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Multiscale Temporal Irreversibility of Streamflow and Its Stochastic Modelling

Department of Water Resources, School of Civil Engineering, National Technical University of Athens, Heroon Polytechneiou 5, GR-15780 Zografou, Greece
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Academic Editor: Luca Brocca
Hydrology 2021, 8(2), 63; https://doi.org/10.3390/hydrology8020063
Received: 8 March 2021 / Revised: 29 March 2021 / Accepted: 30 March 2021 / Published: 7 April 2021
We investigate the impact of time’s arrow on the hourly streamflow process. Although time asymmetry, i.e., temporal irreversibility, has been previously implemented in stochastics, it has only recently attracted attention in the hydrological literature. Relevant studies have shown that the time asymmetry of the streamflow process is manifested at scales up to several days and vanishes at larger scales. The latter highlights the need to reproduce it in flood simulations of fine-scale resolution. To this aim, we develop an enhancement of a recently proposed simulation algorithm for irreversible processes, based on an asymmetric moving average (AMA) scheme that allows for the explicit preservation of time asymmetry at two or more time-scales. The method is successfully applied to a large hourly streamflow time series from the United States Geological Survey (USGS) database, with time asymmetry prominent at time scales up to four days. View Full-Text
Keywords: time’s arrow; irreversibility; time asymmetry; stochastic simulation; streamflow time’s arrow; irreversibility; time asymmetry; stochastic simulation; streamflow
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MDPI and ACS Style

Vavoulogiannis, S.; Iliopoulou, T.; Dimitriadis, P.; Koutsoyiannis, D. Multiscale Temporal Irreversibility of Streamflow and Its Stochastic Modelling. Hydrology 2021, 8, 63. https://doi.org/10.3390/hydrology8020063

AMA Style

Vavoulogiannis S, Iliopoulou T, Dimitriadis P, Koutsoyiannis D. Multiscale Temporal Irreversibility of Streamflow and Its Stochastic Modelling. Hydrology. 2021; 8(2):63. https://doi.org/10.3390/hydrology8020063

Chicago/Turabian Style

Vavoulogiannis, Stelios; Iliopoulou, Theano; Dimitriadis, Panayiotis; Koutsoyiannis, Demetris. 2021. "Multiscale Temporal Irreversibility of Streamflow and Its Stochastic Modelling" Hydrology 8, no. 2: 63. https://doi.org/10.3390/hydrology8020063

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