Allows the Time of Concentration to be calculated for the Runoff Generation.

Different methods can be selected to calculate the amount of time. More information is available on each of the methods supported by the software by clicking the links below.

Then, appropriate values are entered and the calculation is performed when "Calculate TC" is clicked.

Some initial values on the calculator are populated based on the current Inflow:

    • Area - Based on the current inflow's Area
    • Catchment Slope - Maximum slope derived from the Outline if a surface file is available. If no surface file is used, defaults to 1:200.
    • Catchment Length - The maximum distance between any two points on the outline of the area.
    • Runoff Coefficient - The Preliminary or Runoff Coefficient, depending on where the calculator is launched from. Defaults to 0 if it is not specified.

All of these values can be overwritten in the Calculator without affecting the values on the Inflow.