Data

Velocity boundary
Flux boundary
Level boundary
Discharge boundary
Flather boundary

Velocity boundary

If a velocity boundary is selected the velocities in the x- and y-direction can be specified in three different ways

·         Constant (in time and along boundary)

·         Variable in time and constant along boundary

·         Variable in time and along boundary

For the case with velocities varying in time but constant along the boundary you have to prepare a data file containing the velocity components in the x- and y-direction before you set up the hydrodynamic simulation. The data file must be a time series file (dfs0). The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different types of interpolation.

For the case with velocities varying both in time and along the boundary you have to prepare a data file containing the boundary values before you set up the hydrodynamic simulation. In case of a 2D simulation the file must be a profile file (dfs1). In case of a 3D simulation the file must be a dfs2 file or a 2D dfsu file containing information from a vertical plane. The mapping from the input data file to the boundary section is described in Interpolation type. The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different types of interpo­lation.

Flux boundary

If a flux boundary is selected the fluxes (the depth-integrated velocities) in the x- and y-direction can be specified in three different ways

·         Constant (in time and along boundary)

·         Variable in time and constant along boundary

·         Variable in time and along boundary

For the case with fluxes varying in time but constant along the boundary you have to prepare a data file containing the flux components in the x- and y-direction before you set up the hydrodynamic simulation. The data file must be a time series file (dfs0). The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different type of interpolation.

For the case with fluxes varying both in time and along the boundary you have to prepare a data file containing the boundary values before you set up the hydrodynamic simulation. The file must be a profile file (dfs1). The map­ping from the input data file to the boundary section is described in Interpola­tion type. The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different type of interpolation.

Level boundary

If a level boundary is selected, the format of the water level (surface eleva­tion, in m) can be specified as:

·         Constant (in time and along boundary)

·         Variable in time and constant along boundary

·         Variable in time and along boundary

·         Rating curve

For the case with water level varying in time but constant along the boundary you have to prepare a data file containing the water level before you set up the hydrodynamic simulation. The data file must be a time series file (dfs0). The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different type of interpo­lation.

For the case with water level varying both in time and along the boundary you have to prepare a data file containing the boundary values before you set up the hydrodynamic simulation. The file must be a profile file (dfs1). The map­ping from the input data file to the boundary section is described in Interpola­tion type. The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different type of interpolation.

For the case with water levels defined by a Rating curve you have to define a data file containing the relation between discharge and water level. The file must be a time series file (dfs0) describing the water level by the relative item axis and the discharge by an item.

Discharge boundary

If a discharge boundary is selected, the format of the total discharge can be specified as:

·         Constant (in time)

·         Variable in time

·         Rating curve

For the case with discharge varying in time you have to prepare a data file containing the total discharge before you set up the hydrodynamic simulation. The data file must be a time series file (dfs0). The data must cover the com­plete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. You can choose between different types of time interpolation.

For the case with discharge defined by a Rating curve you have to define a data file containing the relation between discharge and water level. The file must be a time series file (dfs0) describing the water level by the relative item axis and the discharge by an item.

Flather boundary

If "Flather condition" is selected, the velocities in the x-and y-direction and the water level (surface elevation) must be specified. For specification of these parameters see Velocity boundary and Level boundary. If discharge con­straint is included the total discharge must also be specified. For specification of the total discharge see Discharge boundary.