Impact of Construction and Operation of Pumped Storage Power Stations on Groundwater Environment——Taking the Dazhuangli Pumped Storage Power Station in Shaanxi as an example
Pumped storage power stations are a key link in China's power grid system with their sustainable and efficient peak regulation,frequen-cy regulation,phase regulation and emergency standby power stations.The impact of pumped storage power station on groundwater environment has always been the focus and difficulty of during its construction and development.In order to explore the impact of pumped storage power sta-tions on the groundwater environment,the Dazhuangli Pumped Storage Power Station,a key implementation project of the"14th Five-Year Plan"of Shaanxi Province's pumped storage planning,is taken as an engineering example to analyze and discuss the impact of pumped storage power stations on the groundwater environment.By analyzing the regional hydrogeological conditions,combined with water pressure test and water quality analysis,the site groundwater environment evaluation is carried out.Combined with the simulation of the seepage field,the impact on the ground-water environment during the construction and operation periods is predicted,and corresponding environmental protection measures are proposed.The results show that the impact on the groundwater environment during the construction and operation periods is mainly reflected in the decline of the groundwater level.The groundwater depth of the upper reservoir is shallow and the water volume is not abundant.The excavation of the reser-voir bank will change the discharge conditions of the groundwater,and the groundwater level around the reservoir will drop slightly within 10 m;the construction and excavation of the water transfer system will change the state of the natural seepage field,resulting in a drop in the overall wa-ter level along the water transfer channel,and the local drop can be up to 78 m;the groundwater level of the lower reservoir dam and reservoir has a large difference in depth,and the groundwater gradient is about 30%.Excavation is prone to break the granite body to form local seepage and groundwater discharge.The study results have guiding significance for the groundwater environmental impact assessment of other pumped storage power stations.
pumped storage power stationhydrogeological environmentgroundwater environmentgroundwater environmental protection
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