Results 21 to 30 of about 7,889,125 (241)

Mountain Glacier Flow Velocity Retrieval from Ascending and Descending Sentinel-1 Data Using the Offset Tracking and MSBAS Technique: A Case Study of the Siachen Glacier in Karakoram from 2017 to 2021

open access: yesRemote Sensing, 2023
Synthetic Aperture Radar images have recently been utilized in glacier surface flow velocity research due to their continuously improving imaging technology, which increases the resolution and scope of research.
Qian Liang, Ninglian Wang
doaj   +1 more source

An Analytical Method for Reconstruction of Velocity Profiles using a Multi-Electrode Electromagnetic Flow Meter [PDF]

open access: yes, 2013
An analytical method is developed for the reconstruction of velocity profiles using measured potential distributions obtained around the boundary of a multi-electrode electromagnetic flow meter.
Zhang, Zhichao   +2 more
core   +1 more source

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

open access: yesRemote 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   +2 more
doaj   +1 more source

Aspect angle dependence of the E region irregularity velocity at large flow angles [PDF]

open access: yes, 2007
We present the Doppler velocity observations of 1-m plasma waves in the auroral E region by the Scandinavian Twin Auroral Radar Experiment (STARE) Norway VHF coherent radar in the context of simultaneous and coincident measurements of electron and ion ...
Senior, Andrew   +5 more
core   +4 more sources

Flow and Turbulence driven Water Surface Roughness and Gas Exchange Velocity in Streams

open access: yesE3S Web of Conferences, 2018
Gas exchange velocity in streams and rivers controls fluxes of atmospheric gases across the air-water interface and is commonly related to the turbulence at the water side. Similarly, river flow hydraulics influences the water surface roughness, which is
Noss Christian   +3 more
doaj   +1 more source

Exploiting LSPIV to assess debris-flow velocities in the field [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2018
The assessment of flow velocity has a central role in quantitative analysis of debris flows, both for the characterization of the phenomenology of these processes and for the assessment of related hazards. Large-scale particle image velocimetry (LSPIV)
J. I. Theule   +5 more
doaj   +1 more source

Current velocity from surface drifter SVP_7708094

open access: yes, 2006
Water temperature and current velocity from surface drifter ...
WOCE Surface Velocity Program, SVP   +1 more
core   +1 more source

A new method for reconstructing velocity field in weir flow based on binocular stereovision and particle image velocimetry

open access: yesShui kexue jinzhan, 2017
We propose a new method for reconstructing complex surface velocity field in weir flow which is notoriously difficult to measure due to its sharp drop and high fluctuation. The new method is able to map the curved flow surface by two coplanar cameras and
CAO Liekai   +4 more
doaj   +1 more source

Analysis of the Velocity Distribution in Partially-Filled Circular Pipe Employing the Principle of Maximum Entropy. [PDF]

open access: yesPLoS ONE, 2016
The flow velocity distribution in partially-filled circular pipe was investigated in this paper. The velocity profile is different from full-filled pipe flow, since the flow is driven by gravity, not by pressure.
Yulin Jiang, Bin Li, Jie Chen
doaj   +1 more source

Effect of Crest Roughness on Flow Characteristics over Circular Weirs [PDF]

open access: yesCivil Engineering Infrastructures Journal, 2013
Different construction materials with different roughness used to make circular weirs highly affect surface roughness and, in turn, flow hydraulics passing over these structures.
Rasoul Ghobadian   +3 more
doaj   +1 more source

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