模拟,模型显示在第一时间段内整体水质较好,基本上总氯浓度都在0.4 mg/L左右,水平面方向上混合效果比较迅速。在第二时间段内一开始水池内水质较好,但是随着水池进水减少,水池内总氯浓度明显随时间逐步下降,不过总体仍然能保持在0.3 mg/L左右。在第三个时间段内水池中总氯浓度不断降低,最后平均总氯浓度只有0.22 mg/L。

As an important part of urban residential water supply,the rationality of secondary water supply design and subsequent operation and maintenance management have a significant impact on the water quality of the faucet.By using a three-dimensional hydraulic model to establish a mathematical model of the water tank,the change process of total chlorine in water age and the proportion of dead water zone are analyzed,in order to determine the optimal plan and provide suggestions and basis for later renovation.This article selects three time periods for simulation,and the model shows that the overall water quality is good in the first time period,with a total chlorine concentration of around 0.4 mg/L,and the mixing effect is relatively rapid in the horizontal direction.At the beginning of the second time period,the water quality in the pool was good,but as the inflow of water decreased,the total chlorine concentration in the pool gradually decreased over time.However,overall,it could still be maintained at around 0.3 mg/L.During the third time period,the total chlorine concentration in the pool continuously decreased,and the average total chlorine concentration was only 0.22 mg/L.