由于地面沉降,矗立于古都西安的唐代建筑大雁塔倾斜已达上千毫米;由于地面沉降,天津市区内涝基本无法从海河排出;由于地面沉降,华北一些地区地下水循环系统平衡遭到破坏,地下水质恶化。事实上,我国地 Due to the land subsidence, the tower of the Big Wild Goose Pagoda in the Tang Dynasty that was erected in the ancient capital of Xi'an has already reached a slope of one thousand millimeters. Because of the land subsidence, the waterlogging in the urban area of ​​Tianjin can not be basically discharged from the Haihe River; the balance of the groundwater circulation system in some areas of North China is destroyed due to land subsidence, The quality of underground water is deteriorating. In fact, our country