水力发电学报2024，Vol.43Issue(4)：34-49,16.DOI:10.11660/slfdxb.20240404
长江流域旱涝急转演变特征及其社会经济暴露度
Evolution characteristics of drought-flood abrupt alternation events in Yangtze River basin and its socio-economic exposure
摘要
Abstract
Drought-flood abrupt alternation(DFAA)refers to a rapid transformation between droughts and floods,which poses great threats to agricultural production and human security.This study,based on the monthly scale magnitude index of DFAA,analyzes four types of historical and future DFAA events in the Yangtze River basin.A time-varying function for the magnitude of DFAA is constructed using a sliding window approach,revealing the future changes in DFAA risk.Shared socio-economic pathways are integrated to quantify the impact extent of changing risk of DFAA on population and economy.The results show that in historical periods,the hotspots of the DFAA events were mainly distributed in the middle and lower reaches of the basin,with drought-flood and flood-drought events occurring 10-12 times per decade,and drought-flood-drought and flood-drought-flood events occurring 3-4 times per decade.Drought-flood-drought and flood-drought-flood events are projected to significantly increase in the future for the whole basin,and parts of it will experience a growth of approximately seven times.For the historically recorded 50-year DFAA events,the probability of their occurrence will increase by 5 to 10 times in the future,and the population and economy of the basin will be significantly affected.关键词
旱涝急转/标准化降水蒸散指数/第六次国际耦合模式比较计划/人口暴露/长江流域Key words
drought-flood abrupt alternation/standardized precipitation evapotranspiration index/Coupled Model Intercomparison Project in the Sixth Phase/population exposure/Yangtze River basin分类
大气科学引用本文复制引用
孟长青,董子娇,王远坤,张余庆,钟德钰..长江流域旱涝急转演变特征及其社会经济暴露度[J].水力发电学报,2024,43(4):34-49,16.基金项目
国家自然科学基金项目(41901028 （）
52279064) （）
