基于二维水动力模型的应急水源地引调水方案优化设计

Optimization of Water Transfer Scheme of Emergency Water Sources Based on the Two-Dimensional Hydrodynamic Model

近年来,各城市应急水源地工程建设较多,为改善水源地水动力情况,以某市拟建设的应急水源地为例,以二维水动力模型为基础,通过水体流速和换水周期两个比选条件准确、快速地优化出较为合理的引调水方案。结果表明:四种方案下,水源地流速情况和平均换水周期差别不大,整体换水周期有所不同,其主要取决于死水区处水体的置换情况;当两个进水口设置在盛行风向的垂直风向上同时进水,并开启上风向处的出水口时,应急水源地水体置换的效果较好。

In recent years,more and more cities are in the construction of emergency water sources projects.In order to improve hydrodynamic conditions,this paper takes a planned emergency water sources project as an example.Based on the two-dimensional hydrodynamic model,a more reasonable water transfer scheme will be proposed with the comparison of water flow velocity and water exchange period.The results indicate that there is few differences between the water flow velocity and the average exchange period referring to the simulation results of the four schemes.However,the overall water exchange period is different which depends on the water exchange condition of dead water zone.In order to improve the water exchange condition of the emergency water sources,two water inlets are proposed to be placed in the vertical position of prevailing wind direction and be switched on at the same time.Meanwhile,one water outlet upwind is suggested to be switched on.