The BED cross-sectional estimation necessarily uses an "at risk" formula: BED-estimated recent infections in one year per number of persons at risk.
Assuming graded sediment, Meyer-Peter and Muller (1948) developed a formula for bed load sediment transport.
Using the percentage of patients suitable for treatment and percentage of direct contact time per therapy this gives the formula – 10 beds divided by percentage of direct patient time multiplied by percentage of patients deemed suitable for therapy.
MORSELFE couples a three-dimensional hydrodynamic model, with an advection diffusion transport model for the suspended sediments, an empirical formula for the bed load, and a bed updating module.
Similarly GFR calculated with the Cockcroft-Gault formula decreased after bed rest completion compared to baseline (11%, p-value 0.001) and 44 days of bed rest (2%, p-value 0.005).
Tanaka (1988) estimated the bottom shear stress under non-linear waves by a modified stream function theory and proposed a formula to predict bed load transport, except near the surf zone in which acceleration effects play an important role.
This paper derives local formulae to estimate bed roughness and suspended transport and present a method to calculate net sediment transport at tidal inlet systems, combining field data and a range of well established empirical formulations.
Sediment transport rates in the offshore and surf zone were computed using the sediment transport formulation proposed by Camenen and Larson [Camenen, B., Larson, M., 2005. A general formula for non-cohesive bed load sediment transport. Estuarine, Coastal and Shelf Science 63, 249-260.; Camenen, B., Larson, M., 2007. A unified sediment transport formulation for coastal inlet application.
The earliest bed load formula was developed by DuBoys (1879) assuming uniform grains moving as series of layers.
The tractive force theory based on the bed load formula suggests that the amount of sediment transported per second per unit width of a conduit q s is a function of shear stress τ (Singh 1996): {q}_s=fleft tau right) (1).
