摘要
针对阿勒泰市的极端降水变化特征,利用1964—2018年阿勒泰市年最大日降水量的观测数据,采用累积距平法、非参数Mann-Kendall检验法和小波分析进行了趋势、突变和周期分析。结果表明:近54 a阿勒泰市的年最大日降水量呈现不显著的增加趋势,且其增长速率为0.313 mm/10 a;阿勒泰市的年最大日降水量序列在1992年发生突变,由减小趋势突变为增加趋势;阿勒泰市54 a以来的年最大日降水量存在28 a、18 a、8 a和5 a的主周期。
Altay is located in the northernmost part of Xinjiang,and its unique geographical location has a great impact on climate.In order to understand the variation characteristics of extreme precipitation in Altay,the trend,catastrophe analysis and period analysis are carried out by using cumulative anomaly method,nonparametric Mann-Kendall test and wavelet analysis method based on the observed data of annual maximum daily precipitation in Altay from 1964 to 2018.The results show that the annual maximum daily precipitation in Altay has shown a non-significant increase trend in recent 54 years,and its growth rate is 0.313 mm/10a.The annual maximum daily precipitation series in Altay changed abruptly in 1992,from decreasing trend to increasing trend.In addition,the annual maximum daily precipitation in Altay from 1964 to 2018 had four main periods of 28 years,18 years,8 years and 5 years.
作者
宋倩
SONG Qian(Zhaosu County Water Conservancy Bureau,Yili 835600,China)
出处
《广东水利水电》
2019年第10期36-38,共3页
Guangdong Water Resources and Hydropower
关键词
年最大日降水量
阿勒泰市
变化特征
annual maximum daily precipitation
Altay city
variation characteristics
