摘要
盐城市是江苏省苏北沿海的新兴城市,区内从上至下分布有供水意义的含水层分别为中更新统第Ⅱ承压含水层,下更新统第Ⅲ承压含水层和中、上新统第Ⅳ承压含水层,其间以弱含水的粘性土层相分隔,并发生强烈的水力联系。本文将采用三维数值模型,在模型识别、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,以2003年的地下水开采布局为基础,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-20m、-30m和-40m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。
Yancheng is a developing coastal city in the north of Jiangsu Province. The aquifers, which can supply groundwater, are classified as middle Pleistocene confined aquiferⅡ, lower Pleistocene confined aquiferⅢ, middle and upper Pliocene confined aquiferlV in the city. These aquifers are divided by the clays which are of weak permeability, but there are intensively hydraulic relation among these aquifers. Based on the validation and verifying of this model, and the request of geology environment control such as land subsidence, salty water infiltration and so on, this paper uses three dimension numerical model to plan and forecast the quantity of groundwater exploitation and the optimal exploitation pattern in every aquifer when the lowest groundwater levels in confined aquiferⅡ, confined aquiferⅢ, and confined aquiferⅣ rise to -20m, -30m, and -40m again year after year respectively by the end of Dec 2004, and forecast the quantity of groundwater exploitation when the groundwater level depression cone in every aquifer trends to reach stabilization.
出处
《资源调查与环境》
2005年第1期54-59,共6页
Resources Survey & Environment
关键词
盐城市
地下水资源
评价
Yancheng
groundwater resource
evaluation
