Quantifying uncertainty in discharge measurements: A new approach
By: J.E. Kiang, T.A. Cohn, and R.R. Mason
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Abstract
The accuracy of discharge measurements using velocity meters and the velocity-area method is typically assessed based on empirical studies that may not correspond to conditions encountered in practice. In this paper, a statistical approach for assessing uncertainty based on interpolated variance estimation (IVE) is introduced. The IVE method quantifies all sources of random uncertainty in the measured data. This paper presents results employing data from sites where substantial over-sampling allowed for the comparison of IVE-estimated uncertainty and observed variability among repeated measurements. These results suggest that the IVE approach can provide approximate estimates of measurement uncertainty. The use of IVE to estimate the uncertainty of a discharge measurement would provide the hydrographer an immediate determination of uncertainty and help determine whether there is a need for additional sampling in problematic river cross sections. ?? 2009 ASCE.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Quantifying uncertainty in discharge measurements: A new approach |
| ISBN | 9780784410363 |
| DOI | 10.1061/41036(342)599 |
| Volume | 342 |
| Year Published | 2009 |
| Language | English |
| Larger Work Title | Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers |
| First page | 5924 |
| Last page | 5931 |
| Conference Title | World Environmental and Water Resources Congress 2009: Great Rivers |
| Conference Location | Kansas City, MO |
| Conference Date | 17 May 2009 through 21 May 2009 |
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