InfoDrainage 2021.2 Help Documentation infodrainage2021v2

Inflows are sources of flows for the Site. Click the individual Inflow links to the right to see specific input details.


Details of the specific Inflow are entered.



The name of the pollutant, as listed on the Pollutants form


Enter the concentration of the pollutant as it washes off the Area or Hydrograph. This is a constant rate of concentration.


Applies only to Catchment Area and Green Roof

Runoff Reduction ( Water Quality Calculator Method (NYS Design Manual)

Methode de Caquot (Network Design)

Used in the Network Design calculations when the Caquot method is selected.

Runoff Path Length

Calculated as the longest diagonal path across the area outline (if available). User can overrule the value if required.

Catchment Slope

Calculated from the difference in level for longest diagonal path across area outline (if available and there is a surface) or defaults to 0.005%. User can overrule the value if required.

Rainwater Tank

The option to include a rainwater tank which takes flow at the source. Follow the link above for specification details.

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