Inputs
mm
Sub-areas
Method & CN typical values
- S = (25400/CN) − 254 (mm); Ia = 0.2·S.
- Q = (P − Ia)² / (P − Ia + S) if P > Ia, else Q = 0.
- Composite CNw = Σ(CN·A) / ΣA.
- AMC III: CNIII = 23·CNII/(10 + 0.13·CNII).
- AMC I: CNI = 4.2·CNII/(10 − 0.058·CNII).
Results
Total Area—
Composite CNII—
CN (adjusted for AMC)—
Potential retention S—
Initial Abstraction Ia—
Runoff Depth Q—
Runoff Volume V—