Results 31 to 40 of about 166 (142)

Image Flow Measurement Based on the Combination of Frame Difference and Fast and Dense Optical Flow

工程科学与技术, 2022
Due to its simplicity, efficiency and safety, image velocimetry has gained widespread attention and is beginning to be used in domestic and international hydrographic stations.
Jianping WANG, Rui ZHU, Guo ZHANG, Xingbo HE, Rupeng CAI   +4 more
doaj  

Deep Learning-Enhanced LSPIV for Automated Non-Contact River Surface Velocity Monitoring in Urban Channels

Applied Sciences
Reliable, real-time river flow monitoring is essential for disaster prevention, but traditional in situ methods are costly and high-risk. Large-scale particle image velocimetry (LSPIV) offers a non-contact alternative, though its accuracy is often ...
Yao-Min Fang, Fu-Jen Chien, Tien-Yin Chou   +2 more
doaj   +1 more source

Hydrodynamic and ecological effects of engineered logjams: Insights from field observations

Earth Surface Processes and Landforms, Volume 51, Issue 6, June 2026.
Drone imaging, LSPIV and electrofishing data quantified restoration effects of engineered logjam at the Emme River (Switzerland). Placement and discharge shaped flow: Side jams created longer wakes, centre jams stronger mixing; and lower discharge intensified gap velocities, whereas wake length remained stable.
Felix Broß, Clémence Dorthe, Isabella Schalko   +2 more
wiley   +1 more source

Linking Remotely Sensed Hydromorphological Conditions With Biological Observations to Estimate Salmon Spawning Capacity

Ecohydrology, Volume 19, Issue 3, April/May 2026.
ABSTRACT Performing ecohydraulic assessments of salmon habitat is essential for planning and evaluating management actions. Current in situ and modelling approaches, although accurate, can be time‐consuming and expensive, which limits the areal extent of the study.
Jared G. Stieve, Daniel S. Auerbach, Alexander K. Fremier   +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

Tracking Floating Wood During a Flood: New Insights From Drone Surveys and Machine Learning

Journal of Geophysical Research: Earth Surface, Volume 130, Issue 11, November 2025.
Abstract Instream large wood (LW) plays a vital role in river morphology and ecology, but its transport can pose risks to infrastructure during floods. Monitoring LW transport during flood events remains limited due to technical and logistical limitations.
J. Aarnink, A. Fornari, F. Rouge, G. Ceriotti, V. Ruiz‐Villanueva   +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

Combined use of LS-PIV and CFD for the characterization of turbulent flow in the contact chamber of ‘COSTA AZUL’ wastewater treatment plant, Carlos Paz

Journal of Hydroinformatics, 2021
The Costa Azul wastewater treatment plant is situated in Carlos Paz city (Córdoba, Argentina). The treated water is discharged to the San Roque reservoir, which is the source of water for the city of Córdoba and surrounding towns.
Ragessi I. Matias, Leyria Rainieri Gianina, Ganancias Facundo, García C. Marcelo, Di Buo Melina, Balangero Bottazzi Gerardo   +5 more
doaj   +1 more source

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

Metrics for the Quantification of Seeding Characteristics to Enhance Image Velocimetry Performance in Rivers

Remote Sensing, 2020
River flow monitoring is essential for many hydraulic and hydrologic applications related to water resource management and flood forecasting. Currently, unmanned aerial systems (UASs) combined with image velocimetry techniques provide a significant low ...
Silvano Fortunato Dal Sasso, Alonso Pizarro, Salvatore Manfreda   +2 more
doaj   +1 more source