宁波市地下水环境特征与保护对策

Characteristics and protection countermeasures of the groundwater environment in Ningbo city

地下水是水资源的重要组成部分,在保障城乡居民生活用水、支持社会经济发展、维持生态平衡等方面具有十分重要的作用。本文按照不同的水文地质单元开展河谷孔隙潜水、平原区深层承压水和基岩裂隙水的现状调查并对近五年动态监测进行综合评价。评价结果显示宁波市地下水总体状况稳定,但也存在不同程度的污染。其中河谷孔隙潜水状况良好,水质II类的占82%;平原区承压水和基岩裂隙水已出现一定程度污染,水质大多为IV类,个别为V类。最后结合地下水污染途径和危害进行分析,提出地下水环境保护对策,为地下水资源的有效管理与合理开发提供技术依据。

Groundwater is an important component of water resources. It plays an important role in protecting urban and rural residents’ living water, supporting social and economic development, and maintaining ecological balance. According to different hydrogeological units, an investigation of valley pore phreatic water, plain confned water, and bedrock fssure water is performed, and a comprehensive evaluation of dynamic monitoring in the fve most recent years is presented. Results show that, overall, groundwater is stable in Ningbo city, with varying degrees of pollution. The valley pore phreatic water is in good condition, with the water quality class II accounting for 82%. The plain confned water and bedrock fssure waters have been somewhat polluted, and most is water quality class IV, while some is class V. Finally, mechanisms and impacts of groundwater pollution are analyzed and groundwater protection measures are put forward that provide a technical basis for the effective management and rational development of groundwater resources.