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自８０年代以来，苏锡常三城市及其外围乡镇长期超量开采第Ⅱ承压水，致使水位持续下降。通过分析第Ⅱ承压含水层的水文地质条件、开采现状以及出现的主要环境地质问题，在没有现行标准可遵循条件下，系统地确定了超采区的划分方法、划分原则和划分标准。即以地下水实际开采量和可开采资源量的比值为基本条件，地面沉降程度和地下水位下降速率为制约条件将区内第Ⅱ承压含水层分布区划分成严重、重度、中度、轻度超采区和未超采区，为苏锡常三市可开采资源量的分配和地下水资源的管理提供了水文地质依据。
Since the 1980s, No.2 pressure water has been overexploited for a long time in the cities of the three cities of Suzhou, Wuxi and Changzhou and the surrounding towns and townships, causing the water level to continue to decline. By analyzing the hydrogeological conditions, mining status and the main environmental geology problems of the confined aquifer under Section II, the classification method, division principle and division standard of overdraft area are systematically determined without the current standards being complied with. That is, the basic conditions of the ratio of the actual exploitation of groundwater to the amount of recoverable resources, the degree of ground subsidence and the rate of decline of groundwater table are the constraints to divide the distribution area of Ⅱ pressure aquifer into severe, moderate, moderate and slight The mining area and the non-overdrawn area provided the hydrogeological basis for the allocation of recoverable resources and the management of groundwater resources in the three municipalities.