干旱区研究2025，Vol.42Issue(4)：589-599,11.DOI:10.13866/j.azr.2025.04.02
基于TVDI的新疆地区干旱时空变化特征
Spatiotemporal variations in drought conditions in Xinjiang based on TVDI
摘要
Abstract
Drought is a significant factor affecting the ecological stability and agricultural productivity of Xinji-ang.Timely drought monitoring is crucial for ensuring food security in the region.This study constructed the TV-DI based on the Land Surface Temperature and the Normalized Difference Vegetation Index derived from the MODIS data between 2001 and 2020.This study explores the spatial distribution characteristics of drought in Xinjiang and its potential future evolution trends.The results indicate that:(1)On average,78.7%of the region experiences drought of varying degrees,with a mean TVDI of 0.58 over the past two decades,suggesting a gener-ally mild drought.(2)Future drought conditions in Xinjiang are expected to ease,with a TVDI decline rate of 0.0017 per year,and 81%of the region showing a trend toward increasing moisture levels.(3)TVDI correlates weakly with meteorological factors but strongly with elevation.When the degree of drought is relatively high,un-used land contributes significantly to the TVDI,whereas grassland contributes significantly to the TVDI when the degree of drought is relatively low.Additionally,the unused land area correlates positively with drought,whereas forest and grassland areas correlate negatively with drought.These findings highlight the importance of reducing unused land and expanding forest and grassland areas to mitigate drought conditions.关键词
TVDI/干旱/趋势分析/新疆Key words
TVDI/drought/trend analysis/Xinjiang引用本文复制引用
李晓鹏,李康,雷双,贾富贵,徐静..基于TVDI的新疆地区干旱时空变化特征[J].干旱区研究,2025,42(4):589-599,11.基金项目
甘肃省科技计划项目(自然科学基金)(20JR5RA202,24JRRA1003) （自然科学基金）
甘肃省教育厅青年博士支持项目(2025QB-055) （2025QB-055）
甘肃省陇原青年人才创新创业项目(2021LQGR59) （2021LQGR59）
