Laboratory investigation of scour development through a spring-neap tidal cycle

Porter, K. and Simons, R. and Harris, J. (2014) Laboratory investigation of scour development through a spring-neap tidal cycle. In: ICSE 2014 (7th International Conference on Scour and Erosion), 2 – 4 December 2015, Perth, Western Australia.

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Understanding the process of seabed erosion around structures in the marine environment is in-tegral to designing safe and cost effective foundations. However, few studies have considered the effect of tidal flow on scour development. This paper reports on a flume investigation of scour through a spring-neap tidal cycle around a monopile foundation. Comparison was made with tests under reversing flow and unidi-rectional current both with a velocity of constant amplitude. A scale marked onto the pile and a photogram-metry technique enabled analysis of the scour hole development during the tests. In the reversing flow case where the velocity was of constant amplitude, there was little change to the maximum scour depth after only a few flow reversals, and the depth reached was considerably less than in the unidirectional case. In the spring-neap test it was clear that equilibrium depth had not been achieved after one spring-neap cycle. This indicates that the spring-neap cycle has a significant impact on the time-scale of scour development.

Item Type: Conference or Workshop Item (Paper)
Subjects: Coasts > Sediment transport and scour
Coasts > General
Depositing User: Unnamed user with email
Date Deposited: 02 Apr 2020 09:50
Last Modified: 20 May 2020 10:24

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