长江科学院院报2024，Vol.41Issue(3)：153-159,165,8.DOI:10.11988/ckyyb.20230196
基于SPI和VHI的长江中下游地区干旱时空特征分析
Spatial-temporal Characteristics of Historical Drought in the Middle and Lower Reaches of Yangtze River Based on Standardized Precipitation Index and Vegetation Health Idex
摘要
Abstract
In the middle and lower reaches of the Yangtze River,drought has had serious impacts on economic de-velopment with increasing frequency,intensity,disaster scope and duration over the past six decades.In this study,60-year historical precipitation dataset and 40-year remote sensing dataset were constructed to calculate the meteoro-logical drought and agricultural drought indexes.The drought monitoring index series curves were established based on standardized precipitation index(SPI)and vegetation health index(VHI).The spatial distribution,seasonal distribution,occurrence frequency and other indicators of drought were analyzed to explore the drought's spatial-temporal differentiation laws.The results show that drought events in the study area are notably season-dependent,with high frequency in spring and summer,and low frequency in autumn and winter.Droughts in the north and west part were more serious than those in the south and east part.Northern Hubei and southern Hunan were prone to suf-fer from droughts.关键词
干旱/时空特征/SPI/VHI/长江中下游地区Key words
drought/spatial-temporal characteristics/SPI/VHI/middle and lower reaches of Yangtze River分类
天文与地球科学引用本文复制引用
向大享,姜莹,陈喆,李喆..基于SPI和VHI的长江中下游地区干旱时空特征分析[J].长江科学院院报,2024,41(3):153-159,165,8.基金项目
国家重点研发专项(2021YFC3000205) （2021YFC3000205）
水利部重大科技项目(SKR-2022003) （SKR-2022003）
