Scaling characteristics of mountainous river flow fluctuations determined using a shallow-water acoustic tomography system

Sawaf, Mohamad Basel Al; Kawanisi, Kiyosi; Kagami, Junya; Bahreinimotlagh, Masoud; Danial, Mochammad Meddy

doi:10.1016/j.physa.2017.04.168

Cited by 19 publications

(11 citation statements)

References 23 publications

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“…Nonetheless, it was demonstrated that the low-frequency variations of water discharge were similar (Kawanisi et al, 2016;Al Sawaf et al, 2017). In this study, the discharge from Gion gates was not available.…”

Section: Hydrodynamic Characteristics In the Otagawa Floodwaymentioning

confidence: 74%

Suspended particulate matter concentration in response to tidal hydrodynamics in a long mesotidal floodway

Xiao

Kawanisi

Sawaf

2020

Estuarine, Coastal and Shelf Science

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Section: Hydrodynamic Characteristics In the Otagawa Floodwaymentioning

confidence: 74%

Suspended particulate matter concentration in response to tidal hydrodynamics in a long mesotidal floodway

Xiao

Kawanisi

Sawaf

2020

Estuarine, Coastal and Shelf Science

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“…Kawanisi et al (2015) measured energy flux in a strait by employing FATS, where the acoustic transmission line was around 1,204 m [10]. Bahreinimotlagh et al (2016) [11] and Al Sawaf et al (2017) [12] measured the streamflow of a shallow mountainous river using FATS, where the length of transmission line was about -300 m. Danial et al (2019) investigated the characteristics of tidal discharge in the three tidal channel junctions using three pairs of FATS, where their transmission lines were 224, 246 and 290 m [13].…”

Section: Introductionmentioning

confidence: 99%

Influence of Suspended Sediment Concentration and Particle Sizes on the Sound Attenuation of the Fluvial Acoustic Tomography Technique

Bahreinimotlagh¹,

Kawanisi

Kavousi³

et al. 2020

J. of Wat. & Envir. Tech.

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Fluvial Acoustic Tomography System (FATS) as an advanced technology acquires continuous streamflow data in rivers and estuaries even during floods. However, the acoustic signals are dramatically attenuated by suspending sediments which this problem is a new field of study. In this study, we propose a new equation to estimate the maximum applicable measurement distances (MAMDs). It is based on the cross-sectional suspended sediment concentration () and the particle sizes on the 30-kHz FATS. Our study results show that MAMD might be 2,380 m in the clear water. Moreover, the streamflow monitoring can be perfectly done while is less than 12.67 kg/m 3 with the particle radii of 3 μm, when the horizontal distance between two acoustic stations is 100 m. Also, the acoustic signals are not decayed if the particle radii equal to 20 mm and the maximum is 6.6 kg/m 3. This study highlights the performance of FATS in the presence of high and provides a better perspective of applying FATS in different rivers with high variability of .

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“…Yu, Ghasemizadeh, Padilla, Kaeli, & Alshawabkeh, 2016). It is also applicable in the detection of long-range correlations, which can be considered as a powerlaw decay of the correlation function (Al Sawaf, Kawanisi, Kagami, Bahreinimotlagh, & Danial, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Water level fluctuations in Brazilian rivers have been investigated by Rego, Frota, & Gusmão (2013), whose results indicated the existence of multifractality. Al Sawaf et al (2017) tried to determine the scaling properties of a mountainous river in Japan using DFA.…”

Section: Introductionmentioning

confidence: 99%

The effects of extremes and temporal scale on multifractal properties of river flow time series

Hekmatzadeh

Haghighi

Guyomi

et al. 2019

River Research & Apps

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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.

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Scaling characteristics of mountainous river flow fluctuations determined using a shallow-water acoustic tomography system

Cited by 19 publications

References 23 publications

Suspended particulate matter concentration in response to tidal hydrodynamics in a long mesotidal floodway

Suspended particulate matter concentration in response to tidal hydrodynamics in a long mesotidal floodway

Influence of Suspended Sediment Concentration and Particle Sizes on the Sound Attenuation of the Fluvial Acoustic Tomography Technique

The effects of extremes and temporal scale on multifractal properties of river flow time series

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