Application of Hilbert-Huang Transform on analysis of law of annual maximum peak flood
Zhang Ju · Computer Engineering and Applications Journal · 2009
Compared with traditional analytical method of time series,Hilbert-Huang Transform has advantages to quantitatively describe time-frequency characteristics for nonlinear,unsteady,weak-dependency and highly complex time series.Empirical Mode Decomposition(EMD) method is adopted to analyze time series and Intrinsic Mode Function (IMF) and trend term are obtained. Then,Hilbert transform is made for each IMF.Taking two of the typical hydrological stations:Shiquan and Ankang stations in the upper Hanjiang River as examples,periods analysis of IMF show that annual maximum peak flood of Shiquan station has periods of 3.06,7.11 and 24.98 years.Annual maximum peak flood of Ankang station has periods of 3.01,6.07,15.97 and 29.65 years.