天津平原地面沉降条件下的深层地下水资源组成

Composition of groundwater resources in deep-seated aquifers under the condition of land subsidence in Tianjin Plain

根据天津平原地面沉降监测结果,采用水量均衡法,计算出深层地下水开采量中,浅层地下水越流补给量占38 2%,粘土性压密释水量占41 3%,弹性释水量占5 6%,侧向流入量占14 9%。在控制地面沉降的条件下,深层地下水持续利用的对策是调整开采三维布局,适度开发利用浅层地下水对深层地下水的越流补给。

On the basis of the monitoring results of land subsidence and calculation of deep groundwater resources by using water balance method, it is shown that the leakage recharge from its upper shallow groundwater account for approximately 38.2%, drainage of the clay layers, about 41.3%, water release from the aquifers, around 5.6%, and lateral inflow, some 14.9%, of the total groundwater resources. In order to control the land subsidence, adjusting three dimensional exploitive positions and moderately utilizing the leakage recharge from its upper shallow groundwater play a key role in realizing the sustainable development of deep groundwater resources in this area.