Approximation of van Genuchten Parameter Ranges from Hydraulic Conductivity Data.

The use of retention function and relative conductivity function is essential for the calculation of flow in a variably saturated media using the Richards equation. A widely used mathematical model for this is the Mualem-van Genuchten model which requires the shape parameters and . These, however, are difficult to obtain.

Estimating Characteristic Grain Sizes and Effective Porosity from Hydraulic Conductivity Data.

In groundwater applications, knowledge about a range of hydraulically relevant parameters is beneficial to counteract data scarcity and enhance parameter robustness. The present study provides a novel procedure to reverse engineer representative grain diameters and effective porosity from values of hydraulic conductivity. A large data set comprising more than 500 sieve curves and more than 1000 values of hydraulic conductivity was analyzed for interparameter dependencies between characteristic grain sizes, hydraulic conductivity and effective porosity.