You can start your simulation either from scratch (a “cold start”) or on the basis of a previous simulation (a “hot start”). In the latter case you need to save information about the simulation you wish to continue. These data are called “hot data”.
The hot data consist of the following model information:
· Model dimensions and grid spacings, time step and time at end of simulation, information on flooding and drying, the latitude of the model and its orientation (relative to true north), and the value above which a point is always considered to be land
· Bathymetry
· Initial surface elevation (i.e. the surface elevation at the last time step in the previous simulation)
· Fluxes in the x-direction at the last time step
· Fluxes in the y-direction at the last time step
· Fluxes in the x-direction a full time step before the last one
· Fluxes in the y-direction a full time step before the last one
· Water depth in dried out points (if you had chosen the flooding and drying facility).
Thus, if you use a hot start, you need not (and cannot) specify the data listed above.