Rock slopes with open filters under wave loading: Effects of storm duration and water level variations

Marcel R.A. Van Gent, Guido Wolters, Ivo M. Van Der Werf

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Rubble mound breakwaters and revetments typically contain granular filters in one or more layers. The transition from the armour layer to the filter layer, and transitions between other layers within the structure, are normally geometrically tight to prevent material washout. This requires a limited ratio of the material size of the upper layer and neighbouring layer. An alternative is a geometrically open filter where in principle underlayer material can be transported into the upper layer, but if the hydraulic load at this transition between two layers remains low, the transition can be designed such that no or limited transport occurs, see for instance Van Gent and Wolters (2015), Van Gent et al (2015) and Jacobsen et al, (2017). This allows for larger ratios of material sizes, which can reduce the number of filter layers, and relax the material requirements with respect to the width of gradings. This can lead to considerable cost savings. In Van Gent and Wolters (2015) physical model tests for the transition between a layer of rock and an underlayer that consists of sand have been performed and design guidelines have been derived. Here, additional physical model tests are presented to study the influence of the storm duration and water level variations on the response of sand underneath a layer of rock.

Original languageEnglish
Title of host publicationProceedings of the 35th International Conference on Coastal Engineering, ICCE 2016
EditorsPatrick Lynett
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages9
ISBN (Electronic)9780989661133
Publication statusPublished - 2016
Externally publishedYes
Event35th International Conference on Coastal Engineering, ICCE 2016 - Antalya, Turkey
Duration: 17 Nov 201620 Nov 2016

Publication series

NameProceedings of the Coastal Engineering Conference
Volume35
ISSN (Print)0161-3782

Conference

Conference35th International Conference on Coastal Engineering, ICCE 2016
Country/TerritoryTurkey
CityAntalya
Period17/11/1620/11/16

Keywords

  • Erosion
  • Open filters
  • Physical model tests
  • Rock slopes
  • Storm duration
  • Water level variations

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