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经过对 30余年水位观测资料的整理和分析 ,在厘定水文地质模型的基础上 ,运用数理统计原理 ,获得了坝基地下水渗流特征及其变化趋势的基本认识 ,这包括库、管水位关系 ,代表断面测压管平均位势过程线 ,特定库水位时测压管管水位过程线 ,坝基渗流量变化。研究表明 ,上游铺盖与截水槽结合下游排水的防渗体系有效地控制了坝基水位 ,这为水库投入正常高水位(319.5 ,32 7.5 ,331.8m)的运行提供了详实的理论依据。
After finishing the data analysis of the observed water level for more than 30 years, based on the determination of hydrogeological model, the basic understanding of the characteristics and trends of groundwater seepage in the dam foundation has been obtained by applying the principles of mathematical statistics. This includes the relationship between reservoir and pipe water level, The average potential of piezometric process line, the specific level of the piezometric pipe water level process line, dam foundation seepage flow changes. The results show that the seepage control system of downstream drainage combined with intercepting trough can effectively control the water level of dam foundation, which provides a detailed theoretical basis for the operation of reservoirs with normal high water level (319.5, 32.55, 331.8m).