Fig. 9. (a) Variation of coefficient A(t) of Eq. [20] from fitted I_p/(_s – _i)^1/2 vs. relations with infiltration times for different rainfall intensities; (b) Variation of coefficient B(t) of Eq. [20] from fitted I_p/(_s – _i)^1/2 vs. relations with infiltration times for different rainfall intensities.