摘要
针对我国城市暴雨内涝灾害频发的现象,基于自然灾害风险理论,采用降雨数据、基础地理信息数据、社会经济数据、夜间灯光数据和兴趣点等数据,运用GIS空间分析技术对指标数据进行网格化处理,结合层次分析(Analytic Hierarchy Process,AHP)熵值法,提出针对短期城市暴雨内涝灾害风险评估的过程与方法。以2016年7月6日武汉市暴雨事件为例进行了风险评估并绘制评估结果图。结果表明江岸区、江汉区、硚口区、汉阳区、武昌区以及洪山区西南部分风险较高,而青山区和洪山区东部的风险较低。以实际积涝点与风险评估结果图进行叠加验证,约90%的积涝点处于高风险和较高风险区域,计算结果与实际数据相符。
In order to deal with the frequent occurrence of urban rainstorm waterlogging disasters in China,this study presents a methodology for building a risk assessment model of short term rainstorm and waterlogging disasters,based on GIS spatial gridding technique and AHP-entropy method.By using weather data,geographic information data,socio-economic data,nightlight data and points of interest,the model is built on the basis of the theory of natural disaster risk.The rainstorm and waterlogging disasters in Wuhan on July 6,2016 was taken as an example and a risk map of that day was drawn.The results show that the high risk regions of rainstorm and waterlogging disasters locate in Jiangan,Jianghan,Qiaokou,Hanyang,Wuchang District and southwestern Hongshan District,while the low risk regions are Qingshan District and eastern Hongshan District.By displaying the waterlogging points on the risk division map,it is found that about 90%of waterlogging points locate in high risk regions,which shows that the results are in good agreement with the actual data.
作者
唐海吉
李英冰
张岩
Tang Haiji;Li Yingbing;Zhang Yan(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China)
出处
《城市勘测》
2021年第2期18-23,28,共7页
Urban Geotechnical Investigation & Surveying
基金
国家重点研发计划(2018YFC0807000)。
关键词
暴雨内涝
GIS
AHP熵值法
风险评估
武汉市
rainstorm and waterlogging
GIS
AHP entropy method
risk assessment
Wuhan City
