van Genuchten (1980) and Mualem Fit (1976)

Previous pageReturn to chapter overviewReturn to Top Next page

 

 

 

 

 

 

 

 

SVSoils

 

 

The van Genuchten-Mualem dialog contains the equation parameters necessary to mathematically represent the SWCC equation published by van Genuchten (1980) and Mualem (1976). A description of the theory can found in the SVSOILS Theory Manual.

 

am(a): The am field refers to a fitting parameter in Mualem (1976) equation. The am parameter is indirectly related to the air-entry value of the soil.

 

nm: The nm field refers to another fitting parameter in Mualem (1976) equation. The nm parameter is related to the steepness of the SWCC.

 

Fit: The Fit indicates whether the experimental data has been fit with the Mualem (1976) equation.

 

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

 

Residual WC, wr: The Residual WC field refers to the calculated residual gravimetric water content from the Mualem (1976) equation.

 

AEV: The AEV field shows the air-entry value calculated from the Mualem (1976) fit of the soil-water characteristic curve (kPa).

 

Max. Slope: The Max. Slope refers to the maximum slope (on a semi-log plot) of the Mualem (1976) fit of the soil-water characteristic curve (unitless).

 

Graph:

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