关键词: 灰岩承压水;涌水;水温;同位素;溪洛渡水电站;金沙江;

Abstract: Since the Xiluodu Hydropower Station impounded for power generation, valley deformation occurred in a certain range of upstream and downstream of the dam site.The domestic scientific research team believes that the change of hydrogeological conditions in the dam site area after impoundment is one of the important factors causing valley deformation.Based on a large amount basic data collected from the special research work of temperature field and seepage field, we analyzed the limestone confined water hydrogeological characteristics before and after impoundment of the Xiluodu Hydropower Station from four aspects, including temperature, water level, water quality and isotope.Preliminary analysis showed that there was no obvious change in the water temperature of the limestone confined water after impoundment, but the water level of the confined water greatly increased.A small amount of reservoir water infiltrated into the limestone confined water, thus causing a slight change in the quality of confined water.The limestone confined water is still recharged by atmospheric rainfall in the limestone exposed area around the regional basin, and discharged to the Jinsha River through the deep circulation.

Key words: limestone confined water; gushing water; water temperature; isotope; Xiluodu Hydropower Station; Jinsha River;