Automated Real-Time Streamflow Acquisition in a Mountainous River Using Acoustic Tomography

Kawanisi, Kiyosi; Sawaf, Mohamad Basel Al; Danial, Mochammad Meddy

doi:10.1061/(asce)he.1943-5584.0001604

Cited by 18 publications

(31 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sound rays of FATS are capable of covering the whole cross-section of the stream and capturing the depth-and range-averaged velocity. As a result, the FATS can accurately estimate the cross-sectional averaged velocity [11]. To obtain the discharge (Q), the cross-sectional averaged velocity is multiplied by cross-sectional area (A 0 ), which varies in time and corresponds to water level fluctuation.…”

Section: The Overview Of the Fluvial Acoustic Tomography Systemmentioning

confidence: 99%

“…To obtain the discharge (Q), the cross-sectional averaged velocity is multiplied by cross-sectional area (A 0 ), which varies in time and corresponds to water level fluctuation. For detailed information about the FATS measurement method and its reliability, readers can refer to previous studies [11][12][13][14].…”

Section: The Overview Of the Fluvial Acoustic Tomography Systemmentioning

confidence: 99%

“…The acoustic pulses (central frequency: 30 and 53 kHz) were transmitted concurrently from both transducers every 30 s. The transducers were installed at the height of 0.2 m above the channel bed using stands. Western branch Index-velocity method as described by Kawanisi et al [11] 6 to 29 November 2017 Northern branch Two-crossing transmission lines as described by Kawanisi et al [13] and Bahreinimotlagh et al [14] On the other hand, the monitoring of tidal discharge at the northern branch was conducted from 6 to 29 November 2017 to obtain additional data related to the phase difference investigation at the junction. In this case, we use two pairs of FATS with a two-crossing transmission lines configuration to estimate tidal discharge, as proposed by Kawanisi et al [13] and Bahreinimotlagh et al [14].…”

Section: Acquisition Of Fats Datamentioning

confidence: 99%

“…Application of the index velocity method for calculating continuous records of discharge has become increasingly common, particularly since the development of acoustic-based instruments such as acoustic velocity meters (AVMs) and horizontal acoustic Doppler current profilers (H-ADCPs) and acoustic tomography systems [11,[15][16][17]. In this study, the index velocity method (IVM) is used to estimate the discharge based on the regression equation obtained from the relationship between the velocity parameter of ADCP measurement and velocity along the transmission line of FATS measurement, as described in the previous work of Kawanisi et al [11]. Subsequently, the discharge can be performed as a product of the regression equation and cross-sectional area, which is a function of water depth.…”

Section: Acquisition Of Fats Datamentioning

confidence: 99%

See 3 more Smart Citations

Characteristics of Tidal Discharge and Phase Difference at a Tidal Channel Junction Investigated Using the Fluvial Acoustic Tomography System

Danial

Kawanisi

Sawaf

2019

Water

Self Cite

View full text Add to dashboard Cite

This study investigates the tidal discharge division and phase difference at branches connected to a channel junction. The tidal discharge at three branches (eastern, western, and northern branches) was continuously collected using the fluvial acoustic tomography system (FATS). The discharge asymmetry index was used to quantify the flow division between two seaward branches (eastern and western branches). The cross-wavelet method was applied to calculate the phase difference between the tidal discharge and water level. The discharge asymmetry index shows that the inequality of flow division is obviously prominent during the spring tide duration, where the eastern branch has the capability to deliver greater amounts of subtidal discharge, approximately 55–63%, compared with the western branch. However, the equality of flow division between the eastern and western channels can be observed clearly during the neap tide period. The wavelet analysis shows that the phase difference at the western branch is higher than at the eastern branch, because the geometry of the western branch is more convergent than that of the eastern branch. Accordingly, the amplitude of the tidal wave at the western branch is more magnified compared with that at the eastern branch. Moreover, the phase difference at the northern branch is greater than at the two seaward branches, implying that the phase difference is slightly increased after passing through the junction into the northern branch.

show abstract

Section: The Overview Of the Fluvial Acoustic Tomography Systemmentioning

confidence: 99%

Section: The Overview Of the Fluvial Acoustic Tomography Systemmentioning

confidence: 99%

Section: Acquisition Of Fats Datamentioning

confidence: 99%

Section: Acquisition Of Fats Datamentioning

confidence: 99%

See 2 more Smart Citations

Characteristics of Tidal Discharge and Phase Difference at a Tidal Channel Junction Investigated Using the Fluvial Acoustic Tomography System

Danial

Kawanisi

Sawaf

2019

Water

Self Cite

View full text Add to dashboard Cite

show abstract

“…Doing so also has the benefit of minimizing the hydraulic disturbance and subsequent geomorphic degradation of the channels of receiving streams (Russell et al, 2020). In coupling with real time flow monitoring (Kawanisi et al, 2018), RTC offers the potential to adapt the controlled release to real time flow conditions, thus mimicking the natural streamflow and delivering the flow regime determined appropriate for the ecological objectives of the receiving water.…”

Section: Discussionmentioning

confidence: 99%

Real Time Control of Rainwater Harvesting Systems: The Benefits of Increasing Rainfall Forecast Window

Fletcher

Burns

et al. 2020

Water Resources Research

View full text Add to dashboard Cite

Use of real time control (RTC) technology in rainwater harvesting systems can improve performance across water supply, flood protection, and environmental flow provision. Such systems make the most of rainfall forecast information, to release water prior to storm events and thus minimize uncontrolled overflows. To date, most advanced applications have adopted 24-hr forecast information, leaving longer-term forecasts largely untested. In this study, we aimed to predict the performance of four different RTC strategies, based on different forecast lead time and preferred objectives. RTC systems were predicted to yield comparatively less harvested rainwater than conventional passive systems but delivered superior performance in terms of flood mitigation and delivery of environmental water for streamflow restoration. More importantly, using a 7-day rainfall forecast was shown to enhance the ability of RTC in mitigating flood risks and delivering an outflow regime that is close to the natural (reference) streamflow. Such a finding suggests that RTC combined with 7-day forecast can enhance the functionality of rainwater harvesting systems to restore and even mimic the entire natural flow regimes in receiving streams. This also opens up a new opportunity for practitioners to implement smart technology in managing urban stormwater in a range of contexts and for a range of stream health objectives. Plain Language Summary "Smart tanks" based on real time control is increasingly used in rainwater harvesting systems to address water shortages, urban flooding, and streams depleted of flow. Smart tanks, controlled by real time control, can use a range of digital information (e.g., rainfall forecast) to make optimal decisions to release some tank water before heavy rain, to reduce flood risks, while still supply water to households. Globally, most uses of this technology use 1-day forecasts of rainfall. To understand the effect of longer prediction window, we compared four strategies using either 1-day or 7-day rainfall forecast and modeled their performance using specialized computer code. We found that smart tanks using 7-day rainfall forecasts are superior in reducing urban flood risks and restoring baseflows to streams. More importantly, they can release the tank water in a pattern that is similar to natural streamflow, thus helping to restore and sustain healthy waterway habitats. Our study is the first reported application of 7-day forecast information in smart control rainwater tanks. It opens up a new opportunity in managing urban water in a range of contexts and for a range of stream health objectives.

show abstract

Real-Time Control of Rainwater Harvesting Systems: The Benefits of Increasing Rainfall Forecast Window

Fletcher

Burns

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

Automated Real-Time Streamflow Acquisition in a Mountainous River Using Acoustic Tomography

Cited by 18 publications

References 21 publications

Characteristics of Tidal Discharge and Phase Difference at a Tidal Channel Junction Investigated Using the Fluvial Acoustic Tomography System

Characteristics of Tidal Discharge and Phase Difference at a Tidal Channel Junction Investigated Using the Fluvial Acoustic Tomography System

Real Time Control of Rainwater Harvesting Systems: The Benefits of Increasing Rainfall Forecast Window

Real-Time Control of Rainwater Harvesting Systems: The Benefits of Increasing Rainfall Forecast Window

Contact Info

Product

Resources

About