江苏省沿海地区地面沉降风险评价  

Risk Evaluation of Land Subsidence in Coastal Areas of Jiangsu Province

作　　者：胡喜梅[1] 马传明[1] 邓波[1] 张晶晶[1] 

机构地区：[1]中国地质大学(武汉)环境学院,武汉430074

出　　处：《地质科技情报》2017年第2期222-228,共7页Geological Science and Technology Information

基　　金："十二五"国家科技支撑计划项目(2012BAJ11B04);大学生自主创新资助项目(2016-2017)

摘　　要：利用层次分析-综合指数法,对1985-2014年江苏省沿海地区累计地面沉降量及2014年地面沉降速率进行叠加分析,形成地区地面沉降危险性分区图;并选取地面高程、人口密度、GDP、公路和单位面积固定投资额作为指标,绘制易损性分区图;最后采用乘积法风险模型对江苏沿海地区开展地面沉降风险评价。评价结果显示:江苏沿海地区地面沉降高风险区占总面积18.71%,主要集中于南通市,其次分布于盐城市的建湖县、射阳县、阜宁县、响水县、市区及连云港市的灌南县等地;中等风险区主要围绕着高风险区分布,占研究区总面积的33.69%,;低风险区占总面积的47.60%。以地面沉降风险评价结果为基础,结合地面沉降现状及已有的防护措施,有甄别地提出相应防治措施。Carrying out risk evaluation of the land subsidence in the coastal area of Jiangsu Province, which can provide service for the sustainable development of the region＇s economic construction and is also in fa- vour of the local geological environment. In the essay, the analytic hierarchy-comprehensive index method was used to take overlay analysis between cumulative surface subsidence volume（from 1985 to 2014） and rate of land subsidence（in 2014） in order to form the map of regional land subsidence hazardous zoning . Then, using this method, the ground elevation, density of population, GDP, roads and fixed investment was selected as the indexes to draw the vulnerability zoning map. Finally, the product method was used to carry out the risk evaluation of the land subsidence in coastal area of Jiangsu Province. The evaluation re- sults show that. High-risk area accounts for 18.71% of total area and most of it concentrats in Nantong City, secondly distributs in County of Jianhu, Sheyang, Funing, Xiangshui, town of Yancheng City and Guannan County of Lianyungang City. High-risk area is almost surrounded by medium-risk area, which ac- counts for 33.69% of the total area. The other area is low-risk and which accounts for 47.60%. On the ba- sis of the results and taking the present situation of land subsidence and the existing protection measures into consideration,several targeted suggestions were given on preventing and controlling the land subsid- ence of each risk area.

关 键 词：江苏省 沿海地区 地面沉降 风险评价 

分 类 号：P642.26[天文地球—工程地质学]