Research on Seepage Control of Jurong Pumped Storage Hydroelectric Power Station

Abstract

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.

Application of the Tracer Test in a Hydrogeological Survey for a Pumped Storage Power Station

“…It will play an important role in maintaining the safety, economy, and stable operation of the power grid. The normal water level of the upper reservoir is 646 m and the dead water level is 609 m. The regulating capacity of the reservoir is 10.92 million m 3 . The catchment area of the dam site is 1.37 km 2 .…”

“…This is particularly true for basins with inadequate seepage prevention capabilities, especially those characterized by karst formations and complex geological conditions. Consequently, the identification of leakage passages beneath the reservoir basin, assessment of the seepage pathways in fractured networks, analysis of the underground hydraulic connections, and the development of an effective seepage prevention strategy are critical for ensuring judicious investment management [2,3]. Comprehensive investigation of the complex hydrogeological conditions for the reservoir, determination of groundwater hydraulic connections, and identification of potential leakage passages are essential.…”

Permeability Tests and Numerical Simulation of Argillaceous Dolomite in the Jurong Pumped-Storage Power Station, China

“…Taking argillaceous dolomite in the JPSPS as the research object, the power station is located in Jurong City, Jiangsu Province, about 26 km from Jurong city, and 65 km from Nanjing City, China [25]. The total installed capacity is 1350 MW.…”