江苏省沿海地区地面沉降风险评价

发布时间：2018-05-17 18:56

本文选题：江苏省 + 沿海地区　；参考：《地质科技情报》2017年02期

【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。
[Abstract]:By using the analytic hierarchy process (AHP)-comprehensive index method, the accumulative land subsidence and the land subsidence rate in the coastal areas of Jiangsu Province from 1985 to 2014 were analyzed in order to form the regional land subsidence hazard zoning map, and select the land height. The population density is GDP.The fixed investment of highway and unit area is used as the index to draw the vulnerability zoning map. Finally, the risk assessment of land subsidence in Jiangsu coastal area is carried out by using the product risk model. The evaluation results show that the high risk area of land subsidence in Jiangsu coastal area accounts for 18.71% of the total area, mainly concentrated in Nantong City, followed by Jianhu County, Sheyang County, Funing County, Xiangshui County, Urban area and Guannan County of Lianyungang City. The middle risk area is mainly distributed around the high risk area, accounting for 33.6990% of the total area of the study area, and the low risk area accounts for 47.60% of the total area. Based on the results of risk assessment of land subsidence, combined with the present situation of land subsidence and existing protective measures, the corresponding prevention measures were put forward.
【作者单位】：中国地质大学(武汉)环境学院;
【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)
【分类号】：P642.26

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