Research on the temporal and spatial variation characteristics of drought in the hexi corridor region based on TVDI

doi:10.1117/12.3059744

	Research on the temporal and spatial variation characteristics of drought in the hexi corridor region based on TVDI
	Li, Xiaopeng; Li, Kang
	2025
会议名称	3rd International Conference on Geographic Information and Remote Sensing Technology, GIRST 2024
会议录名称	Proceedings of SPIE - The International Society for Optical Engineering
卷号	13551
会议日期	November 29, 2024 - December 1, 2024
会议地点	Rome, Italy
会议录编者/会议主办者	Academic Exchange Information Centre (AEIC)
出版者	SPIE
摘要	This study is based on Landsat 8 data from 2013 to 2023. By fitting Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI) data, we constructed the NDVI-LST feature space to obtain Temperature-Vegetation Drought Index (TVDI) data for the Hexi Corridor region over the 11-year period. We analyzed the temporal and spatial distribution evolution characteristics of drought in the Hexi Corridor and explored future evolution trends using the Theil-Sen Median trend analysis method and the Mann-Kendall test. The results indicate that:(1) From 2013 to 2023, the average TVDI in the Hexi Corridor region was 0.61, indicating an overall moderate drought level. (2) The annual average TVDI values exhibited significant fluctuations and a slow-increasing trend, showing a gradual intensification of drought phenomena. (3) In 87.63% of the area, future land drought conditions remain stable; 6.94% of the area is becoming progressively drier, while 5.43% is becoming increasingly wet. © 2025 SPIE.
关键词	Hexi corridor Land surface temperature LANDSAT Normalized difference vegetation index Region-based Temperature-vegetation drought index Temporal and spatial variation Trend analysis Variation characteristics Vegetation drought indices
DOI	10.1117/12.3059744
收录类别	EI
语种	英语
EI入藏号	20251718303966
EI主题词	Miocene
EI分类号	481.1 Geology
原始文献类型	Conference article (CA)
文献类型	会议论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/39152
专题	农林经济管理学院
通讯作者	Li, Xiaopeng
作者单位	School of Agricultural and Forestry Economics and Management, Lanzhou University of Finance and Economics, Lanzhou, China
通讯作者单位	农林经济管理学院
推荐引用方式 GB/T 7714	Li, Xiaopeng,Li, Kang. Research on the temporal and spatial variation characteristics of drought in the hexi corridor region based on TVDI[C]//Academic Exchange Information Centre (AEIC):SPIE,2025.