Results 41 to 50 of about 163 (140)

CCTV‐Hyperspectral Imaging for Suspended Sediment Transport (HISST): Proof‐of‐Concept for a Continuous Day‐and‐Night Monitoring Approach

Water Resources Research, Volume 61, Issue 10, October 2025.
Abstract Effective sediment monitoring is crucial for managing dynamic river environments where suspended sediment transport varies over time. However, manual sampling and turbidity sensor‐based methods provide limited spatial coverage and can be labor‐intensive.
Siyoon Kwon, Hyoseob Noh, Il Won Seo, Yun Ho Lee   +3 more
wiley   +1 more source

Baseflow measurement in mountain rivers using LSPIV: A case study of the Tarqui and Yanuncay rivers in the Ecuadorian Andes

Revista de Teledetección
This 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, Leandro Massó, Antoine Patalano, Carlos M. Matovelle-Bustos, Paola V. Delgado-Garzón   +4 more
doaj   +1 more source

Wind Stress Effects on Drone‐Based Thermal Infrared Surface Velocimetry Measurements of Tidal Flow in an Estuary

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, Marc Mayes, Bryn E. Morgan, Kelly K. Caylor, Seth A. Schweitzer, Edwin A. Cowen   +5 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, Panayiotis Dimitriadis, Katerina Mazi, Spyridon Lykoudis, Antonis Koussis   +4 more
doaj   +1 more source

Uncovering fine‐scale surface flow dynamics with particle tracking velocimetry: A new benchmark for soil erosion modelling

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, Anne Bienert, Oliver Grothum, Jonas Lenz, Anette Eltner   +4 more
wiley   +1 more source

Image analysis of large-scale recirculating river flow by LSPIV

Journal of the Visualization Society of Japan, 1999
Large scale recirculating flow in a river was measured by a new image analysis method, Large Scale Particle Image Velocimetry (LSPIV), proposed by one of the authors. In this method, oblique-angled video images of river surface flow visualized by special tracer can be analyzed by PIV after the geometric image transformation.
Fujita, Ichiro, Nakashima, Takeharu
openaire   +2 more sources

Floodplain Vegetation Density Effects on Meandering Channel Flow Patterns and Channel‐Floodplain Hydraulic Exchange

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, Ryan R. Morrison, Peter A. Nelson   +2 more
wiley   +1 more source

Gravel Replenishment Downstream of Dams: Insights From a Flume Experiment in a Straight Embanked Channel

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, Guillaume Brousse, Magali Jodeau   +2 more
wiley   +1 more source

Assessment of 3D-RANS models for the simulation of topographically forced shallow flows

Journal of Hydrology and Hydromechanics, 2016
In this work the performance of Reynolds Averaged Navier-Stokes (RANS) simulations to predict the flow structure developed by the presence of a sidewall obstacle in a uniform open-channel shallow flow is discussed. The tested geometry was selected due to
Safarzadeh Akbar, Brevis Wernher
doaj   +1 more source

Understanding Tidal Jet Vortices Over Complex Bathymetry via Numerical Modeling and Drone Observation: Match and Mismatch in the Vortex Dynamics Under Idealized and Realistic Topographic Settings

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, Byoungjoon Na, Sangyoung Son   +2 more
wiley   +1 more source