MIKE 21 BW, User Manual, Page: 132 / 196

Reference Manual
132 MIKE 21 BW - © DHI
Figure 5.20 Boussinesq wave simulation using unidirectional wave generation input
(dfs1), see the MIKE 21 Toolbox tool Random Wave Generation
Incident directional irregular waves
For incident directional irregular waves, i.e. waves having an angle different
from 90 degrees relative to the generation line, only internal wave generation
is possible. In this case a .dfs1 line series data file is used as input. An exam-
ple is shown in Figure 5.21.
Figure 5.21 Boussinesq wave simulation using directional wave generation input
(dfs1), see the MIKE 21 Toolbox tool Random Wave Generation
5.3.5 Bottom friction
Short periodic waves
Usually the effects of bottom friction are relatively unimportant in simulation of
short waves in ports and harbours. This is because the area covered by most
short wave models is relatively small (typically less than a few square km's),
and with the exception of high waves and/or very shallow water there is usu-
ally not a sufficient distance for the bed resistance to attain any significant
effect on short wave propagation. In these applications the bed resistance
can usually be excluded, without the need for detailed evaluations.