地下水是我国特别是北方缺水地区的重要水源,与地表水供水相比,它有如下优点:具有四季不变的水温,良好的水质,开采简易。但有些地区由于开采强度远远超过地下水的补给,致使地下水的循环遭到了破坏,因而给当地造成了危害。地面下沉、坍陷大量超采地下水,使地下水位大幅度下降以致形成漏斗,漏斗上方地层中,原来被水占据的空间就变成了空隙,在地面巨大压力下, Groundwater is an important source of water in our country, especially in the northern water-scarce regions. Compared with surface water supply, groundwater has the following advantages: it has the same water temperature, good water quality and easy exploitation. However, in some areas, the circulation of groundwater has been damaged due to the fact that the intensity of exploitation far exceeds that of groundwater, thus causing harm to the local community. Ground subsidence, a large number of over-exploitation of groundwater collapse, so that a substantial decline in the groundwater level resulting in funnel, funnel above strata, the original space occupied by water becomes a gap in the ground under enormous pressure,