水利水电技术2018，Vol.49Issue(5)：84-89,6.DOI:10.13928/j.cnki.wrahe.2018.05.013
基于模糊综合评价法的大同市山洪灾害风险评价
Fuzzy comprehensive evaluation method-based risk assessment on mountain torrent disaster in Datong City
摘要
Abstract
Aiming at the insufficiency of the study on the risk assessment of the mountain torrent disaster in Datong City,a relevant risk assessment is made in combination with the advantages of the three methods,i.e.fuzzy comprehensive evaluation method,analytic hierarchy process and GIS.In accordance with the geographical environment and regional survey of Datong City,9 influencing factors,i.e.rainfall intensity,frequency of heavy rainfall,relief amplitude,river network density,vegetation coverage,population density,GDP density,farmland area ratio and mining area ratio,are selected for building up the factor set,and then descending semi-trapezoid distribution function is chosen to calculate the membership degree,while the weights of all the factors are calculated with analytic hierarchy process.On the basis of raster data,the process of the risk assessment is finished with the spatial analysis function of GIS.The assessment result shows that the proportions of the lowest risk area,lower risk area,medium risk area,the higher risk area and the extremely high risk area within the total area of the city are 36.86％,32.43％,14.69％,8.77％ and 7.25％ respectively.Through the verification on the assessment result made with the historical data of mountain torrent disaster therein,it is indicated that the assessment result is basically coincided with the local actual risk level,thus can be taken as the referential basis for the mountain torrent disaster control and management of Datong City.关键词
山洪灾害/GIS/模糊综合评价法/层次分析法/风险评价Key words
mountain torrent disaster/GIS, fuzzy comprehensive evaluation method/AHP/risk assessment分类
大气科学引用本文复制引用
敬双怡,莘明亮,于玲红,李卫平,任波,黄立志..基于模糊综合评价法的大同市山洪灾害风险评价[J].水利水电技术,2018,49(5):84-89,6.基金项目
国家自然科学基金项目(41263010) （41263010）
内蒙古包头黄河湿地生态系统国家定位观测研究站运行补助项目(2015-LYPT-DW-037) （2015-LYPT-DW-037）
