Analysis on period characteristics and variation trends of rainfall series in Nanliujiang river
Variations and trends of rainfall series are important problems and should be pain attention before basic flood control and drought relief.By taking the Nanliujiang river basin of Beibu gulf economic region as an example,this paper used wavelet analysis and R/S analysis to investigate the period characteristics and variation trends of rainfall series.The results showed that the upper reaches of Nanliujiang river had an obvious period about 3 to 8 years,the annual rainfall tended to decrease in the future;the middle reaches of Nanliujiang river had an obvious period about 3 to 8 years,the annual rainfall tended to increase in the future;and the lower reaches of Nanliujiang river had an obvious period about 5 to 8 years,the annual rainfall tended to increase in the future.It was concluded that the flood control should focus on the middle and lower reaches of Nanliujiang river,and need to prevent unexpected rainfall.
rainfall seriesperiod characteristicvariation trendwavelet analysisR/S analysisreaches of Nanliujiang river
国家科技期刊平台
NSTL
万方数据
维普
