Gitirana and Fredlund (2004) Fit

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SVSoils

 

 

The Gitirana and Fredlund dialog contains the equation parameters necessary to mathematically represent the SWCC curve with the equation published by Gitirana and Fredlund (2004). A description of the theory can be found in the SVSOILS Theory Manual.

 

Yb: The Yb field refers to a fitting parameter in the Gitirana and Fredlund (2004) equation. The Yb parameter is indirectly related to the air-entry value of the soil.

 

Y res: The Y res field refers to another fitting parameter in the Gitirana and Fredlund (2004) equation. The Y res parameter is the residual suction for a soil.

 

S res: The S res field refers to another fitting parameter in the Gitirana and Fredlund (2004) equation. S res is the residual degree of saturation for a soil.

 

agg: The agg field refers to another fitting parameter in the Gitirana and Fredlund (2004) equation. agg is a measure of the sharpness of curvature experienced at each break point along the fitted curve.

 

Fit: The Fit indicates whether the experimental data has been fit with the Gitirana and Fredlund (2004) equation.

 

Error: The Error field shows the difference between the fitted data and the laboratory values in terms of R2.

 

Residual WC: The Residual WC refers to the calculated residual gravimetric water content using the Gitirana and Fredlund (2004) equation.

 

AEV: The AEV is the air-entry value calculated using the Gitirana and Fredlund (2004) fit of the soil-water characteristic curve (kPa).

 

Max. Slope: The Max. Slope refers to the maximum slope (on a semi-log plot) from the Gitirana and Fredlund (2004) fit of the soil-water characteristic curve (unitless).

 

Graph:

 Click the graph button at the bottom of the dialog to display a graph.