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Price current-meter standard rating development by the U.S. geological survey

Journal of Hydraulic Engineering

By:
, , ,
DOI: 10.1061/(ASCE)0733-9429(2001)127:4(250)

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Abstract

The U.S. Geological Survey has developed new standard rating tables for use with Price type AA and pygmy current meters, which are employed to measure streamflow velocity. Current-meter calibration data, consisting of the rates of rotation of meters at several different constant water velocities, have shown that the original rating tables are no longer representative of the average responsiveness of newly purchased meters or meters in the field. The new rating tables are based on linear regression equations that are weighted to reflect the population mix of current meters in the field and weighted inversely to the variability of the data at each calibration velocity. For calibration velocities of 0.3 m/s and faster, at which most streamflow measurements are made, the new AA-rating predicts the true velocities within 1.5% and the new pygmy-meter rating within 2.0% for more than 95% of the meters. At calibration velocities, the new AA-meter rating is up to 1.4% different from the original rating, and the new pygmy-meter rating is up to 1.6% different.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Price current-meter standard rating development by the U.S. geological survey
Series title:
Journal of Hydraulic Engineering
DOI:
10.1061/(ASCE)0733-9429(2001)127:4(250)
Volume
127
Issue:
4
Year Published:
2001
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
250
Last page:
257
Number of Pages:
8