[Science_Parameters: Science_Category='EARTH SCIENCE', Science_Topic='AGRICULTURE', Science_Term='SOILS', Science_Variable_Level_1='SOIL MOISTURE/WATER CONTENT']
SWRC Fit - Scientific Statistical Tool for HydrologistEntry ID: swrcfit
Abstract: 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 5 soil hydraulic models to measured soil water retention curve.
-It is written in numerical calculation language GNU Octave.
-Web interface is also available.
-Initial estimate of parameters is automatically determined by the program.
-Five models are (1) Brooks and Corey model, (2) van Genuchten model, (3) Kosugi model, (4) Durner model and (5) Seki model.
This software is primarily intended for scientists in the field of hydrology and geoscience to help their research. It may also be used for educational purposes.
Role: TECHNICAL CONTACT
Email: k_seki at users.sourceforge.net
Toyo University 5-28-20 Hakusan Bunkyo-ku
Postal Code: 112-8606
Role: SERF AUTHOR
Email: Tyler.B.Stevens at nasa.gov
5700 Rivertech Court
Province or State: MD
Postal Code: 20737
Brooks, R.H., and A.T. Corey (1964): Hydraulic properties of porous media. Hydrol. Paper 3. Colorado State Univ., Fort Collins, CO, USA.
Durner, W. (1994): Hydraulic conductivity estimation for soils with heterogeneous pore structure. Water Resour. Res., 30(2): 211-223.
Kosugi, K. (1996): Lognormal distribution model for unsaturated soil hydraulic properties. Water Resour. Res. 32: 2697-2703.
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. SRef-ID: 1812-2116/hessd/2007-4-407
van Genuchten, M. (1980): A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44:892-898.
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