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Calibration and testing of selected portable flowmeters for use on large irrigation systems

Water-Resources Investigations Report 80-72

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Abstract

Existing methods for measuring discharge of irrigation systems in the High Plains region are not suitable to provide the pumpage data required by the High Plains Regional Aquifer System Analysis. Three portable flowmeters that might be suitable for obtaining fast and accurate discharge measure-ments on large irrigation systems were tested during 1979 under both laboratory and field conditions: propeller type gated-pipe meter, a Doppler meter, and a transient-time meter.

The gated-pipe meter was found to be difficult to use and sensitive to particulate matter in the fluid. The Doppler meter, while easy to use, would not function suitably on steel pipe 6 inches or larger in diameter, or on aluminum pipe larger than 8 inches in diameter. The transient-time meter was more difficult to use than the other two meters; however, this instrument provided a high degree of accuracy and reliability under a variety of conditions. Of the three meters tested, only the transient-time meter was found to be suitable for providing reliable discharge measurements on the variety of irrigation systems used in the High Plains region.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Calibration and testing of selected portable flowmeters for use on large irrigation systems
Series title:
Water-Resources Investigations Report
Series number:
80-72
Year Published:
1980
Language:
English
Publisher:
U.S. Geological Survey
Description:
iv, 21 p.
Country:
United States
State:
High Plains Aquifer