Observed destruction of a beach cusp system in presence of a double- coupled cusp system: the example of Grand Popo, Benin

ABSTRACT Senechal, N., Laibi, R.A., Almar, R., Castelle, B., Biausque, M., Lefebvre, E. J. Anthony, J.-P., Dorel, M., Chuchla, R., Hounkonnou, M.H., Du Penhoat, Y., 2014. Observed destruction of a beach cusp system in presence of a double-coupled cusp system: the example of Grand Popo, Benin. In: Green, A.N. and Cooper, J.A.G. (eds.), Proceedings 13th International Coastal Symposium (Durban, South Africa), Journal of Coastal Research, Special Issue No. 70, pp. 669–674, ISSN 0749-0208. Beach cusps are common features of steep reflective and intermediate beaches. However, very few observations have reported double coupled cusp systems. Here, we present a dataset of observations of a beach exhibiting two sets of beach cusps. Data were collected at Grand Popo Beach (Benin, West Africa) in February 2013. Daily topographic surveys along a 380 m long stretch of shore allowed observation of the dynamics of the two sets of beach cusps. At the beginning of the field survey, we clearly observe two sets of cusps; the...