Determining the critical velocity of grass sods for wave overtopping by a grass pulling device

Roel Bijlard, Gosse Jan Steendam, Henk Jan Verhagen, Jentsje Van Der Meer

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

1 Citation (Scopus)

Abstract

The strength of the grass sod is an important factor for the stability of a dike in the Netherlands during wave overtopping conditions. Many tests have been performed the last few years with the Wave Overtopping Simulator, leading to the Cumulative Overload Method and a critical velocity. This velocity is a strength parameter of grass on a dike under loads induced by overtopping wave volumes. A new method has been developed to determine this critical velocity, by measuring the force while lifting the grass sod perpendicular to the slope out of the sod. This force is rewritten into the critical grass normal stress which is one of the input parameters for determining the critical velocity of a grass sod. When the critical velocity resulting from this method is compared with the determined critical velocities with the Wave Overtopping Simulator, there is good correspondence between the results for the tested locations. Therefore the sod pulling test could provide results that are reliable enough to determine the critical velocity of a dike section.

Original languageEnglish
Title of host publicationProceedings of the 35th International Conference on Coastal Engineering, ICCE 2016
EditorsP. Lynett
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1158-1171
Volume35
ISBN (Electronic)9780989661133
ISBN (Print)978-1-5108-4408-7
Publication statusPublished - 2016
Event35th International Conference on Coastal Engineering - Antalya, Turkey
Duration: 17 Nov 201620 Nov 2016
Conference number: 35
http://www.icce2016.com/en/

Publication series

NameProceedings of the Coastal Engineering Conference
PublisherAmerican Society of Civil Engineers
Volume35
ISSN (Electronic)0161-3782

Conference

Conference35th International Conference on Coastal Engineering
Abbreviated title ICCE 2016
CountryTurkey
CityAntalya
Period17/11/1620/11/16
Internet address

Keywords

  • Critical Velocity
  • Cumulative Overload Method
  • Grass Cover
  • Sod Pulling Device
  • Wave Overtopping

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  • Cite this

    Bijlard, R., Steendam, G. J., Verhagen, H. J., & Van Der Meer, J. (2016). Determining the critical velocity of grass sods for wave overtopping by a grass pulling device. In P. Lynett (Ed.), Proceedings of the 35th International Conference on Coastal Engineering, ICCE 2016 (Vol. 35, pp. 1158-1171). (Proceedings of the Coastal Engineering Conference; Vol. 35). American Society of Civil Engineers (ASCE).