水资源匮乏已成为全球性问题。在我国亦然,其中以城市用水紧张问题尤为突出。据资料统计,我国严重缺水城市竟达40多座。社会的发展,人民生活水平不断提高。对水的需求量日益增长。以开采地下水为主要水源的城市,矛盾更加尖锐,补给量远小于开采量。为满足日需水量,掠夺式的开采地下水,颇有竭泽而渔之热。由于地下水位急剧下降,严重威胁地面建筑物的安危,地面下陷、裂缝,建筑物受损。无一不与地下水位下降有关。而城市建筑的覆盖又截断一定数量地下水源的补给,进而加大河道洪峰流量。解决城市用水,以跨流域引水是一种措施,但往往工程艰巨,投资浩大,影 Water scarcity has become a global problem. In our country, too, the problem of urban water shortage is particularly prominent. According to statistics, as many as 40 water-stressed cities in China. The development of society and the continuous improvement of people’s living standards. Demand for water is on the rise. In cities where groundwater is the main source of water, conflicts are sharper and the amount of recharge is much smaller than the amount extracted. In order to meet the daily water demand, predatory exploitation of groundwater, quite exhausted Ze Zeyu heat. Due to the drastic drop in groundwater level, the safety of ground buildings is seriously threatened, ground subsidence, cracks and buildings are damaged. All are related to the drop of groundwater level. The coverage of urban construction cut off a certain amount of groundwater recharge, thereby increasing flood peak flow. It is a measure to solve the problems of urban water use and water diversion across the river basins, but it is often difficult to undertake projects and vast investment.