| 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. |
| Genre: | Article |
| ProdID: | 70023532 |
| Citation Author: | Hubbard, E. F.; Schwarz, G. E.; Thibodeaux, K. G.; Turcios, L. M. |
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| Citation End Page: | 257 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Hydraulic Engineering |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | Price current-meter standard rating development by the U.S. geological survey; 2001; Article; Journal; Journal of Hydraulic Engineering; Hubbard, E. F.; Schwarz, G. E.; Thibodeaux, K. G.; Turcios, L. M. |
| Citation Start Page: | 250 |
| Citation Volume: | 127 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Price current-meter standard rating development by the U.S. geological survey; 2001; Article; Journal; Journal of Hydraulic Engineering; Hubbard, E. F.; Schwarz, G. E.; Thibodeaux, K. G.; Turcios, L. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1061/(ASCE)0733-9429(2001)127:4(250) |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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