Results 31 to 40 of about 1,225 (192)

Analysis of the Impact Area of the 2022 El Tejado Ravine Mudflow (Quito, Ecuador) from the Sedimentological and the Published Multimedia Documents Approach [PDF]

open access: yesGeoHazards
Quito (Ecuador) has a history of mudflow events from ravines that pose significant risks to its urban areas. Located close to the Pichincha Volcanic Complex, on 31 January 2022, the northwest and central parts of the city were hit by a mudflow triggered ...
Liliana Troncoso   +9 more
doaj   +3 more sources

Large-Scale Particle Image Velocimetry to Measure Streamflow from Videos Recorded from Unmanned Aerial Vehicle and Fixed Imaging System

open access: yesRemote Sensing, 2021
The accuracy of river velocity measurements plays an important role in the effective management of water resources. Various methods have been developed to measure river velocity.
Wen-Cheng Liu   +2 more
doaj   +1 more source

Crue du 23 novembre 2019 sur la Côte d’Azur : comparaison de débits estimés par analyse d’images et par modélisation hydrologique

open access: yesLHB Hydroscience Journal, 2022
Les précipitations courtes et violentes observées sur la Côte d’Azur conduisent souvent à des crues-éclairs sur les bassins versants côtiers : lors de la crue du 2 octobre 2015, un débit de pointe compris entre 185 et 295 m3/s a été estimé sur la Brague ...
Sarah Vigoureux   +10 more
doaj   +1 more source

Drone-Based Optical Measurements of Heterogeneous Surface Velocity Fields around Fish Passages at Hydropower Dams

open access: yesRemote Sensing, 2020
In Austria, more than a half of all electricity is produced with the help of hydropower plants. To reduce their ecological impact, dams are being equipped with fish passages that support connectivity of habitats of riverine fish species, contributing to ...
Dariia Strelnikova   +7 more
doaj   +1 more source

Discharge estimation in small irregular river using LSPIV [PDF]

open access: yesProceedings of the Institution of Civil Engineers - Water Management, 2010
This paper reports on an estimation method used to quantify discharge in the small irregular channel of the River Blackwater, using large-scale particle image velocimetry (LSPIV). The test reach (250 m × 60 m) consists of relatively straight and multiple meander channels, with a bankfull depth of 0·90 m and a base width of 4·25 m.
Sun, X.   +5 more
openaire   +2 more sources

Comparison of dense optical flow and PIV techniques for mapping surface current flow in tidal stream energy sites [PDF]

open access: yes, 2022
Marine renewable energy site and resource characterisation, in particular tidal stream energy, require detailed flow measurements which often rely on high-cost in situ instrumentation which is limited in spatial extent.
Fairley, Ian   +6 more
core   +4 more sources

Optical Methods for River Monitoring: A Simulation-Based Approach to Explore Optimal Experimental Setup for LSPIV

open access: yesWater, 2021
Recent advances in image-based methods for environmental monitoring are opening new frontiers for remote streamflow measurements in natural environments. Such techniques offer numerous advantages compared to traditional approaches.
D. Pumo   +3 more
semanticscholar   +1 more source

Efficiency in river discharge measurement: combining Chiu’s method with particle image velocimetry techniques [PDF]

open access: yesRBRH
This study evaluated the efficiency of combining Large-Scale Particle Image Velocimetry (LSPIV) with Chiu’s entropy method to estimate river discharge in the Brazilian semi-arid region.
Rodrigo Mendes Rodrigues   +2 more
doaj   +1 more source

Application de la méthode LSPIV pour la mesure de champs de vitesse et de débits de crue sur modèle réduit et en rivière [PDF]

open access: yes, 2013
International audienceLSPIV technique enables the measurement of surface flow velocities using image sequence analysis. EDF and Irstea partnership made possible the development of Fudaa‑LSPIV freeware by DeltaCAD Company.
Die Moran, A.   +6 more
core   +4 more sources

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