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Non-stationary flood frequency analysis of North River and West River Delta with time-varying moments
Pages: 130-135
Year: Issue:  4
Journal: Acta Scientiarum Naturalium Universitatis Sunyatseni

Keyword:  North River and West River Deltaflood frequency analysisnon-stationary runoff seriestime-varying moments;
Abstract: The time-varying moment (TVM)was used to analyze the non-stationary flood frequency in the North River and West River Delta and its response to the changing environment using the annual peak discharge records of Makou and Sanshui stations from 1960 to 2009.In comparison with traditional fre-quency analysis,TVM takes into consideration of varying characteristic parameters of hydrological time series and therefore gives better results reflecting the evolution character on the changing environment. The return period decreases with the appointed design discharges,while the design discharge increases significantly with the appointed return period,which is consistent with the phenomenon of more and more extreme hydrologic events in the North River and West River Delta in recent years.
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