Author(s)

M Houari, P. Sergent, D, Duhamel

Abstract

Water waves in harbour areas: appreciation of open boundary conditions M. Houari*, P. Sergent", D. Duhamel* * Laboratory of Materials Analysis and Identification, LAMI, Marne-la- Vallee, France * Centre dEtudes Techniques Maritimes Et Fluviales, Compiegne, France Abstract Open boundary conditions significantly influence the results of a water wave numerical model based on the mild slope equation. An integral equation is written on an arc of circle for a harbour area limited by two semi-infinite fully reflective straight dikes of any direction. This formulation, providing useful idealized tests for practical use, is compared, in an analytical test case and for a schematic harbour, with simplified and full parabolic approximations. Parabolic approximations provide excellent results if the reflected wavefield generated from the exterior dikes is perfectly known. 1 Introduction Water waves in harbour areas are usually computed with the elliptic mild slope wave equation. Rad

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