基于MIKE21的古田溪抽蓄电站对下库水环境影响分析  

Analysis on Impact of Gutianxi Pumped Storage Power Station on Water Environment of Lower Reservoir Based on MIKE21

作　　者：吴昌淦 WU Chang-gan(Fujian Provincial Investigation,Design&Research Institute of Water Conservancy&Hydropower Co.,Ltd.,Fuzhou 350001,China;Fujian Provincial Key Laboratory of Hydrodynamics&Water Engineering,Fuzhou 350001,China)

机构地区：[1]福建省水利水电勘测设计研究院有限公司,福州350001 [2]福建省水动力与水工程重点实验室,福州350001

出　　处：《四川环境》2025年第2期86-94,共9页Sichuan Environment

摘　　要：为分析古田溪抽蓄电站对下水库水环境的影响,采用MIKE21软件构建了下水库清淤后的二维水环境数学模型,针对其污染负荷较大的曹洋溪支流,探究现状水质、仅生态补水、再经污染治理3种情况下的影响结果。结果表明,抽蓄电站运行后,下水库水位最大变幅8.46m,日内流场变化较大;曹洋溪经过生态补水及水环境综合治理的工况下,对抽至上水库的水体水质影响最小,仅总磷仍会超出Ⅲ类湖库标准60min,最大浓度0.052mg/L;发电时曹洋溪汇入口至库中形成长1250m、宽300m的污染带。研究成果印证曹洋溪实施污染治理的必要性,也可为其他混合式抽蓄电站工程分析水环境影响提供一定借鉴。In order to analyze the influence of Gutianxi Pumped Storage Power Station on the water environment of the lower reservoir,a two-dimension mathematical model for water environment of lower reservoir after dredging was established by using MIKE21.Aiming at the Caoyangxi tributary with heavy pollution load,the influence results of the current water quality,only ecological water supplement and pollution control were explored.The results showed that when the pumped storage power station was put into operation,the water level of the lower reservoir varied by 8.46 m,and the daily flow field changed greatly.Under the condition of ecological water supplement and comprehensive management of water environment,Caoyangxi tributary had the least impact on the quality of water pumped to the upper reservoir,and only the total phosphorus still exceeded the standard of ClassⅢlake and reservoir for 60min,with the maximum concentration of 0.052 mg/L;and during power generation,a pollution zone with a length of 1250 m and a width of 300 m was formed from the entrance of Caoyangxi tributary to the reservoir.The research results prove the necessity of pollution control in Caoyangxi tributary,and also provide references for other mixed type pumped storage power station projects to analyze the water environment impact.

关 键 词：MIKE21 抽水蓄能 混合式 古田溪 水环境 

分 类 号：X824[环境科学与工程—环境工程]