Measurement of the flood discharge of a small-sized river using an existing digital video recording system

Tsubaki, Ryota; Fujita, Ichiro; Tsutsumi, Shiho

doi:10.1016/j.jher.2010.12.004

Cited by 80 publications

(59 citation statements)

References 16 publications

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“…To the best of our knowledge, this implementation is the only fixed LSPIV measurement station for continuous monitoring of a river flow. Similar implementations placed underneath bridges and boardwalks have enabled the observation and analysis of selected flood events (Muste et al, 2011;Tsubaki et al, 2011).…”

Section: F Tauro Et Al: a Novel Gauge-cam Station On The Tiber Rivermentioning

confidence: 99%

A novel permanent gauge-cam station for surface-flow observations on the Tiber River

Tauro

Petroselli

Porfiri

et al. 2016

Geosci. Instrum. Method. Data Syst.

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Abstract. Flow monitoring of riverine environments is crucial for hydrology and hydraulic engineering practice. Besides few experimental implementations, flow gauging relies on local water level and surface-flow velocity measurements through ultrasonic meters and radars. In this paper, we describe a novel permanent gauge-cam station for large-scale and continuous observation of surface flows, based on remote acquisition and calibration of video data. Located on the Tiber River, in the center of Rome, Italy, the station captures 1 min videos every 10 min over an area oriented along the river cross section of up to 20.6 × 15.5 m 2 . In a feasibility study, we demonstrate that accurate surface-flow velocity estimations can be obtained by analyzing experimental images via particle tracking velocimetry (PTV). In medium illumination conditions (70-75 lux), PTV leads to velocity estimations in close agreement with radar records and is less affected by uneven lighting than large-scale particle image velocimetry. Future efforts will be devoted to the development of a comprehensive test bed infrastructure for investigating the potential of multiple optics-based approaches for surface hydrology.

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Section: F Tauro Et Al: a Novel Gauge-cam Station On The Tiber Rivermentioning

confidence: 99%

A novel permanent gauge-cam station for surface-flow observations on the Tiber River

Tauro

Petroselli

Porfiri

et al. 2016

Geosci. Instrum. Method. Data Syst.

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show abstract

“…The idea behind the use of video images is that surface flow features composed of surface ripples or floating objects are assumed to be advected with the surface velocity as long as the wind effect is negligible. Among the image-based techniques, such as a large-scale image velocimetry (LSPIV) [13][14][15] or the space-time image velocimetry (STIV) [16][17][18][19][20], STIV seems to be more robust under deteriorated image condition and utilized in the present research. The non-intrusive methods are very useful and effective as they can measure the flow velocity information safely from a remote place.…”

Section: Introductionmentioning

confidence: 99%

Discharge Measurements of Snowmelt Flood by Space-Time Image Velocimetry during the Night Using Far-Infrared Camera

Fujita

2017

Water

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Abstract:The space time image velocimetry (STIV) technique is presented and shown to be a useful tool for extracting river flow information non-intrusively simply by taking surface video images. This technique is applied to measure surface velocity distributions on the Uono River on Honshu Island, Japan. At the site, various measurement methods such as a radio-wave velocity meter, an acoustic Doppler current profiler (ADCP) or imaging techniques were implemented. The performance of STIV was examined in various aspects such as a night measurement using a far-infrared-ray (FIR) camera and a comparison to ADCP data for checking measurement accuracy. All the results showed that STIV is capable of providing reliable data for surface velocity and water discharge that agree fairly well with ADCP data. In particular, it was demonstrated that measurements during the night can be conducted without any difficulty using an FIR camera and the STIV technique. In particular, using the FIR camera, the STIV technique can capture water surface features better than conventional cameras even at low resolution. Furthermore, it was demonstrated that measurements during the night can be conducted without any difficulty.

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“…In relation to flow characteristics, water surface width can be measured from ground-based cameras (Ashmore and Sauks, 2006;Gleason et al, 2015) and correlated with discharge to establish a width-discharge curve in some types of rivers, and local flow velocity has been measured using particle image velocimetry (Creutin et al, 2003;Hauet et al, 2008;Tsubaki et al, 2011;MacVicar et al, 2012;Ran et al, 2016;Stumpf et al, 2016). Direct measurement of stage is less well developed, although Young et al (2015) obtained a water level and discharge record using manual image processing on a small, steep channel using inexpensive groundbased cameras combined with channel geometry and rough-ness assumptions.…”

Section: Introductionmentioning

confidence: 99%

Technical note: Stage and water width measurement of a mountain stream using a simple time-lapse camera

Leduc

Ashmore

Sjogren

2018

Hydrol. Earth Syst. Sci.

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Abstract. Remote sensing applied to river monitoring adds complementary information useful for understanding the system behaviour. In this paper, we present a method for visual stage gauging and water surface width measurement using a ground-based time-lapse camera and a fully automatic image analysis algorithm for flow monitoring at a river cross section of a steep, bouldery channel. The remote stage measurement was coupled with a water level logger (pressure transducer) on site and shows that the image-based method gives a reliable estimate of the water height variation and daily flow record when validated against the pressure transducer (R = 0.91). From the remotely sensed pictures, we also extracted the water width and show that it is possible to correlate water surface width and stage. The images also provide valuable ancillary information for interpreting and understanding flow hydraulics and site weather conditions. This image-based gauging method is a reliable, informative and inexpensive alternative or adjunct to conventional stage measurement especially for remote sites.

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Measurement of the flood discharge of a small-sized river using an existing digital video recording system

Cited by 80 publications

References 16 publications

A novel permanent gauge-cam station for surface-flow observations on the Tiber River

A novel permanent gauge-cam station for surface-flow observations on the Tiber River

Discharge Measurements of Snowmelt Flood by Space-Time Image Velocimetry during the Night Using Far-Infrared Camera

Technical note: Stage and water width measurement of a mountain stream using a simple time-lapse camera

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