Spatial-temporal Characteristics of Historical Drought in the Middle and Lower Reaches of Yangtze River Based on Standardized Precipitation Index and Vegetation Health Idex
XIANG Da-xiang, JIANG Ying, CHEN Zhe, LI Zhe
Journal of Yangtze River Scientific Research Institute . 2024, (3): 153 -159 .  DOI: 10.11988/ckyyb.20230196