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本刊上期介绍了我国主要的地质灾害——崩塌、滑坡、泥石流和地面塌陷的情况,本期对地面沉降等地质灾害介绍如下: 地面沉降和地裂缝地面沉降是我国平原和滨海地区广泛发育的地质灾害。从成因上看,绝大多数是由于超量开采地下水所致,有些地区还有其他成因,如地壳运动、石油开采等,但同时都伴随有地下水过量开采的因素。地面沉降、地裂缝在50年代初期,仅在个别省和城市发现,至90年代,上海、天津、江苏、浙江、陕西等16个省(自治区、直辖市),共46个城市或地区发生了地面沉降地质灾害,沉降总面积达4.87万平方公里。从发展趋势上看,以
This issue introduces the main geological disasters in our country - collapse, landslide, debris flow and ground subsidence situation, this issue of geological disasters such as land subsidence are as follows: Ground subsidence and ground fissure ground subsidence is widely developed in China’s plains and coastal areas Geological disaster. In genesis, the overwhelming majority are caused by the over-exploitation of groundwater. There are other causes in some areas, such as crustal movement and oil exploration, but at the same time they are all accompanied by over-exploitation of groundwater. Ground subsidence and ground fissures were discovered in only the individual provinces and cities in the early 1950s. By the 1990s, ground surfaces occurred in 46 cities or regions in 16 provinces (autonomous regions and municipalities) such as Shanghai, Tianjin, Jiangsu, Zhejiang and Shaanxi Settlement of geological disasters, the total area of 48,700 square kilometers of settlement. From the development trend of view