The SCS curve number method uses the following parameters:
STRTL - Initial rainfall abstraction in inches (mm) for snowfree ground. If value is 0, then initial abstraction will be computed as 0.2*(1000-10*CRVNBR)/CRVNBR.
CRVNBR - SCS curve number for rainfall/ losses
on snowfree ground.
NOTE: Composite Curve Numbers can be computed automatically
when this method for computing losses is chosen and a terrain model is
present.
RTIMP - Percentage of drainage basin that is impervious.
Related Topics:
Editing HEC-1 Parameters
Defining a Loss Method
Computing Composite CN