I have setup XBeach NH model with a high resolution variable model
grid varying from 0.5m to 1.2m. The duration of model simulation is 20
minutes and the simulations completes without any error. However
analysis of simulated the result show there is drop in water level as
the simulation progresses.
Model was setup with constant water level and
the offshore boundary was imposed by JONSWAP spectrum
random wave time-series.
I am attaching the model files and grid for review.
I appreciate suggestions and possible solutions from the forum
members who may have noticed this problem in the XBeach NH simulations.
Thank you in Advanced
Thank you everyone.
The drop in water level was cause by boundary condition which was
defines as abs2d. The boundary has to be defined as nonh_1d for
non-hydrostatic simulations. Changing boundary resolved the issue.