Description of the KNMI operational wave forecast model GONO

P.A.E.M. Janssen G.J. Komen H.H. Peeck M.J.M. Saraber The purpose of this report is to give a description of the GONO computer code, which is operational at KNMI for many years now. The program was developed by J.W. Sanders, and its deep water version is based on a Norwegian wave prediction model, built by C. Haug in the sixties. Shallow water effects are however important in the southern part of the North Sea, giving a limitation of the wave growth and causing important swell dissipation. A discussion of the shallow- water effects, as present in GONO, is given by Sanders. The computer code GONO is written in ALGOl-60 and operational on the Burroughs 6700 of KNMI.