基于AHP和GIS的重庆市避暑自然适宜性评价

Evaluation of natural environment suitability for the summer resorts in Chongqing based on AHP and GIS

重庆市大部分地区夏季高温炎热,人们要求避暑的愿望强烈。选取气候条件和地形条件为一级指标,气温、相对湿度、风速、降水、日照、海拔、坡度为二级指标,采用层次分析法和GIS空间分析相结合,对重庆市避暑自然适宜性进行评价。结果表明:重庆市适宜避暑区域总面积27 264.48km^2,占重庆市总面积的33.09%,适宜避暑区域面积较多,其中最适宜区域面积12831.24km^2,较适宜区域面积8 180.86km^2,一般适宜区域面积6 252.37km^2;重庆市适宜避暑区域空间分布不均,多分布在海拔较高山区,渝东北和渝东南区域分别占适宜避暑区域总量的50.65%和37.71%,大都市区仅占11.64%。

Because of the hot summer in most areas of Chongqing,people have a strong desire to escape the heat. This article selects climate and geographical conditions as the primary indexes,and then the secondary indexes includes temperature,relative humidity,wind speed,rainfall,sunlight,elevation and gradient. Subsequently,according to the index weight and using the spatial analysis function of GIS,this article makes a comprehensive evaluation of each evaluation indexes to get the distribution map of Chongqing ＇s summer natural environment suitability ultimately. The results prove that：Chongqing＇s suitable summer resorts are relatively abundant with a total area of 27 264. 48km^2 which accounts for 33. 09% of all the Chongqing. Among the rest,the most suitable regions ＇total area is12 831. 24km^2,the relative suitable regions is 8 180. 86km^2 and the common suitable regions is6 252. 37km^2. The suitable summer resorts are mainly in high altitude area and unevenly distributed in space,and mainly concentrate in Northeast Chongqing and Southeast Chongqing which respectively accounts for 50. 65% and 37. 71%,and the metropolitan area only accounts 11. 64%.