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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Special sessions : Quanitfying acoustic doppler current profiler discharge uncertainty: a monte carlo based tool for mo...
Quanitfying acoustic doppler current profiler discharge uncertainty: a monte carlo based tool for moving-boat measurements
Author : ELIZABETH C JAMIESON(1), STEPHANIE A MOORE(2), FRANCOIS RAINVILLE(1), COLIN D. RENNIE(3) & DAVID S. MUELLER(4)
ABSTRACT
Assessing and quantifying the uncertainty associated with acoustic Doppler current profiler (ADCP) discharge
measurements remains a significant challenge, given the large number of parameters that affect these measurements
(e.g. instrument configuration, dynamic environment, operator decisions) and the difficulty in understanding their
contribution to overall error or uncertainty. A Matlab based software tool (QUant), which uses Monte Carlo simulations,
was developed to assess the relative contribution of 16 different parameters to the total uncertainty associated with
moving-boat ADCP discharge measurements. Multiple data sets (some with varied site conditions and operator decisions
and others with consistent conditions and operator decisions) were analyzed in order to evaluate the relative contributions
of a range of error sources to the total uncertainty. Results indicated that uncertainty is dominated by the unmeasured
areas of the flow, and in particular invalid data. These results indicate that site selection, which minimizes unmeasured
areas and invalid data, remains important for high quality discharge measurements. This tool provides useful quantitative
feedback on what parameters contribute most to uncertainty, and could be used by operators to determine the quality of
their measurement and highlight what parameters could be modified (or improved) to reduce uncertainty.
File Size : 1,072,826 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Special sessions
Date Published : 19/08/2015
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