Results 21 to 30 of about 901 (167)

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

, 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, Lewis, Matthew, Masters, Ian, McIlvenny, Jason, Neill, Simon, Reeve, Dominic E., Williamson, Benjamin   +6 more
core   +4 more sources

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

LHB 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, Pierre Brigode, Léa-Linh Liebard, Aubin Chonoski, Étienne Robert, Louis Torchet, Valentin Poveda, Frédérique Leclerc, Jérémy Billant, Gauthier Rousseau, Olivier Delestre   +10 more
doaj   +1 more source

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

Remote 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, Gernot Paulus, Sabine Käfer, Karl-Heinrich Anders, Peter Mayr, Helmut Mader, Ulf Scherling, Rudi Schneeberger   +7 more
doaj   +1 more source

Discharge estimation in small irregular river using LSPIV [PDF]

Proceedings 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., Shiono, K., Chandler, J.H., Rameshwaran, P., Sellin, R.H.J., Fujita, I.   +5 more
openaire   +2 more sources

A Perspective of Surge Dynamics in Natural Debris Flows Through Pulse‐Doppler Radar Observations

Journal of Geophysical Research: Earth Surface, Volume 128, Issue 9, September 2023., 2023
Abstract As a consequence of their natural occurrence and the frequent formation of multiple surges with high sediment loads, debris flows are considered one of the most hazardous gravity‐driven mass movements in mountain regions. Field measurements of surge dynamics are an essential link in the chain of understanding fundamental process dynamics and ...
Tobias Schöffl, Georg Nagl, Richard Koschuch, Helmut Schreiber, Johannes Hübl, Roland Kaitna   +5 more
wiley   +1 more source

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

RBRH
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, Brennda Bezerra Braga, Carlos Alexandre Gomes Costa   +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]

, 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., Dramais, Guillaume, Hauet, A., Jodeau, M., Le Boursicaud, R., Le Coz, J., Marchand, B.   +6 more
core   +4 more sources

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., Mostaghimi, Saied, Vlachos, Pavlos P., Brannan, Kevin M., Dillaha, Theo A. III   +4 more
openaire   +2 more sources

Uncertainties in measuring and estimating water‐budget components: Current state of the science

WIREs Water, Volume 10, Issue 4, July/August 2023., 2023
Water budget data come in a range of spatial and temporal scales and uncertainty levels. In general, point measurements are more certain, and areal estimates which are required for water budgets have higher uncertainty. Data for subsurface storage and fluxes of water have the poorest spatially explicit data availability and highest uncertainty among ...
Sara B. Levin, Martin A. Briggs, Sydney S. Foks, Phillip J. Goodling, Jeff P. Raffensperger, Donald O. Rosenberry, Martha A. Scholl, Claire R. Tiedeman, Richard M. Webb   +8 more
wiley   +1 more source

RivQNet: Deep Learning Based River Discharge Estimation Using Close‐Range Water Surface Imagery

Water Resources Research, Volume 59, Issue 2, February 2023., 2023
Abstract Streamflow data is often the most critical input for hydrologic and hydraulic research, modeling, and design studies. Streamflow measurement using close range non‐contact sensing such as image velocimetry is a new technique that is yet far from maturity.
S. Ansari, C. D. Rennie, E. C. Jamieson, O. Seidou, S. P. Clark   +4 more
wiley   +1 more source