基于GIS的地面沉降易损性评价  

Vulnerability assessment of land subsidence based on GIS

作　　者：姚晶娟[1] 束龙仓[1] 朱兴贤[2] 武健强[2] 黄币娟[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]江苏省地质调查研究院,南京210029

出　　处：《工程勘察》2011年第6期36-41,共6页Geotechnical Investigation & Surveying

基　　金：苏锡常地区地面沉降监测与风险管理(1212010641202);江苏省"青蓝工程"

摘　　要：地面沉降易损性为承灾体易于受到地面沉降的破坏与损害的程度。根据易损性指标的科学性、可操作性以及可定量化等基本选取依据和地面沉降的损失特征,选择单位面积GDP、建筑密度、人口密度、耕地密度和沉降速率五个易损性指标,另外选取一个修正性指标抗损失能力对易损评价结果进行修正。利用贡献率方法确定了各指标的权重。地面沉降易损性定量表达为各指标的互权重与指标的归一化值的乘积。本文以江苏省锡西—澄南地区为例,对此评价方法进行了应用。运用GIS对研究区进行易损性划分,最终将研究区的易损性划分为高易损性区、中易损性区和低易损性区。The vulnerability of land subsidence refers to the sensitivity of hazard bearing body to the damage of land subsidence.On the basis of the scientific features,the maneuverability,and the quantification of vulnerability indexes and on the loss features from land subsidence,the five vulnerability indexes such as the GDP per unit area,building density,population density,plowland density and subsidence rate are selected,and the vulnerability assessment is modified by choosing the index of anti-loss capability.The weight of all the indexes is discussed by contribution rate method,and the quantity of land subsidence vulnerability is represented as the final product of the weight of each index and index normalized value.The method is applied to Xixi-Chengnan area in Jiangsu province.The vulnerability zoning of the research area are finished by using the said method based on GIS system,and the vulnerability in the areas is divided into the high vulnerability,middle vulnerability and low vulnerability.

关 键 词：易损性评价 指标体系 评价方法 锡西—澄南地区 

分 类 号：TU478[建筑科学—结构工程]