Data selection

If constant values of the sediment properties over the model area were selected, you have to specify only one value for d₅₀ and s_g. If you choose to specify spatially varying sediment properties, a data file containing two items (d₅₀ and s_g) must be specified. You may do this by typing the path and name of the data file (a dt2 file in the old format and a dfs2 file in the new format) or by clicking the mouse on the button to the right of the Data File entry. The grid spacing and extent of the sediment data file must be the same as in the HD data file.

You can specify uniform bed material by defining s_g = 1. You can identify areas where sediment transport will not take place, or where it should not be calculated (e.g. areas where the sea bottom is covered by rocks, revetments, etc.), by setting the value of the grain size in the sediment map to -99.