Data collection at U.S. Geological Survey Streamgages

4/17/01


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Table of Contents

Data collection at U.S. Geological Survey Streamgages

The first USGS gaging station was established on the Rio Grande River near Embudo, New Mexico in 1889.

Embudo trainees immediately dispersed to collect data in other western locations

The Embudo Legacy Data collected using nationally consistent, prescribed standards

The U.S. Geological Survey currently collects streamflow data at over 7,000 sites

Historic data from over 18,500 locations can be analyzed with confidence

The basic piece of data collected at gaging stations is Stream Stage

Stage can be sensed using STILLING WELLS

Stage can also be sensed using PRESSURE TRANSDUCERS

Stage is usually:

Most users of streamflow information need to know the discharge of the stream

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Discharge measurements are used to develop rating curves

Discharge must be measured at all stages

Discharge measurements during high stages are particularly important

To maintain ratings, discharge must be measured regularly

Datum must be checked regularly

All gaging station data are checked and reviewed

Data Dissemination-- Historical Data

Electronic Data Dissemination-- Historical Daily-Mean Discharge

Electronic Data Dissemination-- Historic Peak-Flow Data

Data Dissemination-- Real-Time

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Data dissemination-- Real Time

Data Dissemination-- Live Pictures of Gaged Channels

Data from USGS gaging stations can be used to meet a variety of needs

Current needs

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Long-term needs

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USGS continues to pursue use of new technology

The End

Author: K. Michael Nolan and Jeff. V. Phillips

Home Page: http://www.nws.noaa.gov/os/hod