Channel Parameters (Input Values)

in
ft ⁄ft
cfs

X Y n
1
2
3
4
na

Output

Channel Discharge    Q=1.49⁄n Aw  Rh2⁄3 So½
= 1.49⁄ ()() 2⁄3()½
= cfs

Channel Flow Velocity    V = Q⁄Aw = ⁄
= ft/s

Freeboard    Fb = 1⁄6(d + V2⁄(2(g)))
= 1⁄6( + 2⁄(2())) =

Top Width    TW = LB + RB + W
= + + = ft

Manning Equation Variables

Wetted Area of Flow    
Aw=(d)(LB)(½) + (d)(RB)(½) + (W)(d)
= ()()(½) + ()()(½) + ()()
= ft2

Wetted Perimeter    Pw= RBP + LBP + W
= ft + ft + ft
= ft

Hydraulic Radius     Rh=Aw⁄ Pw= ft 2 ⁄ ft
= ft

Channel Geometry Variables

Left Bank Width    LB = (d)(Left Bank Slope)
= ()() = ft

Right Bank Width    RB = (d)(Right Bank Slope)
= ()() = ft

Right bank perimeter length
RBP = √( RB2 + d2 ) = √(2+ 2) = ft

Left bank perimeter length
LBP = √( LB2 + d2 ) = √(2+ 2) = ft