武都区高温时空演变特征及灾害风险区划

Time-space Evolution Characteristics and Risk Zonation of High Temperature in Wudu District

分析武都区1971——2010年高温资料得出,武都区高温日数年平均为21d,集中出现在5——9月;从高温日数的年际变化来看,高温日数呈现明显的增多趋势。结合人口、GDP、耕地比等资料,利用GIS技术分析得出,武都区高温危险性等级和高温灾害风险随着海拔高度由低到高递减;白龙江流域和东南部海拔1100m以下浅山河谷区最高,1600m以上高山地区最低,多数年份不会出现高温天气。

Based on high temperature data of Wudu District from 1971 to 2010, annual mean high-temperature days in Wudu District were concluded as 21, concentrating in May, June, July, August and September. From the per- spective of annual variation, high-tem- perature days in Wudu District show an increasing trend. Combined with popula- tion, GDP, arable land ratio and GIS techniques, level and disastrous conse- quences of high temperature in Wudu District were found declining with the raising elevation. Specifically, valleys in such low hilly areas with an elevation be- low 1 100 m as the Bailong River basin and southeast Wudu had the highest risk level and worst disastrous consequences, while mountainous areas with an eleva- tion above 1 600 m had the lowest risk level and least disastrous consequences, and these areas had no high-temperature days in most of the study years.