Price Current-Meter Standard Rating Development by the U.S. Geological Survey
This article has a reply.
VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 127, Issue 4
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.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Fulford, J. M. ( 1992). “Characteristics of U.S. Geological Survey discharge measurements for Water Year 1990.” Open-File Rep. 92-493, U.S. Geological Survey, Stennis Space Center, Miss.
2.
Hubbard, E. F., Thibodeaux, K. G., and Duong, M. N. ( 1999). “Quality assurance of U.S. Geological Survey current meters: The Meter Exchange Program, 1988–1998.” Open-File Rep. 99-221, U.S. Geological Survey, Reston, Va.
3.
International Organization for Standardization (ISO). ( 1976). “Liquid flow measurement in open channels—Calibration of rotating-element current-meters in straight open tanks.” ISO 3455, Geneva.
4.
International Organization for Standardization (ISO) ( 1989). “Assessment of uncertainty in the calibration and use of flow measurement devices—Part 1: Linear calibration relationships.” ISO 7066-1, Geneva.
5.
Schneider, V. R., and Smoot, G. F. ( 1976). “Development of a standard rating for the Price pygmy current meter.” U.S. Geological Survey J. of Res., 4(3), 293–297.
6.
Smoot, G. F., and Carter, R. W. (1968). “Are individual current meter ratings really necessary?”J. Hydr. Div., ASCE, 94(2), 391–397.
Information & Authors
Information
Published In
History
Received: Nov 9, 1999
Published online: Apr 1, 2001
Published in print: Apr 2001
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.