Results 31 to 40 of about 600 (156)
Journal of Flood Risk Management, 2021 In order to investigate the relationship between water surface velocity and breach hydrograph, a series of dam breach experiments with a generalised landslide dam were conducted in an open channel of 50 m × 4 m × 2 m.
Jie Liu +4 more
doaj +1 more source
Stream Discharge Measurement Using a Large-Scale Particle Image Velocimetry (LSPIV) Prototype [PDF]
Transactions of the ASABE, 2006 New technologies have been developed for open-channel discharge measurement due to concerns about costs, accuracy, and safety of traditional methods. One emerging technology is large-scale particle image velocimetry (LSPIV). LSPIV is capable of measuring surface velocity by analyzing recorded images of particles added to the stream surface.
Harpold, A. A. +4 more
openaire +2 more sources
LHB Hydroscience JournalMadagascar est régulièrement touchée par des tempêtes tropicales provoquant des crues majeures, qui sont encore peu documentées. L’accès croissant à des vidéos prises par des habitants ouvre de nouvelles perspectives pour estimer les vitesses et les ...
Ambininkasinirina Tahina +4 more
doaj +1 more source
River Surface Velocimetry Based on Virtual River Dataset and Modulated-RAFT
IEEE Access, 2023 In recent years, there has been a surge of interest in image-based velocimetry methods for river surface velocity (RSV) estimation due to their efficiency and accuracy, including large-scale particle image velocimetry (LSPIV), space-time image ...
Yixin Wu +5 more
doaj +1 more source
Image Flow Measurement Based on the Combination of Frame Difference and Fast and Dense Optical Flow
工程科学与技术, 2022 Due to its simplicity, efficiency and safety, image velocimetry has gained widespread attention and is beginning to be used in domestic and international hydrographic stations.
Jianping WANG +4 more
doaj
River Research and Applications, Volume 42, Issue 8, Page 1654-1672, October 2026.ABSTRACT Flow velocity measurement is fundamental to hydrological and hydraulic studies, providing essential data for streamflow estimation and river dynamics analysis. Traditional in situ methods like propeller gauges and acoustic Doppler current profilers are accurate but intrusive and labour‐intensive, while non‐intrusive image processing methods ...
Ghazaleh Nassaji Matin +4 more
wiley +1 more source
スマートフォンを用いたLSPIV観測システムの開発 [PDF]
, 2015 A mobile system for LSPIV (large-scale particle image velocimetry) measurement is developed. The system consists of commercially available smartphone device and LSPIV application software.
Muste, Marian +5 more
core +1 more source
Hydrodynamic and ecological effects of engineered logjams: Insights from field observations
Earth Surface Processes and Landforms, Volume 51, Issue 6, June 2026.Drone imaging, LSPIV and electrofishing data quantified restoration effects of engineered logjam at the Emme River (Switzerland). Placement and discharge shaped flow: Side jams created longer wakes, centre jams stronger mixing; and lower discharge intensified gap velocities, whereas wake length remained stable.
Felix Broß +2 more
wiley +1 more source
Ecohydrology, Volume 19, Issue 3, April/May 2026.ABSTRACT Performing ecohydraulic assessments of salmon habitat is essential for planning and evaluating management actions. Current in situ and modelling approaches, although accurate, can be time‐consuming and expensive, which limits the areal extent of the study.
Jared G. Stieve +2 more
wiley +1 more source
Revista de TeledetecciónThis study is motivated by the difficulty of applying experimental techniques to characterize base flows in mountain rivers. Intrusive instruments are not optimal for measuring low flow rates, as they require a minimum depth to be submerged and to ...
Santiago A. Ochoa-García +4 more
doaj +1 more source