地下水是一种宝贵的自然资源,是重要的生态支撑条件与环境要素。人类开发利用地下水资源,在满足了自身生存发展的需要的同时,也改变和破坏了自然环境的平衡。长江三角洲地区地处我国沿海中部、太平洋西岸,扼长江出海口,濒江临海,平原沃土,河湖水网相连,气候温暖湿润,自然环境优 Groundwater is a valuable natural resource and is an important ecological support condition and environmental factor. Human resources exploitation and utilization of groundwater have not only met the needs of their own survival and development, but also changed and destroyed the balance of the natural environment. The Yangtze River Delta is located in the central coast of China, the western coast of the Pacific Ocean, the outcrop of the Yangtze River, the sea near the sea, plain fertile soil, rivers and lakes connected to the network, warm and humid climate, excellent natural environment