Hekmatzadeh, AA, Torabi Haghighi, A, Hosseini Guyomi, K, Amiri, SM, Kløve, B. The effects of extremes and temporal scale on multifractal properties of river flow time series. River Res Applic. 2020; 36: 171– 182. https://doi.org/10.1002/rra.3550
The effects of extremes and temporal scale on multifractal properties of river flow time series
|Author:||Hekmatzadeh, Ali Akbar1; Torabi Haghighi, Ali2; Hosseini Guyomi, Kianoosh1;|
1Department of Civil and Environmental Engineering, Shiraz University of Technology, Shiraz, Iran
2Water, Energy and Environmental Engineering unit, University of Oulu, Finland
3Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019112243732
John Wiley & Sons,
|Publish Date:|| 2020-11-19
For accurate forecasting of extreme events in rivers, streamflow time series with sub‐daily temporal resolution (1–6 hour) are preferable, but discharge time series for long rivers are usually available at daily or monthly resolution. In this study, the scaling properties of hourly and daily streamflow time series were measured. As an innovation, the effects of extreme values on the multifractal behavior of these series were evaluated. Interestingly, both hourly and daily discharge records led to nearly identical scaling trends and identical crossover times. Daily and hourly discharge time series appeared to be non‐stationary when the timescale ranged from 75 to 366 days. Otherwise, the signals may be considered stationary time series. In addition, the results indicated that the extreme values strongly contribute to the multifractality of the series. The width of singularity spectra decreased considerably when the extreme events were removed from both hourly and daily discharge records.
River research and applications
|Pages:||171 - 182|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
© 2019 John Wiley & Sons, Ltd. This is the peer reviewed version of the following article: Hekmatzadeh, AA, Torabi Haghighi, A, Hosseini Guyomi, K, Amiri, SM, Kløve, B. The effects of extremes and temporal scale on multifractal properties of river flow time series. River Res Applic. 2020; 36: 171– 182, which has been published in final form at https://doi.org/10.1002/rra.3550.
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