摘要
利用盘龙河流域22个雨量站1978—2018年的降水量观测资料,采用Mann-Kendall法、Morlet小波分析法、克里金插值法、3年滑动平均法、降水距平法、降水累积距平法对近41年来该流域降水量变化趋势进行研究。结果表明:近41年来盘龙河流域降水量呈明显增加趋势的是年及夏季、冬季,而在春季、秋季的降水量则相对较少;降水量在空间分布上呈现从上游到下游逐渐减少的趋势;在周期上,年降水量存在5个不同的主振荡周期,而春季、夏季、秋季、冬季降水量均存在3个主振荡周期;年际变化上,年、春季和秋季降水量均呈下降趋势,倾向率分别为-6.19、-5.00和-14.00 mm/10 a,其中在夏季和冬季倾向率分别为8.75、6.27 mm/10 a,降水量呈现逐渐上升的趋势。
Using the precipitation observation data of 22 precipitation stations in Panlong River Basin from 1978 to 2018,the Mann-Kendall method, Morlet wavelet analysis method, Kriging interpolation method, 3-year moving average method, precipitation anomaly method, precipitation cumulative distance Pingfa were used to study the change trends of precipitation in the basin in the past 41 years.The results showed that in the past 41 years, the precipitation in the Panlong River Basin had shown a significant increase in annual, summer and winter, while the precipitation in spring and autumn was relatively small;the spatial distribution of precipitation showed a gradual decrease trend from upstream to downstream.In terms of cycle, there were 5 different main oscillation periods for annual precipitation, and there were 3 main oscillation periods for precipitation in spring, summer, autumn and winter.In terms of interannual changes, the precipitation in the annual, spring and autumn all showed a downward trend, with tendency rates of-6.19,-5.00 and-14.00 mm/10 a respectively;in summer and winter, the trend rates were 8.75 and 6.27 mm/10 a, respectively, and the precipitation showed a gradual upward trend.
作者
郭文雅
李代华
王葵
范德方
覃信龙
王龙
GUO Wen-ya;LI Dai-hua;WANG Kui(College of Water Conservancy,Yunnan Agricultural University,Kunming,Yunnan 650201;Wenshan Branch of Yunnan Hydrology and Water Resources Bureau,Wenshan,Yunnan 663000)
出处
《安徽农业科学》
CAS
2021年第20期224-231,共8页
Journal of Anhui Agricultural Sciences
基金
云南省教育厅基金项目(2020J0246)。
关键词
降水量
变化特征
空间分布
盘龙河流域
Precipitation
Change characteristics
Spatial distribution
Panlong River Basin
