Resistance values interpolation
The tool 'Resistance values interpolation' may be used to perform a linear interpolation of resistance values, and assign them to cross sections.
Note that the tool doesn't change the resistance distribution type for the cross sections, i.e. it may for example change the 'Uniform' value for a cross section which uses the type 'High / low flow zones' but in this case the cross section won't use the modified value in the simulation until its distribution type is changed.
It is possible to select between two different types of values to be interpolated:
· 'Uniform': this is used to change the 'Uniform' resistance value of the cross sections
· 'High/low flow zones': this is used to change the 'Left high flow', 'Low flow' and 'Right high flow' values of the cross sections.
The input resistance values to be interpolated are entered in the table. Each row contains a location (branch and chainage) and resistance value(s). The locations specified in this table don't have to match the cross sections locations. When the cross sections are updated, values from this table are interpolated linearly as a function of the chainage, and are then assigned to cross sections found within the range of chainages defined between the smallest and the highest chainage specified for each branch. When a cross section's chainage is out of the specified ranges, it is not processed.
Two buttons are available above the table:
· 'Import all sections': adds one row for each cross section's location existing in the model definition. Only the cross sections from the active Topo ID (Topo ID selected in the 'Branches' menu) are imported.
· 'Import selected sections': adds only the cross sections being selected.
The selected changes can either be applied to all cross sections, or only to the selected ones. Regardless of the selected option, only the cross sections lying within the range of chainages specified in the table are updated.
If the option 'Only update cross sections from branches and Topo ID included in simulation' is checked, all cross sections defined on non-existing branches, or on a different Topo ID than the one used for the branch in the simulation, are ignored.
· Update: Applies the selected changes to the cross sections.
· Save log: Saves the messages issued during the update to a text file.
· Clear log: Clears the log-messages in the text box above the buttons.
· Close: Closes the tool.