Results 51 to 60 of about 163 (140)

Combining hydroacoustics and large-scale particle image velocimetry: Flow dynamics at Hiitolanjoki River restoration site in Southeast Finland

Journal of Hydrology: Regional Studies
Study region: Finland’s largest dam removal project at Hiitolanjoki River restoration site provides a unique opportunity to assess the hydraulic impacts of river restoration.
Kerstin Schlobies, Juha-Matti Välimäki, Tuure E. Takala, Marko Kärkkäinen, Anton Kuzmin, Eliisa S. Lotsari   +5 more
doaj   +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

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

The impacts of low flow, ice‐cover and ice thickness on sediment load in a sub‐arctic river – Modelling sediment transport with particle image velocimetry calibration data sets

Earth Surface Processes and Landforms, Volume 49, Issue 6, Page 1954-1968, May 2024.
Image‐based river sediment transport simulations show a significant decrease in flow velocity and sediment load in ice‐covered river conditions compared to open‐water low‐flow conditions. When an additional increase in ice thickness was simulated, bedload increased because the thicker ice narrowed the river channel substantially.
Virpi Pajunen, Eliisa Lotsari, Juha‐Matti Välimäki, Franziska Wolff, Marko Kärkkäinen, Linnea Blåfield, Anette Eltner   +6 more
wiley   +1 more source

Large-Scale Particle Image Velocimetry (LSPIV) of aeolian sand transport patterns [PDF]

Aeolian Research, 2018
Abstract This paper presents results of laboratory testing and proof-of-concept field deployment of large-scale particle image velocimetry (LSPIV) using a consumer-level digital video camera to measure advection velocities of streamers and sand transport patterns over a beach surface.
Baas, Andreas C.W., van den Berg, Fabien
openaire   +3 more sources

Turbulent flow dynamics and mass transport processes in a natural surface storage zone using field data and numerical simulations

E3S Web of Conferences, 2018
In this work, the turbulent flow dynamics and mass transport mechanisms in a natural SSZis analyzed. The study site is a river reach of the Lluta River, located in northern Chile in a high-altitude Andean environment known as the Altiplano (~ 4,000 masl)
Sandoval Jorge, Escauriaza Cristián, Mignot Emmanuel, Mao Luca   +3 more
doaj   +1 more source

2D and 3D Computational Modeling of Surface Flooding in Urbanized Floodplains: Modeling Performance for Various Building Layouts

Water Resources Research, Volume 60, Issue 5, May 2024.
Abstract Understanding the strengths and limitations of the modeling capacity of surface flooding in urbanized floodplains is of utmost importance as such events are becoming increasingly frequent and extreme. In this study, we assess two computational models against laboratory observations of surface urban flooding in a reduced‐scale physical model of
Xuefang Li, Guilhem Dellinger, Sébastien Erpicum, Lihua Chen, Shuyue Yu, Léo Guiot, Pierre Archambeau, Michel Pirotton, Benjamin Dewals   +8 more
wiley   +1 more source

MEASUREMENT OF INUNDATING FLOW FROM A BROKEN ENBANKMENT BY USING VIDEO IMAGES SHOOT FROM A MEDIA HELICOPTER

E3S Web of Conferences, 2018
The heavy rain disaster in the Kinugawa River basin that occurred along with the passage of the Typhoon 18 caused the embankment destruction in the middle reach of the river on September 10, 2015.
Fujita Ichiro, Notoya Yuichi, Furuta Takanori   +2 more
doaj   +1 more source

Remote sensing of laboratory rivers

Earth Surface Processes and Landforms, Volume 49, Issue 1, Page 58-81, January 2024.
Remote sensing can be adapted for the lab to monitor the evolution of physical experiments without disrupting their processes. We review ways to deploy ‘remote sensing’ for experiments in fluvial geomorphology. We hope this paper will be helpful for experimentalists who want to collect data both continuously and cost‐effectively.
Anya S. Leenman, Brett C. Eaton
wiley   +1 more source

STANDARD FOR APPLICATION METHOD OF LSPIV TO SURFACE VIDEO RECORD OF ACTUAL FLOOD FLOW

PROCEEDINGS OF HYDRAULIC ENGINEERING, 2007
Using a surface video record of a large-scale flood in Yoshino River, Shikoku, Japan, some problems related to application method of Large Scale Particle Image Velocimetry (LSPIV) are examined in detail. First, from a hydraulic point of view, a new method is proposed for exclusion of incorrect velocity data and calculation of time-averaged velocity ...
OKABE, Takeshi, FUJITA, Ichiro, TSUBAKI, Ryota, WAKUDA, Atsushi   +3 more
openaire   +2 more sources