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Overflow tests on grass-covered embankments at the living lab Hedwige-Prosperpolder: an overview
Koelewijn, A.; Rikkert, S.J.H.; Peeters, P.; Depreiter, D.; van Damme, M.; Zomer, W. (2022). Overflow tests on grass-covered embankments at the living lab Hedwige-Prosperpolder: an overview. Water 14(18): 2859. https://dx.doi.org/10.3390/w14182859
In: Water. MDPI AG: Basel. ISSN 2073-4441, more
Peer reviewed article  

Available in  Authors 

Keywords
    Erosion
    Grass
    Hydraulic structures > Dikes, shores and other flood defenses > Erosion protection
    Hydraulic structures > Dikes, shores and other flood defenses > Failure mechanisms
    In situ tests > Field tests
    In-situ measurements
    Overtopping

Project Top | Authors 
  • Interregproject POLDER2C's, more

Authors  Top 
  • Koelewijn, A.
  • Rikkert, S.J.H.
  • Peeters, P., more
  • Depreiter, D., more
  • van Damme, M.
  • Zomer, W.

Abstract
    In regions with a temperate climate, a well-maintained grass sod on a clay layer is considered a reliable protection for dams and dikes. In the Living Lab Hedwige-Prosperpolder, on the left bank of the Scheldt river straddling the border between Belgium and the Netherlands, a series of 27 overflow tests with a purpose-built overflow generator has been executed to determine the strength of the protective layer against erosion at various conditions. The goal of this paper is to inform on the executed test program and the initial results. From the results, it was concluded that in general, a high-quality grass cover on the landside dike slope can withstand high overflow discharges well for 12 to 30 h, without severe erosion damage. Anomalies, such as the presence of animal burrows, reed vegetation, and already present deformations can strongly reduce the resistance of the cover layer and may lead to failure within a couple of hours.

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