【摘要】 通过地下水动态变化资料,采用数值方法反求出水文地质参数,并建立断裂构造、地下水迳流和岩溶塌陷之间的关系。由于地下水位变化过程是表现不同地段地下迳流补给和不同输水能力的特性,同时也综合地反映了水文地质条件。按照地下水二维非均质各向异性非稳定运动规律,用有限单元法确定了旱季及雨季的参数,并对这些参数用多年资料作了校验。 通过模拟计算,发现了一条北西西向断裂的存在,它控制着区内地下迳流和岩溶塌陷的形成,塌陷主要沿着张扭性断裂的方向延伸,尤在断裂交汇部位为甚。塌陷于1982年发现,预测发生在离水源地大约1100米及1500米处的塌陷,已于1983年全部得以证实。 该例表明,预报塌陷规律是可能的,它对断裂构造分析,防止塌陷,保护环境均有重要意义。更多还原

【Abstract】 Numerical method is used in the inversion of hydrogeological parameters by using the data on groundwater fluctuation, and thus the establishment of the relationship between faults, ground-water flow, and land collapse in karst areas. As the fluctuation of groundwater level represents the characteristics of the recharge of groundwater flow in various sections and transmissibility of different media in karst areas and at the same timeit reflects the hydrogeological conditions, the parameters for dry and rainy seasons were determined by means of finite element method according to the law of two dimensional unsteady flow of inhomogeneity and anisot-ropy.The parameters were finally checked by data obtained from long-term observation.The result of simulation indicates the existence of a NWW fault that controle the groundwater flow and the land collapse in the study area of karst development. The collapse took place mainly along the extension of a tensileshearing fracture, particularly at the intersecting parts of faults. A collapse took place in 1982, from which it was forecasted that land subsidence would occur at two localities about 1100 and 1500 meters distant from the water source respectively. It was verified later in 1983The example demonstrates that it is possible to forecast land collapse and subsidence according to the law of their occurrence, which is of importance to the distribution of constructions, prevention of land subsidence and protection of environment.更多还原