Print Email Facebook Twitter Damage to Grass Covered Slopes Due to Overtopping Title Damage to Grass Covered Slopes Due to Overtopping Author Hai, T.L. Verhagen, H.J. Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2014-06-15 Abstract Many dike failures have been ignited by damage due to erosion on the landward slopes. This paper investigates how grass covered slopes perform when being attacked by overtopping flow during storm surges. Based on observations during a number of simulator tests, damage is classified into three types 'head-cut', 'roll-up' and 'collapse' depending on the combination of grass, material components and corresponding layer thickness. To quantitatively predict the potential types, strength ratio and thickness ratio are proposed. Besides, erosion usually starts at weak spots so their spatial distributions are evaluated along dike stretches with various lengths. Finally, the overtopping resistance of a grass turf is presumably represented by critical velocities depending on soil cohesion and apparent cohesion induced by roots. The computed results are comparable to erosion on Bermuda and Carpet grass slopes tested with the simulator. Subject slopegrassovertoppingrevetmentdamageICCE 2014 To reference this document use: http://resolver.tudelft.nl/uuid:56fec991-2026-49e7-b0cb-1faeea36d55a Publisher Coastal Engineering Research Council ISBN 978-0-9896611-2-6 Source ICCE 2014: Proceedings of 34th International Conference on Coastal Engineering, Seoul, Korea, 15-20 June 2014 Part of collection Institutional Repository Document type conference paper Rights (c) 2014 The Author(s) Files PDF 7199-30991-1-PB.pdf 1.21 MB Close viewer /islandora/object/uuid:56fec991-2026-49e7-b0cb-1faeea36d55a/datastream/OBJ/view