水利水电技术（中英文）2024，Vol.55Issue(6)：32-43,12.DOI:10.13928/j.cnki.wrahe.2024.06.003
辽宁省旱涝急转特征与趋势研究
Study on the characteristics and trend of drought-flood abrupt alternation in Liaoning Province
摘要
Abstract
[Objective]The abrupt transition of drought and flood has a high degree of suddenness and disaster.The characteris-tics and trend of drought-flood abrupt alternation in Liaoning Province are clarified,and the basis is provided for the early warning of drought and flood disaster and the emergency management of water resources in Liaoning Province.[Methods]The index of drought-flood abrupt alternation is the basis of the research of drought-flood abrupt alternation.Based on the precipitation data of 19 meteorological stations in Liaoning Province from 1970 to 2020,the spatial and temporal characteristics were analyzed by using the long-period and short-period drought-flood transition indexes(LDFAI and SDFAI),and the similarities and differences of drought-flood rapid transition indexes were pointed out to realize the quantitative identification of drought-flood rapid transition events in Liaoning Province.[Results]The result show that:(1)The overall trend of LDFAI and SDFAI in Liaoning Province from 1970 to 2020 is increasing,and the risk of drought to flood in Liaoning Province is gradually increasing in the future.(2)The probability of drought and flooding in Liaoning Province is spatially differentiated and is closely related to the unequal distri-bution of precipitation in Liaoning Province.(3)The magnitude of change in the center of gravity of the SDFAI is significantly larger than that of the LDFAI,and the migration centers of LDFAI and SDFAI are mainly concentrated in Panjin,Anshan,and Yingkou in the central part of Liaoning Province.[Conclusion]On the whole,the phenomenon of abrupt change of drought and flood occurred frequently in Liaoning province,and the intensity increased year by year.The research result can provide a theo-retical reference for Liaoning Province to scientifically respond to drought and flood disasters and improve the ability of water resources emergency management.关键词
旱涝急转/长周期旱涝急转指数/短周期旱涝急转指数/时空分布/辽宁省Key words
drought-flood abrupt alternation/long drought-flood abrupt alternation index(LDFAI)/short drought-flood abrupt alternation index(SDFAI)/spatiotemporal distribution/Liaoning Province分类
天文与地球科学引用本文复制引用
赵子萌,邵薇薇,曹永强,任博..辽宁省旱涝急转特征与趋势研究[J].水利水电技术（中英文）,2024,55(6):32-43,12.基金项目
国家自然科学基金项目(51979285) （51979285）
流域水循环模拟与调控国家重点实验室自主研究课题(SKL2022TS11) （SKL2022TS11）
北京市自然科学基金项目(8222036) （8222036）
