The Tabulated Structure property page is used for defining a structure regulated by a user defined relationship between the discharge through the structure and the up- and downstream water level (Q/dh).
Location
ID. String identification of the structure. ID will be used in structure results and hence makes it easier to identify a specific structure if setup contains many structures, or if multiple structures are defined at the same location.
Branch name. The Branch name is automatically registered where the structure is located.
Chainage. Chainage at which the structure is located.
Type. The location type may be defined as Regular, Side Structure or Side Structure with Reservoir. See Structure types definition (p. 114) for details.
Calculation mode
Q as a function of h (upstream) and h (downstream): The discharge is given as a function of the up- and downstream water level. The upstream water level ‘h(upstream)’ must be tabulated in the first column and the downstream water level ‘h(downstream)’ must be tabulated in the first row in the table. Then the corresponding discharges must be tabulated.
The upstream water level must increase in the downward direction and the downstream water level must increase in the right direction. The discharge cannot increase in the right direction and it cannot decrease in the downward direction.
h (upstream) as a function of h (downstream) and Q: The upstream water level is given as a function of the discharge and downstream water level. The downstream water level ‘h(downstream)’ must be tabulated in first column and the discharge must be tabulated in the first row in the table. Then the corresponding upstream water levels must be tabulated.
The discharge must increase in the right direction and the downstream water level must increase in the downward direction. The upstream water level must increase in the right and the downward direction.
h (downstream) as a function of h (upstream) and Q: The downstream water level is given as a function of the discharge and upstream water level. The upstream water level ‘h(upstream)’ must be tabulated in the first column and the discharge must be tabulated in the first row in the table. Then the corresponding downstream water levels must be tabulated.
The discharge must increase in right direction and the upstream water level must increase in the downward direction. The downstream water level must decrease in the right direction and increase in the downward direction.
Tabulated data
No. of rows: Set number of rows in the table. The number of rows must be 4 or higher. A large number of rows will increase the accuracy and the stability of the results.
No. of columns: Set number of columns in the table. The number of columns must be 4 or higher. A large number of columns will increase the accuracy and the stability of the results.
Discharge factor: The discharge factor is multiplied to the discharge in the table.
Water level datum: The water level datum is added to the up- and downstream water level in the table.