# Total Bed Load Calculator - Prediction of Sediment-Delivery Rate

Posted by Dinesh onCalculate total bed load by the Schoklitsch formula using this simple civil calculator online.

The quantity of bed load is considered a constant function of the discharge because the sediment supply for the bed-load forces is always available in all but lined channels. An accepted formula for the quantity of sediment transported as bed load is the Schoklitsch formula: `G`

. _{p} = (86.7 / D_{g}^{½}) * S^{3/2} * (Q_{i} - bq_{o})

An approximate solution for bed load by the Schoklitsch formula can be made by determining or assuming mean values of slope, discharge, and single grain size representative of the bed-load sediment. A mean grain size of 0.04 in (about 1 mm) in diameter is reasonable for a river with a slope of about 1.0 ft/mi (0.189 m/km).

## Total Bed Load - Schoklitsch Formula Calculation

### Formula:

G_{b} = (86.7 / D_{g}^{½}) × S^{3/2} × (Q_{i} - bq_{o})

G

_{b}- total bed load,

D

_{g}- effective grain diameter,

S - slope of energy gradient,

Q

_{i}- total instantaneous discharge,

b - width of river, ft (m),

q

_{o}- critical discharge, of river width (0.00532/S

^{4/3})D

_{g}