Results 41 to 50 of about 166 (142)
Water Resources Research, Volume 61, Issue 9, September 2025.Abstract We evaluate the effect of surface wind stress on remote velocimetry measurements of tidal flow by comparing these measurements to the bulk flow velocity measured by a co‐located acoustic velocity profiler in a tidal channel. The remote velocity measurements are made with a thermal imager mounted on a drone hovering directly over the acoustic ...
Evan T. Heberlein +5 more
wiley +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
Shui kexue jinzhan, 2017 We propose a new method for reconstructing complex surface velocity field in weir flow which is notoriously difficult to measure due to its sharp drop and high fluctuation. The new method is able to map the curved flow surface by two coplanar cameras and
CAO Liekai +4 more
doaj +1 more source
Earth Surface Processes and Landforms, Volume 50, Issue 9, Page 1-18, July 2025.This study introduces a camera‐based approach for distributed, high‐resolution flow velocity measurements during artificial rainfall simulations, using particle tracking velocimetry (PTV). The results demonstrate PTV's potential as a robust and easily implementable tool for improving runoff model assessment and process understanding at small scales ...
Lea Epple +4 more
wiley +1 more source
Peligro de los raudales para los usuarios de la vía pública en ciudades del Paraguay
Revista de la Sociedad Científica del Paraguay, 2018 Los raudales/avenidas en el Paraguay causan a menudo grandes problemas en las calles de las ciudades, no solamente importantes daños materiales, si no también causan decesos humanos, arrastrando vehículos y personas. Esta alarmante situación, nos llevó a
Adriana Ruiz Diaz Cardoso +2 more
doaj +1 more source
Journal of Geophysical Research: Earth Surface, Volume 130, Issue 7, July 2025.Abstract Channel‐floodplain flow interactions are strongly influenced by riparian vegetation characteristics. However, due to the complicated relationships among floods, vegetation, and channel morphodynamics, these interactions are poorly understood. In this study, we investigate the influence of the density of rigid floodplain vegetation on flow in ...
Daniel C. White +2 more
wiley +1 more source
Water Resources Research, Volume 61, Issue 6, June 2025.Abstract Gravel replenishment (GR) is a common strategy to mitigate the negative effects of sediment deficit caused by dam regulation. However, its effectiveness in restoring dam‐regulated embanked gravel‐bed rivers with alternate bars is still unclear.
Junjian Deng +2 more
wiley +1 more source
On the Uncertainty of the Image Velocimetry Method Parameters
Hydrology, 2020 Image velocimetry is a popular remote sensing method mainly because of the very modest cost of the necessary equipment. However, image velocimetry methods employ parameters that require high expertise to select appropriate values in order to obtain ...
Evangelos Rozos +4 more
doaj +1 more source
Journal of Geophysical Research: Oceans, Volume 129, Issue 12, December 2024.Abstract The formation and evolution of tidal jet vortices over complex bathymetry were investigated using numerical modeling and in situ observation. Delft3D FM simulation on an unstructured grid system, complemented by field measurements using recreational drones captured tidal dynamics in the Uldolmok Strait, known for its strong tidal currents up ...
Sooncheol Hwang +2 more
wiley +1 more source
Enhancement of two‐dimensional hydrodynamic modelling based on UAV‐ flow velocity data
Earth Surface Processes and Landforms, Volume 49, Issue 9, Page 2736-2750, July 2024.We calibrated a 2D hydrodynamic model with three calibration sets and used UAV‐derived surface flow velocities and fixed velocity coefficients in an extensive cross‐validation and velocity conversion procedure. Performance varied between straight and meandering river reach, with bathymetry and distance to the channel centre as key factors.
Franziska Wolff +4 more
wiley +1 more source