Green-Ampt Infiltration Parameters: Difference between revisions
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Where the inbuilt USDA soil types, are not used, the user can specify their own values for the Suction, Hydraulic Conductivity, Porosity, Initial Soil Moisture and max ponding depth. What follows is a description of each parameter and the sensitivity to a low, medium and high value based on the USDA soil type values.<br>
=== Capillary Suction Head ===
The suction head, represented in millimeters, is the capillary attraction on the soil voids. It is large for fine grain soils such as clays and smaller for sandy soils.<br>
To test the sensitivity of the simulated runoff at a gauged location, a low (49.5), mid representing the mean (184.4) and high (316.3) value of the suction head parameter were used with other parameters representing a clay soil (soil type 1).<br>
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'''Figure 4: Sensitivity of simulated flow at the Cefn-Brwn gauge location in the Plynlimon Gwy catchment to the Suction head parameter in the Green-Ampt infiltration model.'''<br>
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''It can also be seen that the higher the
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