水利水电技术（中英文）2024，Vol.55Issue(2)：16-26,11.DOI:10.13928/j.cnki.wrahe.2024.02.002
近62 a三峡地区区域性暴雨过程气候特征及长期变化规律
Climatic characteristics and long-term variation of regional rainstorm process in the Three Gorges area in recent 62 years
摘要
Abstract
[Objective]To fully understand the beginning and end time of regional rainstorm process climatic characteristics and long-term change rules of regional rainstorm process in the Three Gorges region,so as to provide scientific basis for flood control and disaster reduction and water resources management in the Three Gorges Reservoir area.[Methods]Based on daily precipita-tion data of 33 national meteorological stations in the Three Gorges region from 1961 to 2022 and the regional rainstorm monitoring indexes currently adopted in Chongqing,the regional rainstorm process in the Three Gorges region was objectively identified,and the climatic characteristics and long-term change rules of the regional rainstorm process were analyzed by various mathematical statistic method.[Results]The results show that:(1)Nearly two-thirds of the heavy rain in the Three Gorges area occurs in re-gional form,with an average annual regional heavy rain process of 8.4 times,mainly from May to September,especially from June to July as the concentrated period.The average date of the first regional rainstorm is May 8,and the average end date of the last rainstorm is September 17.The average rainstorm coverage area of each process is 8.6 stations,the duration is 1.3 d,and the average rainstorm intensity is 74.7 mm/d.(2)The annual frequency of regional heavy rainfall processes in the Three Gorges region has a variation cycle of about 2～3 a and 8 a,and the average coverage area of regional heavy rainfall processes has a vari-ation cycle of 4～6 a and 8～11 a.(3)In recent 62 a,the first occurrence date of the annual regional heavy rainfall process in the Three Gorges area was significantly advanced,the last end date had no significant change,and the occurrence period was significantly longer;The occurrence frequency,average duration,average coverage and average comprehensive intensity showed no obvious change trend,but the average rainstorm intensity showed an increasing trend.(4)In the past 62 a years,there has been no abrupt change in the regional rainstorm process indexes in the Three Gorges area.[Conclusion]The results provide scientific support for flood control and disaster reduction,water resources management in the Three Gorges region,and respon-ding to social concerns about the impact of the Three Gorges Project on local climate.关键词
区域性暴雨过程/气候特征/变化趋势/变化周期/三峡地区/极端降雨/降水/三峡水库Key words
regional rainstorm process/climatic characteristics/the trend of change/period of change/Three Gorges region/extreme rainfall/precipitation/Three Gorges Reservoir分类
天文与地球科学引用本文复制引用
王荣,叶殿秀,肖潺,赵珊珊,陈鲜艳,李威..近62 a三峡地区区域性暴雨过程气候特征及长期变化规律[J].水利水电技术（中英文）,2024,55(2):16-26,11.基金项目
中国长江三峡集团有限公司项目(0704182) （0704182）
国家重点研发计划(2020YFA0608203) （2020YFA0608203）
