Results 51 to 60 of about 901 (167)

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

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

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.
Ichiro Fujita, Takeharu Nakashima
openaire   +2 more sources

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

Peligro de los raudales para los usuarios de la vía pública en ciudades del Paraguay

Revista de la Sociedad Científica del Paraguay, 2018
Los raudales/avenidas en el Paraguay causan a menudo grandes problemas en las calles de las ciudades, no solamente importantes daños materiales, si no también causan decesos humanos, arrastrando vehículos y personas. Esta alarmante situación, nos llevó a
Adriana Ruiz Diaz Cardoso, Alfredo López Fernández, Edith Camaño Schettini   +2 more
doaj   +1 more source

Large-scale PIV surface flow measurements in shallow basins with different geometries [PDF]

, 2018
Shallow depth flow fields and low velocity magnitudes are often challenges for traditional velocity measuring instruments. As such, new techniques have been developed that provide more reliable velocity measurements under these circumstances.
Kantoush, S., Schleiss, A.
core  

Using a 2D shallow water model to assess Large-Scale Particle Image Velocimetry (LSPIV) and Structure from Motion (SfM) techniques in a street-scale urban drainage physical model [PDF]

, 2019
Versión aceptada de https://doi.org/10.1016/j.jhydrol.2019.05.003[Abstract:] Physically-based numerical modelling of surface processes in urban drainage, such as pollutant wash-off or the assessment of flood risks, requires appropriate calibration and ...
Anta, Jose, Naves, Juan, Puertas, Jerónimo, Regueiro-Picallo, Manuel, Suárez-López, Joaquín   +4 more
core   +1 more source

Aplicación de la técnica LSPIV en el diseño hidrológico de infraestructura hídrica

Cuadernos de Ingeniería, 2020
En este trabajo se implementa una nueva técnica de medición decaudales en la provincia de Salta. Los flujos que ocurren durantecrecidas repentinas en ríos de montaña, (como lo son la mayoría delos casos en Salta), presentan algunas características particularesque hacen que tecnologías intrusivas de velocimetría (tales comomolinetes convencionales o ...
Myriam Cecilia Botelli, Nicolás Federico Guillén, Carlos Marcelo García, Antoine Patalano, Marcelo Chalabe   +4 more
openaire   +2 more sources

Wind Stress Effects on Drone‐Based Thermal Infrared Surface Velocimetry Measurements of Tidal Flow in an Estuary

Water Resources Research, Volume 61, Issue 9, September 2025.
Abstract We evaluate the effect of surface wind stress on remote velocimetry measurements of tidal flow by comparing these measurements to the bulk flow velocity measured by a co‐located acoustic velocity profiler in a tidal channel. The remote velocity measurements are made with a thermal imager mounted on a drone hovering directly over the acoustic ...
Evan T. Heberlein, Marc Mayes, Bryn E. Morgan, Kelly K. Caylor, Seth A. Schweitzer, Edwin A. Cowen   +5 more
wiley   +1 more source

Uncovering fine‐scale surface flow dynamics with particle tracking velocimetry: A new benchmark for soil erosion modelling

Earth Surface Processes and Landforms, Volume 50, Issue 9, Page 1-18, July 2025.
This study introduces a camera‐based approach for distributed, high‐resolution flow velocity measurements during artificial rainfall simulations, using particle tracking velocimetry (PTV). The results demonstrate PTV's potential as a robust and easily implementable tool for improving runoff model assessment and process understanding at small scales ...
Lea Epple, Anne Bienert, Oliver Grothum, Jonas Lenz, Anette Eltner   +4 more
wiley   +1 more source