Results

Two main types of output data can be obtained from a hydrodynamic simula­tion:

1.       'Output file', a type 0 (point series), 1 (line series) or 2 (area series) data file, which contains results from the hydrodynamic simulation. Because the amount of model output tends to be very large - huge - it is often not feasible to save all output items in all computational areas and in all grid points at all time steps. In order to reduce the file size it is possible to specify the output file using sub-areas and sub-sets for selected items.

See also Specification of output files

2.       'Hot start file', a type 2 data file, which can be used to re-start computa­tions. You have to specify the name of the hot-output file. You can specify a title too, if you want.

In addition Inundation statistics can be calculated and stored as a dfs2 file. The update frequency is given in the form of a time interval. The update fre­quency only has an effect on how often the results are written to the file. If the simulation runs to completion then the update frequency may be chosen large so that disc access is reduced. To only update the inundation statistics at the end of the simulation set the update frequency (f_update) to the total dura­tion of the simulation, i.e.

(5.1)   

where N is the total number of time steps and Dt is the time step interval.

It is possible to add the duration in which the water depth is above a user-specified threshold during the simulation to the inundation statistics output.

Note: If the dfs2 file contains ‘level and flux’ output only and has a Data type = 1 (set automatically during output if only H, P and Q are selected), then it is possible to use derived items from the file in other MIKE Zero components such as Plot Composer, Result Viewer and the MIKE Zero Toolbox statistics.