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  3. Field measurements of flow velocity and optical image sequences acquired from the Salcha and Tanana Rivers in Alaska in 2018 and 2019 and used for particle image velocimetry (PIV)
  4. High-resolution image sequence from the Salcha River, Alaska, August 31, 2018, for Particle Image Velocimetry

High-resolution image sequence from the Salcha River, Alaska, August 31, 2018, for Particle Image Velocimetry

Dates

Acquisition
2018-08-31

Citation

Legleiter, C.J., and Kinzel, P.J., 2020, Field measurements of flow velocity and optical image sequences acquired from the Salcha and Tanana Rivers in Alaska in 2018 and 2019 and used for particle image velocimetry (PIV): U.S. Geological Survey data release, https://doi.org/10.5066/P9IJ20O4.

Summary

This data release consists of a sequence of high spatial resolution optical images used to derive remotely sensed estimates of surface flow velocity via particle image velocimetry (PIV). These data were acquired from the Salcha River in Alaska on August 31, 2018, along with field measurements of flow velocity used to assess the accuracy of image-derived velocity estimates. The images were obtained using a Hasselblad A6D-100C 100 megapixel digital mapping camera deployed within a pod mounted on the landing gear of a Robinson R44 helicopter. Image sequences were acquired at a frame rate of 1 per second (1 Hz) while the helicopter hovered in a fixed location approximately 200 m above the river. Also within the pod was an ATLANS GPS/Inertial [...]

Contacts

Author :
Carl J Legleiter, Paul J Kinzel
Publisher :
United States Geological Survey
Other :
USGS ScienceBase Team
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

Click on title to download individual files attached to this item.

SalchaImagesMetadata.xml
“Metadata describing the data and how it was obtained and processed.”
Original FGDC Metadata
View 		15.39 KB application/fgdc+xml

“Zip archive containing geo-referenced TIF image sequence and .tfw world files.” 		3.3 GB application/zip
SalchaExampleImage.JPG
“Example high resolution image of the Salcha River used to perform PIV.” 		thumbnail 37.16 KB image/jpeg

Material Request Instructions

For questions concerning this data set, please contact:

Dr. Carl J. Legleiter - cjl@usgs.gov, 303-271-3651
Geomorphology and Sediment Transport Laboratory
United States Geological Survey
4620 Technology Drive, Suite #400
Golden, CO 80403

Purpose

The purpose of this study was to assess the feasibility of inferring flow velocities from optical image sequences acquired from a helicopter hovering above the river by tracking water surface features via Particle Image Velocimetry (PIV) and to develop a modular workflow for performing this type of analysis. Remote sensing of flow velocity could provide a more efficient, cost-effective alternative to conventional field-based methods of measuring velocity and thus become an important component of non-contact approaches to streamgaging. Along with field measurements of flow velocity used for accuracy assessment, these data were used to assess the potential to estimate surface flow velocities in sediment-laden rivers from helicopter-based, hovering image sequences using particle image velocimetry (PIV) techniques.

Rights

Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Example high resolution image of the Salcha River used to perform PIV.
Example high resolution image of the Salcha River used to perform PIV.

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier 10.5066/P9IJ20O4

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