摘要
为研究雅砻江流域降水的季节和年变化趋势及周期的时空分布特征,利用1960-2018年雅砻江流域9个气象站点的年季平均降水量,采用Mann-Kendall(M-K)检验和小波分析对降水时间序列进行分析。结果表明:流域降水年、季空间分布不均匀,总体呈现出从西北向东南递增的趋势;1960-2018年流域年降水量呈增长趋势,春季降水呈显著增长趋势,近90%的站点年降水量变化呈增长趋势;雅砻江流域年降水序列突变点出现在1980年,流域的降水变化周期一般为4~8年、10~15年、26~28年。研究可为雅砻江流域的水资源合理规划及利用提供参考。
To study the seasonal and annual variation trend of precipitation in Yalong River basin and the temporal and spatial distribution characteristics of its cycle.Based on the annual and seasonal average rainfall of 9 meteorological stations in the Yalong River basin from 1960 to 2018,Mann-Kendall(MK)test and wavelet analysis were used to analyze the rainfall time series.The results show that the annual and seasonal spatial distribution of rainfall in the basin is uneven,and the overall trend is increasing from northwest to southeast.From 1960 to 2018,the annual rainfall in the river basin showed an increasing trend,and the annual rainfall in spring showed a significant increasing trend,and the annual rainfall of nearly 90%stations showed an increasing trend.The abrupt change point of annual rainfall sequence in Yalong River basin appeared in 1980,and the rainfall change cycle in the basin was generally 4~8a,10~15a and 26~28a.This will play a guiding role in decision-making for the rational planning and utilization of water resources in Yalong River Basin.
作者
万浩
齐明臣
李红梅
WAN Hao;QI Mingchen;LI Hongmei(Chongqing Wujiang Electric Power Co.,Ltd.,Chongqing 409000,China)
出处
《水资源开发与管理》
2022年第4期34-42,共9页
Water Resources Development and Management
