Green-Ampt Infiltration Parameters: Difference between revisions
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== 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
The larger the value the capillary suction head value, the more capillary action that is achieved and the amount of infiltration that takes place. This is shown by the increase in cumulative infiltration in the graph below with a greater cumulative infiltration for the increase in the suction head.<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 porosity value that the longer it takes the hydrograph to start rising, as rainfall is used to fill
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