摘要
基于抚仙湖周边4个气象站1959~2017年逐年降水资料,通过Mann-Kendall突变检验、小波分析及GIS空间分析,对抚仙湖降雨量进行多时间尺度分析.研究发现,抚仙湖近60来降水倾向率为-7.38 mm/10a,其平均降水量存在12~20年纪变化周期,其中以18 a周期最为显著,年降水量存在“丰—枯—丰”等多个循环交替;1976年以后,抚仙湖流域降水量频繁出现突变,说明在此期间内抚仙湖流域出现了一个不稳定的时期;抚仙湖流域多年平均降水量的空间分布由西南向东北递增,东西方向的降水差异相对较小;流域近60年来降水有波动,年际变化也存在“丰—枯—丰”,但总体略有减少.
The rainfall around the Fuxian Lake is studied on time and space scales through Mann-Kendall II mutation test,wavelet analysis and GIS spatial analysis of the annual precipitation data of four weather stations around it from 1959 to 2017.It is found that the Fuxian Lake has a precipitation tendency of-7.38mm/10a in recent 60 years and a periodic variation in average precipitation in the cycle of 12~20 years,of which 18-year cycle is the most significant and shows a cyclic alternating pattern as“wet season-dry season-wet season”in annual precipitation;the precipitation in the Fuxian Lake Basin has frequently shown abrupt changes since 1976,which is a sign of the existence of an unstable period in this area,and its annual average precipitation shows a spatial distribution of gradual increase from southwest to northeast,and a relatively small difference between the east and the west;there exists a fluctuation in recent 60 years and an interannual variation of“wet season-dry season-wet season”in the precipitation,but with a slight decrease on the whole.
作者
赵健霞
李奎
和德科
段立曾
ZHAO Jianxia;LI Kui;HE Deke;DUAN Lizheng(School of Geography and Soil Engineering,Yuxi Normal University,Yuxi,Yunnan 653100;Attached Middle School of Yuxi Normal University,Yuxi,Yunnan 653100;Shangrila Middle School of Diqing Tibetan Autonomous Prefecture,Diqing,Yunnan 674400;Yunnan University,Kunming,Yunnan 650500)
出处
《玉溪师范学院学报》
2020年第6期79-86,共8页
Journal of Yuxi Normal University
基金
云南省应用基础研究计划青年项目(2016FD111).
作者简介
赵健霞,硕士,讲师,研究方向:自然地理学;通信作者:李奎,中学2级,研究方向:自然地理学.
