Figure legends

Fig. 1 The Gono River and its tributary (Basen and Saijo Rivers), the location of the MLIT gauging stations (Green dots) and the position of the two acoustic stations (T1 & T2) of the FAT system (Red dots).
Fig. 2 Illustration for the symbolic strings method, a) the basic approach, b) illustration for data aggregation using Aggregation Length (AL=2).
Fig. 3 Discharge time series during the study period (2002-2017) observed at Awaya (red), Minamihatachiki (green), Miyoshi (blue), and Ozekiyama (Black) stations.
Fig. 4 A Comparison between the discharge performance computed by QFAT (purple) at QRC (black) at Ozekiyama observation site.
Fig. 5 Temporal scales of low frequency streamflow variations according to and complexity measures recorded at each station.
Fig. 6 Information-Complexity diagram for the streamflow data according to different aggregation length.
Fig. 7 Information and complexity contents for high frequency (a, b) and low frequency (c, d).
Fig. 8 Graphical hydrograph separation method: For the Gōno River catchment N ≈ 4 days.
Fig. 9 Power spectra results forQOzekiyama (black) andQFAT (purple) during (2016/01 to 2016/06).