Advisory Committee on Water Information Streamgaging Task Force
USGS Streamgaging Program
description
Transcript of USGS Streamgaging Program
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USGS Streamgaging Program
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Streamgage Operation
•Gage height (not discharge) is collected every 15 minutes.•Transmitted once an hour via GOES
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Streamgage Operation• Sites are measured approximately 9 times per year. • Use measurements to determine stage-discharge relationship• Also use measurements to determine “shifts” to the rating• Measurements are also used to aid in estimating flows.
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Traditional method: AA and pygmy meters
HydroAcoustics
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Streamgage Operation• Gaging “natural” channels in most cases. • Subject to change through time – scour, fill, vegetation growth• Records are given a rating as reviewed and approved (incrementally), excellent (+/- 5% - about 95% of the daily discharges are within 5% of the true value), good (+/- 10%) fair (> 15%), etc.
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Streamgage Operation•Data is most accurate just before and after measurements.
• Real-time data displayed on the web is provisional and subject to change.
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Streamgage Operation•Daily data approved incrementally during the year.
• Published after end of WY.
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WaterAlert
• Threshold notification system.•Subscribe on station page.• Sends email or text.• Hourly or daily.• Works for:
• Stage• Discharge• QW parameters
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Utah Data Network
• Began in late 1800’s (1889 – Weber R. at Gateway)
• 153 Active streamgages
• 618 Historic streamgages
replace with updated pic.
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Cooperators• Utah Department of Natural Resources
•Division of Water Rights •Division of Water Resources
• Utah DEQ • Central Utah Water Conservancy District • Bear River Commission • NSIP • U.S. Bureau of Reclamation • BLM • 13 Local entities
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Questions?