Roof Area Inflows can be applied to the system using the Roof Inflow type.

Area

An area can be entered directly or calculated automatically from the polygon drawn on the Plan.  

Proportion Drained

Used to factor the amount of the area that is actually roof and therefore enters the system.  

Area Drained

An actual area to be drained based on the Proportion drained can be entered directly or calculated automatically from the polygon drawn on the Plan.
 
Area Drained = Area * Percentage Drained.  

Runoff Method

The preferred runoff methods can be selected - select from the methods below for details and required input parameters.

Green Roof
Time of Concentration
Time Area Diagram

Click the links below for details on the other tabs.

Pollution

Land Use

Rainwater Tank