Research on Seepage Control of Jurong Pumped Storage Hydroelectric Power Station

• Published in: Water (Basel) Vol. 14; no. 2; p. 141
• Main Authors: Miao, Kehan, Bai, Zhenglin, Huang, Yong, Huang, Yunlong, Su, Yue
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.01.2022
• Subjects: Anisotropy; China; Concrete; Dams; Drainage systems; Fractures; Geology; Groundwater; Groundwater flow; Groundwater reservoirs; Groundwater storage; Heterogeneity; hydraulic conductivity tensor; Hydraulics; Hydroelectric plants; Hydroelectric power; Hydroelectric power plants; Hydroelectric power stations; Hydrogeology; Leakage; Methods; Permeability; Planes; Power plants; Pumped storage; pumped storage power station; Reservoir operation; Reservoir storage; Rocks; Seepage control; Storage reservoirs; structure surface control inversion method; Three dimensional flow; Underground storage; Water; Water flow; Water-power; China
• ISSN: 2073-4441; 2073-4441
• DOI: 10.3390/w14020141

Based on the geological and hydrogeological conditions of the Jurong Pumped Storage Hydroelectric Power Station (JPSHP), a 3D groundwater flow model was developed in the power station area, which took into account the heterogeneity and anisotropy of fractured rocks. A control inversion method for fractured rock structural planes was proposed, where larger-scale fractures were used as water-conducting media and the relatively intact rock matrix was used as water-storage media. A statistical method was used to obtain the geometric parameter values of the structural planes, so as to obtain the hydraulic conductivity tensor of the fractured rocks. Combining the impermeable drainage systems of the upper storage reservoir, underground powerhouse and lower storage reservoir, the 3D groundwater seepage field in the study area was predicted using the calibrated model. The leakage amounts of the upper storage reservoir, powerhouse and lower storage reservoir were 710.48 m3/d, 969.95 m3/d and 1657.55 m3/d, respectively. The leakage changes of the upper storage reservoir, powerhouse and lower storage reservoir were discussed under the partial and full failure of the anti-seepage system. The research results provide a scientific basis for the seepage control of the power station, and it is recommended to strengthen the seepage control of the upper and lower storage reservoirs and the underground powerhouse to avoid excessive leakage and affect the efficiency of the reservoir operation.