Conference proceeding
Traceless Quantitative Imaging Alternatives for Free-Surface Measurements in Natural Streams
Hydraulic measurements and experimental methods, 2002 : proceedings of the specialty conference, July 28-August 1, 2002, Estes Park, Colorado
2002
Abstract
Flow measurements provided by the extensive streamgage networks worldwide are crucial for river monitoring in hydrology, fluvial geomorphology, and riverine ecology. However, the current measurements methods are technically outdated and require equipment deployment at the measurement location. An extensive search of new, non-contact technologies, with special emphasis on those pertaining to the new generation of digital instruments, has been pioneered by United States by US Geological Survey that potentially might change the paradigm in stream data collection program. Preliminary tests in field conditions illustrated that the ground penetrating radar (for bathymetry measurements) combined with microwave mono- or bi-static radar (for free-surface velocity measurements) have the potential to yield remotely, non-contact, river discharges in real-time. Another potential candidate for free-surface measurements in the attention of the committee is the Large-Scale Particle Image Velocimetry (LSPIV). LSPIV is a relatively new approach for remote, real-time flow visualization and measurement of the flow free surface based on digital imagery. Among the distinct advantages of LSPIV over other means for river flow estimation are its capabilities to provide instantaneous whole-field velocity vectors and to measure in extreme river flow conditions, i.e., floods, partially ice-covered flows, and low velocity flows. Visualization and quantitative measurement of river flow features using LSPIV can be made quickly, with little site preparation or pre-planning, and for extended time spans. The major shortcoming of the LSPIV currently applied in natural settings is the need for seeding of the stream free surface in order to detect its motion. The present paper discusses alternatives for implementation of unseeded LSPIV.
Details
- Title: Subtitle
- Traceless Quantitative Imaging Alternatives for Free-Surface Measurements in Natural Streams
- Creators
- J CreutinM MusteZ. Li
- Resource Type
- Conference proceeding
- Publication Details
- Hydraulic measurements and experimental methods, 2002 : proceedings of the specialty conference, July 28-August 1, 2002, Estes Park, Colorado
- Publisher
- American Society of Civil Engineers; Reston, Va.
- Language
- English
- Date published
- 2002
- Academic Unit
- Geographical and Sustainability Sciences; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984459637502771
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