Abstract:Based on the daily precipitation data of 15 ground stations in the source regions of the Yellow River, the daily runoff data of Tangnaihai Hydrological Station and the wavelet analysis method, this paper analyzed the periodic law, change trend and correlation of precipitation and runoff in the flood season of the source regions of the Yellow River from 1961 to 2020. The results show that a) the precipitation and runoff in the flood season of the source regions of the Yellow River in the past 60 years have the characteristics of multitime scales, and the variation trends of precipitation and runoff in flood season are different at different time scales. b) The precipitation and runoff series in flood season have the main periods of about 63 years and about 35 years, and the average periods of the three time scales are about 41 years and 25 years, respectively. The precipitation and runoff in flood season have a certain positive correlation. c) Under the 63year characteristic time scale, it can be predicted that the precipitation and runoff in the flood season of the source regions of the Yellow River will decrease in the next 5-10 years after 2020.
Key words:precipitation in flood season; runoff in flood season; wavelet analysis; source regions of the Yellow River
.黄河源区汛期降水径流序列多尺度小波分析[J].人民黄河,2024,46(4):32-36.
XUAN Dangwei1, ZHANG Xianzhi1, LIU Longqing1, YAN Changsheng1, BAI Yu2, YU Hang1, GUO Qiang1, LIU Yuhuan1
翻译
搜索
复制
.MultiScale Wavelet Analysis of Precipitation and Runoff Series in Flood Season in the Source Region of the Yellow River
.Yellow River,2024,46(4):32-36.
[8]KUANG X X,JIAO J J.Review on Climate Change on the Tibetan Plateau During the Last Half Century[J].Journal of Geophysical Research: Atmospheres,2016,121(8):3979-4007.
Abstract: Based on the daily precipitation data of 15 ground stations in the source regions of the Yellow River, the daily runoff data of Tangnaihai Hydrological Station and the wavelet analysis method, this paper analyzed the periodic law, change trend and correlation of precipitation and runoff in the flood season of the source regions of the Yellow River from 1961 to 2020. The results show that a) the precipitation and runoff in the flood season of the source regions of the Yellow River in the past 60 years have the characteristics of multitime scales, and the variation trends of precipitation and runoff in flood season are different at different time scales. b) The precipitation and runoff series in flood season have the main periods of about 63 years and about 35 years, and the average periods of the three time scales are about 41 years and 25 years, respectively. The precipitation and runoff in flood season have a certain positive correlation. c) Under the 63year characteristic time scale, it can be predicted that the precipitation and runoff in the flood season of the source regions of the Yellow River will decrease in the next 5-10 years after 2020.
Key words: precipitation in flood season; runoff in flood season; wavelet analysis; source regions of the Yellow River