Fredlund 2Point (2008) Fit 
The Fredlund 2Point dialog contains the equation parameters necessary to mathematically represent the SWCC curve. The SWCC generally has two primary defining points; namely: i) the water content and suction at the air entry value for the soil, and ii) the water content and soil suction at residual conditions. There are also two additional points that define the extreme limits on the SWCC; namely, completely saturated conditions under zero suction (i.e., saturated water content and porosity), and completely dry conditions (i.e., zero water content and a soil suction of 1,000,000 kPa). This curve allows the SWCC to be represented by physically meaningful inflection points. The benefit to these physically significant points is the exact quantification that this allows whereby this type of soil representation can then lead to easing statistical analysis. The curve is represented through the following input parameters:
Click the graph button at the bottom of the dialog to display a graph.
