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SWRC Fit

The soil hydraulic parameters for analyzing water movement in variably saturated soil can be determined by fittig soil hydraulic model to a soil water retention curve. SWRC Fit performs nonlinear fitting of various soil hydraulic models to measured soil water retention curve; the relationship between the soil water potential and volumetric water content.

This software is primarily intended for scientists in the field of hydrology and geoscience to help their research. It has been extensively used and cited in over 200 scientific papers.

Web interface

Please use SWRC Fit.

Citation

Please cite this paper when you publish your work using SWRC Fit.

Seki, K. (2007) SWRC fit - a nonlinear fitting program with a water retention curve for soils having unimodal and bimodal pore structure. Hydrol. Earth Syst. Sci. Discuss., 4: 407-437. doi:10.5194/hessd-4-407-2007

Migration to unsatfit

From January 4, 2022, development of the GNU Octave version of SWRC Fit was migrated to a Python library unsatfit. Unsatfit also performs fitting of unsaturated hydraulic conductivity function. The web version shown above uses unsatfit as a library and performs fitting of water retention function only, and is still called SWRC Fit. The source code of the new SWRC Fit is published with unsatfit.

The source code of the GNU Octave version is available at sourceforge and GitHub. It is no longer used, developed or maintained by the author.