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Wissenschaftliche Untersuchung der Stabilität eines Deckwerks zur Ufersicherung der Küste von Benin - Hafen von Cotonou

Supervisor:Dr.-Ing. Nils Goseberg
Researcher:M.Sc. Jochen Michalzik
Duration:01.09.2017 - 01.11.2018
Funded by:Inros Lackner SE
Bild Wissenschaftliche Untersuchung der Stabilität eines Deckwerks zur Ufersicherung der Küste von Benin - Hafen von Cotonou

The Ludwig-Franzius-Institute was commissioned to investigate the groin stability using physical model tests. These tests were conducted in the hydraulic laboratory of the Ludwig-Franzius-Institute in Hannover. The results were analysed with the approaches of Van der Meer (1988) and Hudson (1959). Therefore, the critical damage number defined by Van der Meer (1988) was calculated to Nod 2.15 and given by Hudson (1959) with D = 5% for the groin head. For the design wave height and period, the determined damage numbers were in the range of no-damage for both approaches (Nod = 1.6 resp. D = 3.6%). Consequently, the stability check was fulfilled for the selected design wave parameter. According to Hudson (1959), an increase of the selected design wave height up to 4.72 m led to initial damage by reaching the critical damage of D = 5% in test 7 (mean D = 4.75%). Therefore, the groin is evaluated as suitably designed for the application at the coast of Benin based on the provided information. The presented conclusion is based on the data provided by the client, with an extreme wave height at the groin roundhead according to a return period of 100 years and Hm0 = 3.93 m and Tp = 18.40 s.

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