石佛寺水库二维水动力及水质数值模拟与分析  

Numerical simulation analysis on two-dimensional hydrodynamics and water quality of Shifosi Reservoir based on MIKE21

作　　者：胡艳海 周林飞[1] HU Yanhai;ZHOU Linfei(College of Water Conservancy,Shenyang Agricultural University,Shenyang 110866,China)

机构地区：[1]沈阳农业大学水利学院,辽宁沈阳110161

出　　处：《人民长江》2021年第1期31-38,共8页Yangtze River

基　　金：辽宁省水利科学技术项目(20170147)。

摘　　要：石佛寺水库位于辽河干流,具有重要的生态功能。以石佛寺水库为研究对象,基于MIKE21软件的二维水动力模块和水生态模块,对水库生态系统内物理、化学、生物反应进行数值模拟研究,以为水库水环境管理提供一定的科学参考。首先,通过实测数据对模型的参数进行了率定和验证,确定了石佛寺水库二维水动力和水质模型的有效性;然后,运用该模型模拟分析了汛期和非汛期两种工况下的水动力情况,并以水库水动力条件为基础,分析了溶解氧、氨氮、五日生化需氧量、化学需氧量、总氮、总磷6项水质指标的浓度分布情况。结果表明:来水量是影响水库水动力的主要因素;库区内水体流动性良好、无回流区,有利于水体的交换以及污染物的去除;辽河水流经水库后逐级得到了净化,且净化效果在汛期优于非汛期。Shifosi Reservoir locates on the main stream of Liaohe River,and has important ecological function.Taking Shifosi Reservoir as the research object,based on the two-dimensional hydrodynamic module and hydro-ecological module of MIKE21 software,we simulated the physical,chemical and biological reactions in the reservoir ecosystem to provide scientific references to its environmental management.Firstly,the parameter calibration and model verification were carried out by using the measured data.The results showed that the parameter setting was reasonable and the errors met the accuracy requirements.Secondly,the hydrodynamic model was used to simulate and analyze the hydrodynamic conditions under the flood season and non-flood season.Based on the hydrodynamic conditions of the reservoir,we simulated the degradation and migration diffusion processes of dissolved oxygen,ammonia nitrogen,five-day biochemical oxygen demand,chemical oxygen demand,total nitrogen and total phosphorus.The results showed that the inflow quantity was the main factor affecting the hydrodynamics of the reservoir,the water body in the reservoir area had good fluidity,without re-circulation area,which was conductive to the exchange of water body and the removal of pollutants.The Liaohe River flowed through the reservoir and was purified step by step,and the purification effect in flood season was better than the non-flood season.

关 键 词：水库水质 水动力条件 数值模拟 石佛寺水库 辽河 

分 类 号：TV697[水利工程—水利水电工程]