气候变化研究进展2024，Vol.20Issue(5)：571-580,10.DOI:10.12006/j.issn.1673-1719.2024.131
南水北调西线工程水源区和受水区降水变化及丰枯遭遇特征分析
Trends of precipitation and characteristics of wetness-dryness encountering in the water source and receiving areas of the west route of the South-to-North Water Transfer Project
摘要
Abstract
Based on the daily precipitation data from 274 national meteorological stations in the west route of the South-to-North Water Transfer Project area from 1961 to 2022,the spatiotemporal distribution characteristics of annual and seasonal precipitation in the water source and receiving areas were analyzed,as well as the characteristics of the encounter between dryness and wetness in the two areas.The results show that in the past 62 years,the precipitation in the water source area of the west route of the South-to-North Water Transfer Project showed an increasing trend,while the trend of precipitation in the water receiving area was not significant.The seasonal precipitation of summer and winter in both water source area and receiving area increased.The precipitation of spring and autumn in water source area increased while that in water receiving area decreased.The frequency of dryness in water source area was lower than that in water receiving area in spring,summer,and autumn.The frequency of dryness in water source area showed a decreasing trend,while the frequency of wetness showed an increasing trend.The asynchronous frequency of annual and seasonal precipitation in the water source area and receiving area was above 60%,which was much higher than the synchronous frequency.The five types of dryness-wetness encountering favorable for water transfer occurred at a frequency of over 50%in spring,summer,and autumn.In general,the precipitation in water source and receiving areas of the west route of the South-to-North Water Transfer Project had a strong compensatory effect,and the frequency of dryness-wetness encountering favorable for water transfer increased after 1971,ensuring the possibility of water supply.However,the frequency of continuous dryness years in water source area was high.Therefore,it is necessary to consider climate changes of precipitation in water source and receiving areas in the planning,design,and operation scheduling of the west route of the South-to-North Water Transfer Project.关键词
降水/丰枯遭遇/南水北调西线/水源区/受水区Key words
Precipitation/Wetness-dryness encountering/The west route of the South-to-North Water Transfer Project/Water source area/Water receiving area引用本文复制引用
王荣,杜孝忠,巢清尘,赵珊珊,叶殿秀,李修仓,李莹,张梦然..南水北调西线工程水源区和受水区降水变化及丰枯遭遇特征分析[J].气候变化研究进展,2024,20(5):571-580,10.基金项目
国家重点研发计划项目(2022YFC3202400) （2022YFC3202400）
中国气象局水文气象重点开放实验室开放研究课题(23SWQXM027) （23SWQXM027）
国家自然科学基金项目(41875120) （41875120）
