水力发电2026，Vol.52Issue(6)：22-27,6.
乌东德水电站蓄水前后降水变化特征
Characteristics of Precipitation Changes in the Reservoir Area before and after the Storage of Wudongde Reservoir
摘要
Abstract
The characteristics of precipitation changes before and after the impoundment of Wudongde Hydropower Station are analyzed by using mathematical statistics,linear fitting,Theil-Sen slope and SPI drought index methods.Since 2014,five fixed observation points of automatic weather stations in the dam area of Wudongde Hydropower Station have been built,but there is a lack of long-term observation data,making it impossible to directly calculate SPI.The monthly precipitation data from 1994 to 2024 of seven national meteorological stations within a 100-kilometer radius of Wudongde Hydropower Station are used to construct a gamma distribution parameter interpolation method to fit the relevant parameters of the drought index SPI of Wudongde Hydropower Station,thereby calculating the drought index SPI.The results show that:(a)the precipitation in Wudongde Hydropower Station has generally decreased over past 11 years,however,the trend rate before impoundment is negative,while it is positive after impoundment,indicating an upward trend in precipitation after impoundment;(b)based on the spatial distribution of drought and flood frequencies of SPI12,the hydropower station is prone to flooding before impoundment,and after impoundment,the frequency of drought is lower than that of the surrounding areas in the regional drought environment;and(c)the SPI3 slopes of the five automatic weather stations in the hydropower station are generally stable,a negative center of drought occurred before impoundment,while a positive center of flooding emerged after impoundment,and to the south of the dam area,the flooding trend is more obvious.关键词
降水变化/水库蓄水/SPI/参数插值/Theil-Sen斜率/乌东德水电站Key words
precipitation change/reservoir impoundment/SPI/parameter interpolation/Theil-Sen slope/Wudongde Reservoir分类
天文与地球科学引用本文复制引用
王将,邹阳,孙俊奎,马志敏..乌东德水电站蓄水前后降水变化特征[J].水力发电,2026,52(6):22-27,6.基金项目
国家自然科学基金资助项目(42375043) （42375043）
中国气象局创新发展专项"CMA 区域模式在我国低纬高原复杂地形区的性能评估及改进研究"(CXFZ2025J017) （CXFZ2025J017）
云南省气象局科研项目(YZ202450) （YZ202450）
