Lining Design Application
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Channel Lining
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Program Calculations
New Channel Lining Project
Grass, TRM and Riprap
Project & Channel
Project Data
Project Number
Channel Location
Right
Center
Left
Lower Station Limit (#+##)
Upper Station Limit (#+##)
Channel Dimensions
Channel geometery
Trapezoidal
Rectangular
Triangular
Parabolic
Fore slope (horizontal ft per vertical foot)
ft/ft
Back slope (horizontal ft per vertical foot)
ft/ft
Channel bottom width
ft
Longitudinal slope
ft/ft
Initial water depth (enter 1 if unknown)
ft
Discharge (Q)
ft
3
/s
Grass & TRM
Soil Inputs And Shear Stress
Soil Classification (USCS)
GW (Well graded gravel)
GP (Poorly graded gravel)
GM (Silty gravel)
GC (Clayey gravel)
SW (Well graded sand)
SP (Poorly graded sand)
SM (Silty sand)
SC (Clayey sand)
ML (Low plasticity silt)
CL (Low plasticity clay)
MH (High plasticity silt)
CH (High plasticity clay)
Plasticity Index (PI)
Soil D
75
in
Permissible soil shear stress
(lb/ft
2
)
Grass And Roughness Characteristics
Grass type
Sod
Bunch
Mixed
Density of grass cover
Excellent >= 95%
Good 75-95%
Poor < 75%
Stem height (ft)
0.25
0.50
0.75
1.00
Grass Roughness Coefficient
Calculate Channel Parameters & Lining Acceptability
Calculated Grass & TRM Parameters
Area of flow (A)
ft
2
Wetted perimeter (P)
ft
Hydraulic Radius (R)
Average Velocity
ft/s
Manning Roughness (n)
ft
2
Maximum shear stress on channel bottom
lb/ft
2
Compare to permissible shear stress
Final Depth
ft
Top width
ft
Final Discharge (Q)
ft
3
/s
Combined permissible vegetated soil shear stress
lb/ft
2
Recommended TRM category
Calculate Riprap
Calculated Riprap
Riprap Type 1
Riprap
Riprap Type 3
Riprap
Concrete
Concrete
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