白鶴灘電站大壩汛期降水日變化特征

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中圖分類號 S164 文獻(xiàn)標(biāo)識碼A 文章編號 1007-7731（2025）12-0115-04

DOI號 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

水電站作為重要的清潔能源來源之一，具有低碳、環(huán)保等優(yōu)勢，其建設(shè)和運(yùn)營對于能源供應(yīng)、洪水調(diào)節(jié)和水資源管理等具有重要意義。（剩余4264字）