南水北调与水利科技2017，Vol.15Issue(1)：49-54,131,7.DOI:10.13476/j.cnki.nsbdqk.2017.01.009
辽西北地区干旱时空变化特征分析
Spatial and temporal variation characteristics of drought in northwestern Liaoning Province
摘要
Abstract
Based on the basic data of 1971-2010 at 14 meteorological stations in northwestern Liaoning province,this paper selected four indexes (the precipitation anomaly,number of consecutive days without rain,river runoff anomaly,and relative humidity),and obtained the comprehensive drought level characteristic value of northwestern Liaoning province using the variable fuzzy evaluation method.Then it used the linear trend estimation method and Mann-Kendall test method to analyze the trend of drought and used the IDW method to analyze the spatial variation characteristics of comprehensive drought.The results show that the drought is growing significantly more serious.During 1971-1980,the drought was mostly mild,but was aggravated after the 1980s,and became the most serious during 1981-1990.The period of 1980-2010 witnessed a high incidence of severe droughts but few extremely severe droughts.The drought was more serious and was aggravated with time in the northeast and southwest of northwestern Liaoning province,but was less serious in the central region.Therefore,drought resistance and disaster reduction efforts should be mainly concentrated on the northeast and southwest of the region.关键词
辽西北/综合干旱/可变模糊/时空变化/级别特征值Key words
northwestern Liaoning province/comprehensive drought/variable fuzzy/temporal and spatial variation/the level characteristic value分类
农业科技引用本文复制引用
曹永强,张亮亮,朱明明..辽西北地区干旱时空变化特征分析[J].南水北调与水利科技,2017,15(1):49-54,131,7.基金项目
国家自然科学基金(51279072) （51279072）
中国气象局干旱气候变化与减灾重点实验室开放基金(IAM201511)National Natrural Science Foundation of China (51279072) （IAM201511）
Open Fund of Drought Climate Change and Disaster Reduction Key Laboratory,China Meteorological Administration(IAM201511) （IAM201511）
