Results 61 to 70 of about 901 (167)

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

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

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

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

ACOUSTIC MAPPING VELOCIMETRY PROOF-OF-CONCEPT EXPERIMENT [PDF]

, 2015
Knowledge of sediment dynamics in rivers is of great importance for various practical purposes. Despite its high relevance in riverine environment processes, the monitoring of sediment rates remains a major and challenging task for both suspended and ...
Baranya, Sándor, Ho, Hao-Che, Kim, Dongsu, Law, Danielle, Muste, Marian, Tsai, Heng-Wei, Tsubaki, Ryota   +6 more
core  

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 ...
Dramais, Guillaume, Le Coz, J., Camenen, B., Hauet, A.   +3 more
openaire   +3 more sources

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

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

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, Eliisa Lotsari, Diana Spieler, Melanie Elias, Anette Eltner   +4 more
wiley   +1 more source

UAVs for Hydrologic Scopes: Application of a Low-Cost UAV to Estimate Surface Water Velocity by Using Three Different Image-Based Methods

Drones, 2019
Stream velocity and flow are very important parameters that must be measured accurately to develop effective water resource management plans. There are various methods and tools to measure the velocity but, nowadays, image-based methods are a promising ...
Paschalis Koutalakis, Ourania Tzoraki, George Zaimes   +2 more
doaj   +1 more source