When we fit the linearized function, the slope is S/2, thus S can be calculated as 2 x slope. S is the sorptivity parameter of the soil, which is a measure of the capacity of the soil to absorb water by capillary, at later times when the soil becomes saturated, S is no longer very important: en.wikipedia.org/wiki/Sorptivity
what is mean (S/2) and (S)
When we fit the linearized function, the slope is S/2, thus S can be calculated as 2 x slope. S is the sorptivity parameter of the soil, which is a measure of the capacity of the soil to absorb water by capillary, at later times when the soil becomes saturated, S is no longer very important: en.wikipedia.org/wiki/Sorptivity