In addition to the standard empirical flow resistance coefficients including the Chezy coefficient, C; the Darcy–Weisbach friction factor, f; and the Manning’s roughness coefficient, n, there is...

In addition to the standard empirical flow resistance coefficients including the Chezy coefficient, C; the Darcy–Weisbach friction factor, f; and the Manning’s roughness coefficient, n, there is another commonly used flow resistance coefficient; namely the Hazen–Williams roughness coefficient, Ch (see Table 8.8). Give the empirically derived Hazen–Williams equation derived assuming the BG system