Numerical modelling of infragravity waves in coastal regions
D.P. Rijnsdorp
G.S. Stelling – Mentor
L.H. Holthuijsen – Mentor
M. Christou – Mentor
J.D. Pietrzak – Mentor
M. Zijlema – Mentor
M.A. de Schipper – Mentor
A.J.H.M. Reniers – Mentor
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Abstract
Infragravity waves are a common feature in the nearshore wave field and have a significant impact on numerous coastal processes. It is therefore important to accurately predict infragravity wave conditions at a given location. However, analytical relations do not exist with which to make such predictions and one has to rely on numerical models. In this study infragravity waves are simulated with a linear 1D surf beat model (IDSB) and a non-hydrostatic model (SWASH). The aim of this study is to perform a detailed numerical investigation into the nearshore behaviour of infragravity waves. Specific attention is paid to the generation, propagation and reflection of IG-waves.