复合含水层系统地下水资源评价三维数值模型

Three Dimension Numerical Model of Groundwater Resource Evaluation of Complex Aquifer System

江苏省盐城市地下含水系统为一复合含水层系统,采用真三维模型,将其概化为三度空间上的非均质各向异性。在对模型进行识别、验证的基础上,结合对地面沉降、咸水入侵等地质环境控制的要求,规划、预测了到2020年12月底,第Ⅱ承压含水层、第Ⅲ承压含水层和第Ⅳ承压含水层中的最低地下水位分别恢复到-20 m、-30 m和-40 m时,各含水层中地下水的开采量及地下水的最优开采布局,并预测了未来各含水层地下水位降落漏斗趋于稳定的地下水开采量。

The groundwater system of Yancheng in Jiangsu Province is a compound aquifer system, three dimensional numerical model is applied and deals with it as inhomogeneous anisotropy aquifer in spatial. Based on the validation and verifying of this model, according to the request of geological environment control such as land subsidence, salty water infiltration and so on, the authors plan and forecast the quantity of groundwater exploitation and the optimal exploitation pattern in every aquifer when the lowest groundwater level in confined aquiferⅡ, confined aquifer Ⅲ, and confined aquifer Ⅳ rises to -20m, -30m, and -40m again year by year respectively by the end of Dec 2004, and forecasts the quantity of groundwater exploitation when the groundwater level depression cone in every aquifer trend to reach stabilization.