白鹤滩电站大坝汛期降水日变化特征
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中图分类号 S164 文献标识码A 文章编号 1007-7731（2025）12-0115-04
DOI号 10.16377/j.cnki.issn1007-7731.2025.12.027
Daily variation characteristics of precipitation during flood season for the dam of Baihetan Hydropower Station
WANG Chuanyun1LUO Shaoyan1HUANG Xia1MA Guxia² （ 1 Meteorological Bureau of Liangshan Yi Autonomous Prefecture，Xichang 615Ooo， China; ²Meteorological Bureau of Zhaojue County， Zhaojue 616150， China）
AbstractTo serve agricultural production and water resource management，the daily variation characteristics of precipitation from Mayto October during the flood season of Baihetan Hydropower Station was analyzed from two aspects：precipitationamount and frequency，based on hourly precipitationobservation data from theautomatic meteorologicalobservation stations ontheleftbank（I Station）andrightbank（I Station）of thedamin January 2012 to December 2022.The results indicated thatthe daytime precipitation and frequency of precipitation at Baihetan Hydropower Station weresignificantly lower than at night.Nighttime precipitation accounts for about 80% and precipitation frequency accounts for 70% . The amount and frequency of precipitation in the second half of the night were higher than those in the first half of the night，and the highest precipitation occurs at 4：OO on the I station;daytime precipitation accounts for about 20% and precipitation frequency accounts for 30% . Afternoon precipitation and precipitation frequency wereboth lessthan inthe morning，with the lowest precipitation frequency occuring at15：00 in Istation; the relative precipitation frequency was higher during the daytime （especially in the morning）in July and September.This“night rain” feature had important reference value for local agricultural activity arrangements，crop water use eficiency，and reservoir agricultural irrigation scheduling.
Keywordsdamof Baihetan Hydropower Station; precipitation; precipitation frequency;dailyvariation;agricultural production
水电站作为重要的清洁能源来源之一，具有低碳、环保等优势，其建设和运营对于能源供应、洪水调节和水资源管理等具有重要意义。（剩余4264字）