Multiple time scale analysis of water & sediment load and bankfull discharge of the lower Yellow River
Based on water & sediment load series of Xiaolangdi, Huanyuankou, Gaocun, Lijin Station and bankfull discharge series of Huanyuankou, Gaocun, Lijin Station, the multi-time scale characteristics of the lower Yellow River are analyzed by using wavelet analysis in this paper. The results show that there are obvious periodic oscillations of 3a, 9a, 14a and 23a for the runoff series, the prime period is 23a; there are obvious periodic oscillations of 5a, 11a, 23a and 36a for the sediment load series, the prime period is 11a; there is obvious periodic oscillation of 24a for the bankfull discharge series. The multi-time scale characteristics of runoff and sediment load are similar, which influence the period of bankfull discharge series. Due to the natural factors and the actions of human being, the characteristics in different time scale are inconsistent. The point of discontinuity is related to time scale. The points of discontinuity of water&sediment load and bankfull discharge series of the lower Yellow River are in 1957, 1968, 1980, 1991, 2003.
the lower Yellow Riverwavelet analysismultiple time scale analysisbankfull discharge
国家科技期刊平台
NSTL
万方数据
维普
