Required median rock size, D50 ?
Required median rock size, D50 ?
mm
m
in
ft
X
Equation applied
Equation applied
X
Specific gravity check
Specific gravity check
X
Gradation SD check
Gradation SD check
X
Rock layer thickness (2 × D50 )
Rock layer thickness (2 × D50 )
mm
m
in
ft
X
Top crest curve radius (40 × D50 )
Top crest curve radius (40 × D50 )
mm
m
in
ft
X
Top crest curve arc length
Top crest curve arc length
m
mm
ft
in
X
Outlet apron length (15 × D50 ) ?
Outlet apron length (15 × D50 ) ?
m
mm
ft
in
X
Manning roughness in chute, n
Manning roughness in chute, n
X
Velocity through rock mantle, Vm ?
Velocity through rock mantle, Vm ?
m/s
ft/sec
X
Unit flow through mantle, qm
Unit flow through mantle, qm
m^2/s
cfs/ft
X
Surface unit flow, qs (qt − qm )
Surface unit flow, qs (qt − qm )
m^2/s
cfs/ft
X
Flow depth above riprap surface, d
Flow depth above riprap surface, d
m
mm
ft
in
X
Inlet weir head, Hp ?
Inlet weir head, Hp ?
m
mm
ft
in
X
Inlet ponding check
Inlet ponding check
X