Using a sand wave model for optimal monitoring of navigation depth

Michiel Knaapen, Suzanne J.M.H. Hulscher, Meinard C.H. Tiessen, J. van den Berg

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

In the Euro Channel to Rotterdam Harbor, sand waves reduce the navigable depth to an unacceptable level. To avoid the risk of grounding, the navigation depth is monitored and sand waves that reduce the navigation depth unacceptably are dredged. After the dredging, the sand waves slowly regain their original height. To reduce the high costs of surveying and dredging, the North Sea Service of the Department of Transport, PublicWorks andWater Management, is implementing a Decision Support System to reduce the required amount of surveys and provide optimal information on the necessity to dredge. Currently, the system predicts the growth of sand waves using a linear trend. The trend is determined from observations using a Kalman-filter including geo-statistical components to incorporate spatial dependencies. This works well for sand waves that are close to their maximum height. After dredging however, the sand wave height is far from its equilibrium and the growth rate is much higher, making the linear prediction worthless. Here we show that replacing the linear trend with a landau equation improves the predictions of the regeneration. Comparison shows that the landau equation predicts the crest evolution better than the linear equation for both undisturbed sand waves and dredged sand waves, with an root mean square error that is 25% less.
Original languageUndefined
Title of host publicationRiver Coastal and Estuarine Morphodynamics: RCEM 2005, Vol II, 4-7 October 2005, Urbana, Illinois, USA
EditorsG. Parker, M.H. García
Place of PublicationLondon
PublisherBalkema / Taylor&Francis
Pages999-1007
ISBN (Print)0-415-39270-5
Publication statusPublished - 4 Oct 2005
EventRiver Coastal and Estuarine Morphodynamics, RCEM: River Coastal and Estuarine Morphodynamics: RCEM 2005, Vol II, 4-7 October 2005, Urbana, Illinois, USA - Urbana, Illinois, USA, London
Duration: 4 Oct 20057 Oct 2005

Publication series

Name
PublisherBalkema / Taylor&Francis

Conference

ConferenceRiver Coastal and Estuarine Morphodynamics, RCEM
CityLondon
Period4/10/057/10/05
Other4-7 October 2005

Keywords

  • METIS-224570
  • IR-52815

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