Soil water characteristic curve (SWCC) is one of the most important parameters for unsaturated porous media. Full SWCC is made up of 3 parts
which are initial drying curve(IDC)
main drying curve(MDC) and main wetting curve(MWC) respectively. A lot of time has to be spent to perform a traditional hydralic hesteresis test. Based on the data from literatures
an empirical model is developed. Provided IDC and MWC in a certain porous media have been obtained by tests; this model
including only one material parameter
can be used to simulate an incremental-type MDC in the porous media. It is found that the simulating results agree well with the measured data; and it is shown that the proposed model is capable to describe MDC