湛江冯村垃圾场对中深层承压水污染的可能性及其防治

根据湛江冯村垃圾场所处的原生及次生地质环境条件,采用水文地质学及地下水动力学的理论与方法,对冯村垃圾场潜在污染中深层承压水的可能性、危害性及防治对策进行初步探讨。结果表明:冯村垃圾场建于地下水循环系统的补给区,地形切割强烈,包气带自净能力差,浅层潜水与中深层承压水之间的水头差较大,存在污染中深层承压水的可能性。建议贯彻以防为主、防治结合的原则,禁止在冯村一带再建垃圾填埋场,并设立防治分区,建立动态监测网络系统及地下水管理模型。

Possibility and control measures of confined water pollution in middle-deep layer of Fengcun landfill in Zhanjiang City

Based on the primary and secondary geological environment conditions of the Fengcun landfill in Zhanjiang,the theory of hydrogeology and dynamics of groundwater were used to study the potential possibility and harmfulness of the confined water pollution in the middle-deep layer of the landfill and its control strategies.The results showed that the Fengcun landfill was built in the recharge areas of groundwater circulatory systems,the terrain alongside was cut significantly,and the self-purification capacity of the aeration zone was poor.Moreover,the difference in hydrostatic head between the phreatic water in the shallow layer and the confined water in the middle-deep layer was large.Therefore, there exists a possibility that the confined water in the middle-deep layer would be polluted.Prevention combined with treatment should be insisted upon.Some measures,such as forbidding building of the landfill in Fengcun,establishing control districts,the dynamic monitoring network system,and groundwater management models,must be taken.