地下水壅高计算研究

Study on Calculation of Heading up of Ground Water

从云南省三个修建在碳酸盐岩地区的水库入手,研究了水库与邻谷之间河间地块的地下水分水岭位置和水位变化,具有建库前地下水位高于河水、建库后地下水位低于设计蓄水位的特点。研究了分水岭地带碳酸盐岩的岩溶发育规律和岩溶形态,提出了地下水壅高计算的边界条件和计算的公式,根据地下水的壅高计算成果得出了水库蓄水后不存在渗漏的结论,地下水位壅高计算值与实测值进行了比较,二者基本一致,说明了计算的可靠性。

This paper,taking three reservoirs built in carbonate rock areas in Yunnan for example,studies the position and level of ground water divide in the area between reservoirs and adjacent valleys,and discovers that the ground water level is higher than ever and lower than designed pool level after construction.By considering the karst development regularity and shape of carbonate rocks in water divide areas,a formula and boundary conditions for calculating the heading up of ground water are given.According to this formula,a conclusion that there is no leakage problem existing for the reservoir after filling is achieved.The calculated value is reliable and approximately agrees with the measured one.