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Long-term evolution of sand waves in the Marsdiep inlet. I: High-resolution observations

Long-term evolution of sand waves in the Marsdiep inlet. I: High-resolution observations
Long-term evolution of sand waves in the Marsdiep inlet. I: High-resolution observations
A seven-year long data set from 1998 to 2005 of sand waves in the Marsdiep tidal inlet in the Netherlands is presented. The sand waves are visible on digital terrain models (DTMs) that were compiled from water depths obtained with a ferry-mounted acoustic Doppler current profiler. This multi-year data set allows to study the spatial and temporal evolution of sand-wave migration, height, length, asymmetry, and orientation. Horizontal migration rates were successfully obtained with a simple cross-correlation technique similar to techniques used in particle tracking. The study area can be divided in roughly two halves. In the southern half of the inlet, the sand waves are of the progressive type with area-mean heights of about 3 m and lengths of about 190 m. In the northern half, the sand waves are asymmetrical-trochoidal with area-mean heights of about 2 m and lengths of about 165 m. Across the inlet, the sand waves migrate in the flood direction with rates between 0 and . Only the progressive waves in the southern half migrate in directions perpendicular to their crests. A striking observation is the seasonal variability in height and migration of the sand waves in the northern half of the inlet. The sand-wave heights are about 0.5 m higher in fall than in spring and the migration rates are about higher in winter than in summer. This paper only presents observations and analysis techniques. In a subsequent paper, the ADCP-current data will be applied to explain the spatial and seasonal variability of the sand waves.

0278-4343
1190-1201
Buijsman, Maarten C.
aa986b6b-6194-45de-a72c-39a44f205d81
Ridderinkhof, Herman
c2ae903b-c67b-4695-b7cc-71a29c7b5a94
Buijsman, Maarten C.
aa986b6b-6194-45de-a72c-39a44f205d81
Ridderinkhof, Herman
c2ae903b-c67b-4695-b7cc-71a29c7b5a94

Buijsman, Maarten C. and Ridderinkhof, Herman (2008) Long-term evolution of sand waves in the Marsdiep inlet. I: High-resolution observations. Continental Shelf Research, 28 (9), 1190-1201. (doi:10.1016/j.csr.2007.10.011).

Record type: Article

Abstract

A seven-year long data set from 1998 to 2005 of sand waves in the Marsdiep tidal inlet in the Netherlands is presented. The sand waves are visible on digital terrain models (DTMs) that were compiled from water depths obtained with a ferry-mounted acoustic Doppler current profiler. This multi-year data set allows to study the spatial and temporal evolution of sand-wave migration, height, length, asymmetry, and orientation. Horizontal migration rates were successfully obtained with a simple cross-correlation technique similar to techniques used in particle tracking. The study area can be divided in roughly two halves. In the southern half of the inlet, the sand waves are of the progressive type with area-mean heights of about 3 m and lengths of about 190 m. In the northern half, the sand waves are asymmetrical-trochoidal with area-mean heights of about 2 m and lengths of about 165 m. Across the inlet, the sand waves migrate in the flood direction with rates between 0 and . Only the progressive waves in the southern half migrate in directions perpendicular to their crests. A striking observation is the seasonal variability in height and migration of the sand waves in the northern half of the inlet. The sand-wave heights are about 0.5 m higher in fall than in spring and the migration rates are about higher in winter than in summer. This paper only presents observations and analysis techniques. In a subsequent paper, the ADCP-current data will be applied to explain the spatial and seasonal variability of the sand waves.

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Published date: 30 May 2008
Organisations: Ocean and Earth Science

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Local EPrints ID: 340321
URI: https://eprints.soton.ac.uk/id/eprint/340321
ISSN: 0278-4343
PURE UUID: 80f80ad6-387a-4000-a0dd-df9967db0cf4

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Date deposited: 18 Jun 2012 15:23
Last modified: 28 Aug 2019 18:56

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