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Measuring sand wave migration in the field. Comparison of different data sources and an error analysis

Knaapen, M. A. F., (2005) Measuring sand wave migration in the field. Comparison of different data sources and an error analysis Hulscher, S.J.M.H., Garlan, T. and Idier, D. (eds.) In Proceedings of Marine Sandwave and River Dune Dynamics. American Geophysical Union., pp. 152-159.

Record type: Conference or Workshop Item (Paper)


Migration of offshore seabed waves is hard to measure due to the low migration rates and large measurement errors. Here, sand wave migration rates are determined from the change in the crest position deduced from bathymetric echo-sounding data. The crests are identified as local extremes in a bathymetric profile, after low-pass filtering. This approach is applied to profiles along a pipeline and to 2-dimensional data. A consistent migration rate of several meters per year is found. The accuracy of the estimates is analyzed using markers. The noise in the bed level data is small and does not affect the results, but the errors in the positioning system cause significant errors in the estimates rates. An increase of either the number of surveys or the observation period reduces these errors

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Published date: 2005
Venue - Dates: Marine Sandwave and River Dune Dynamics, Netherlands, 2005-01-01


Local EPrints ID: 75785
PURE UUID: f2ae5673-5168-4f67-82ff-f8e2cf6df7ad

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:42

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Author: M. A. F. Knaapen
Editor: S.J.M.H. Hulscher
Editor: T. Garlan
Editor: D. Idier

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