Green-Ampt Infiltration Parameters: Difference between revisions

The Green-Ampt approach varies the rate of infiltration over time based on the soil’s hydraulic conductivity, suction, porosity and initial moisture content. The method assumes that as water begins to infiltrate the soil, a line developed differentiating between the ‘dry’ soil with moisture content θ_i) and the ‘wet’ soil (with moisture content equal to the porosity of the soil η). As the infiltrated water continues to move through the soil profile in a vertical direction, the soil moisture changes instantly from the initial content to a saturated state. This concept is shown in Figure 1.<br>

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'''Figure 1 Green-Ampt Model Concept'''<br>

The basic form of the Green-Ampt equation is expressed as follows:<br>

:::::f(t)=K(1+ ∆θ(φ+h_0 )/(F(t)))<br>