Runoff Calculation Methods
Three methods of obtaining runoff in the gutter are included. The first method is to simply ask user for the runoff of the gutter at each inlet location before the inlet is designed. This method assumes that user calculated runoff outside the program. This method cannot be used simultaneously with the first item of the Inlet Location Method. If the user specifies this combination, the program will issue an error message and permit the user to change the option. The second method is to calculate the runoff by known rainfall intensity and time of concentration. The rainfall intensity and time of concentration can be constant or varied from inlet to inlet. This data willed be prompt by the following entry form. The third method is to use a kinematic wave equation to calculate critical time of concentration and rainfall intensity and use this data to calculate the runoff.