翁源近30年汛期降水气候特征分析

Analysis of the Climate Characteristics of Precipitation during the Flood Season in Wengyuan in the Past 30 Years

摘要: 选取1992~2022年翁源区域自动站的逐日降雨气象数据，统计分析翁源县汛期降水气候特征，结果表明：翁源县年降水量的70%集中在汛期，翁源县汛期降水量的多少基本决定了年降水量的多少。翁源县汛期各月平均降水量变化呈现“单峰型”，6月最多、9月最少。翁源县多年平均年降水量、汛期降水量及汛期降水异常偏多年降水量总体呈现“西多东少”的空间分布特征，而汛期降水异常偏少年降水量的空间分布特征发生明显变化，高值中心转移到坝仔镇，低值中心转移到翁城南部、官渡西部及龙仙东部部分区域，总体呈现“北多，西南和东南少”的空间分布特征。翁源汛期降水的量级以小雨为主，降水量级越高占比越小。

Abstract: The daily rainfall meteorological data of Wengyuan Regional Automatic Station from 1992 to 2022 were selected, and the precipitation climate characteristics of Wengyuan County during the flood season were statistically analyzed. The results showed that 70% of the annual precipitation in Wengyuan County was concentrated in the flood season, and the amount of precipitation in Wengyuan County during the flood season basically determines the annual precipitation. The average precipitation changes each month during the flood season in Wengyuan County are “unipeak,” with the most in June and the least in September. The average annual precipitation in Wengyuan County, the precipitation during the flood season and the precipitation during the flood season generally show the spatial distribution characteristics of “more in the west and less in the east”, while the spatial distribution characteristics of abnormally adolescent precipitation during the flood season have changed significantly. The high-value center is transferred to Bazai Town, and the low-value center is transferred to some areas in the south of Wengcheng, western Guandu and eastern Longxian, and the overall spatial distribution characteristics of “more in the north, less in the southwest and southeast”. The precipitation in Wengyuan is mainly light rain during the flood season, and the higher the precipitation, the smaller the proportion.