干旱区地理2024，Vol.47Issue(11)：1828-1840,13.DOI:10.12118/j.issn.1000-6060.2023.609
1990-2020年新疆伊犁地区雪灾时空分布特征及其影响评估
Spatiotemporal distribution characteristics and impact assessment of snow disasters in the Ili region of Xinjiang from 1990 to 2020
摘要
Abstract
The snow disasters in the Ili region of Xinjiang,China,have led to significant economic and social im-pacts,mainly through reduced agricultural production and ecosystem damage.To quantify and evaluate the im-pact of snow disasters in this region,this study analyzed 95 snow disaster events that occurred between 1990 and 2020.A disaster loss index was calculated using selected indicators,dimensionless processing,and weight assign-ment.The severity of snow disasters was categorized into four levels(mild,moderate,severe,and extreme)using the percentile method.The key findings are as follows:(1)Snow disasters in the Ili region exhibited a bimodal distribution,with peak occurrences in November and January-February,aligning with the region's seasonal cli-matic characteristics.Since 2014,the frequency of snow disasters has notably decreased.(2)Mild snow disasters were the most frequent,accounting for 49.4%of events,while moderate,severe,and extreme snow disasters rep-resented 23.2%,24.2%,and 5.0%,respectively.(3)The most severe disaster losses were observed in Nilka Coun-ty,followed by Xinyuan County and Yining County,whereas Zhaosu County was the least affected.(4)Key mete-orological factors influencing snow disasters,including cumulative snowfall,maximum snow depth,minimum temperature,and snowfall duration,displayed regional variations.Areas with high snow disaster incidence had higher mean values of maximum snow depth compared to other regions.This study provides a scientific founda-tion for risk assessment and management of snow disasters in the Ili region.关键词
雪灾/灾损指数/强度和次数/空间格局/伊犁地区Key words
snow disasters/disaster loss index/intensity and frequency/spatial patterns/Ili region引用本文复制引用
火红,刘艳,买吾拉夏·木巴热克..1990-2020年新疆伊犁地区雪灾时空分布特征及其影响评估[J].干旱区地理,2024,47(11):1828-1840,13.基金项目
第三次新疆综合科学考察项目(2022xjkk0602)资助 （2022xjkk0602）
