Initial volume losses at nourished beaches and the effect of surfzone slope.

Matthieu De Schipper, Sierd De Vries, Joao Mil-Homens, Ad Reniers, Ranasinghe W M R J B Ranasinghe, Marcel Stive

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

Abstract

Nourishment projects often experience a period of large initial losses just after completion of the project. A better understanding of these losses would improve the design of nourishment strategies. Here we propose that the large initial losses could partly originate from the change in the cross-shore slope. A steepening of the slope results in an increase in background erosion, as is deduced from common bulk sediment transport formulae. Morphological data from a nourishment at Vlugtenburg Beach, the Netherlands provide support for this hypothesis. At Vlugtenburg we observe a large difference in the erosion rates between the first years. Our measurements also show that the slope adjusts on similar timescales as the timescales of initial losses, i.e. 1 to 2 years. We conclude that the steepness of the man-made profile is an important parameter, which may be manipulated to influence the lifetime of the nourishment.
Original languageEnglish
Title of host publicationCoastal Sediments 2015
Subtitle of host publicationThe Proceedings of the Coastal Sediments 2015
EditorsPing Wang, Julie D. Rosati, Jun Cheng
PublisherWorld Scientific
ISBN (Electronic)978-981-4689-98-4 , 978-981-4689-97-7
DOIs
Publication statusPublished - 15 Apr 2015
Externally publishedYes
EventCoastal Sediments 2015 - Washington D.C., San Diego, United States
Duration: 11 May 201516 May 2015

Conference

ConferenceCoastal Sediments 2015
CountryUnited States
CitySan Diego
Period11/05/1516/05/15
Other11-05-2015 - 16-05-2015

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