Results 121 to 130 of about 600 (156)

Advantages of a mobile LSPIV method for measuring flood discharges and improving stage–discharge curves [PDF]

Journal of Hydro-Environment Research, 2011
Abstract This paper investigates the potential of fast flood discharge measurements conducted with a mobile LSPIV device. LSPIV discharge measurements were performed during two hydrological events on the Arc River, a gravel-bed river in the French Alps: a flood greater than the 10-year return period flood in May, 2008, and a reservoir flushing ...
Alexandre Hauet, Jérôme Le Coz, Benoit Camenen   +2 more
exaly   +5 more sources

Performance of image-based velocimetry (LSPIV) applied to flash-flood discharge measurements in Mediterranean rivers

Journal of Hydrology, 2010
[Departement_IRSTEA]Eaux [TR1_IRSTEA]ARCEAUFlash-floods that occur in Mediterranean regions result in significant casualties and economic impacts. Remote image-based techniques such as Large-Scale Particle Image Velocimetry (LSPIV) offer an opportunity ...
Jérôme Le Coz, Benoit Camenen
exaly   +2 more sources

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Stereo-imaging LSPIV (SI-LSPIV) for 3D water surface reconstruction and discharge measurement in mountain river flows

Journal of Hydrology, 2019
Abstract Large-Scale Particle Image Velocimetry (LSPIV) has been successfully applied for stream flow and flood measurements. In most LSPIV studies, the water surface has been approximated as a two-dimensional planar surface. Errors may arise due to this approximation for flows in steep channels and with complex riverbed topography, especially for ...
Liao Qian, Qihua Ran
exaly   +2 more sources

Application of an Automated Discharge Imaging System and LSPIV during Typhoon Events in Taiwan

Water (Switzerland), 2018
An automated discharge imaging system (ADIS), which is a non-intrusive and safe approach, was developed for measuring river flows during flash flood events.
Chih-Chieh Young, Wei-Che Huang, Wen-Cheng Liu   +2 more
exaly   +3 more sources

Application of Large Scale Particle Image Velocimetry (LSPIV) to Identify Flow Pattern in a Channel [PDF]

Procedia Engineering, 2015
This study has three main goals, first, to map the flow structure in a channel using a unique technique named Large Scale Particle Image Velocimetry (LSPIV).
Tommy Sutarto
exaly   +2 more sources

Increasing LSPIV performances by exploiting the seeding distribution index at different spatial scales [PDF]

Journal of Hydrology, 2021
Image-based approaches for surface velocity estimations are becoming increasingly popular because of the increasing need for low-cost river flow monitoring methods. In this context, seeding characteristics and dynamics along the video footage represent one of the key variables influencing image velocimetry results.
Ian Maddock, Salvatore Manfreda, Alonso Vicente Pizarro Valdebenito   +2 more
exaly   +4 more sources

The Use of LSPIV to Measure Large Streamwise Vortices

World Environmental and Water Resource Congress 2006, 2006
The impact of large streamwise vortices or macroturbulence upon suspended sediment transport and mobility of aquatic species is well recognized. In order to advance the understanding of large streamwise vortices, it is increasingly important to map the turbulent structures on a large scale domain such as for a total river reach.
J. F. Fox, A. Patrick, S. Wood
openaire   +1 more source

Verification and Application of Surface-Velocity Measurement Method Using LSPIV [PDF]

Journal of Korea Water Resources Association, 2004
The purpose of this study is to verify LSPIV technique. Verification was made using moving cart with known velocity. The difference of velocity values obtained using these methods are within 5％, which means that LSPIV can be used in the field with ...
Young-Geun Kim, Young-Sin Roh, Byung-Man Yoon   +2 more
exaly   +2 more sources

Augmenting LSPIV Surface Current Measurement with Drifting ASVs

2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), 2018
Large Scale Particle Image Velocimetry (LSPIV) has been successfully used in the field to gather water surface flow data, which is critical to understanding complex geomorphic, hydrologic, and ecological river processes. Its success, however, depends on lighting conditions and adequate flow seeding with trackable debris or visual features, that can be ...
Christopher Tomaszewski, Paul Scerri, John Dolan   +2 more
openaire   +1 more source

River surface target enhancement and background suppression for unseeded LSPIV

Flow Measurement and Instrumentation, 2013
Abstract Large-Scale Particle Image Velocimetry (LSPIV) is an image-based technique for nonintrusive streamflow monitoring, where the visibility of flow tracers is one of the main limitations to its application in field conditions. Based on the target characteristics of flow tracers as well as the optical environment of river surface, the paper ...
Lizhong Xu, Tanghuai Fan
exaly   +2 more sources