HEC-15 Gravel/Riprap Lining Design

Units: English Metric

Stone shape: Crushed Very angular Very rounded

Input Flow Q (ft3/s) Median Size D50 (ft) Bottom Width B (ft) Side slope (1:Z1) Side slope (1:Z2) Grade So (%) Stone specific weight γs (N/m3)

Results Flow depth d (ft): x.xx Manning's n: x.xx Top width T (ft): x.xx Average velocity V (ft/s): x.xx Froude number: x.xx Average depth da (ft): x.xx Depth ratio da/D50: x.xx Stable D50 (in): x.xx Delta (Δ, Z1): x.xx Delta (Δ, Z2): x.xx Stable D50 (in): x.xx

: Angle of Repose (°): Revised 13 July 2017.