NASA Home Page Goddard Space Flight Center Home Page
NASA Logo - Goddard Space Flight Center   + Visit NASA.gov
a directory of Earth science data and services Global Change Master Directory Web site
header 2 bullet Links bullet FAQ bullet Contact Us bullet Site Map
Home Data Sets Data Services Learn about GCMD_legacy's portal collaborations. Add new dataset or dataservice records to GCMD_legacy What's New Participate Calendar About GCMD_legacy
 
Record Search Query: ServiceParameters>MODELS>LAND SURFACE MODELS

SWRC Fit - Scientific Statistical Tool for Hydrologist
Entry ID: swrcfit
[ Get Service ]
[ Update this Record ]


Summary
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.

Related URL
Link: GET SERVICE > GET SOFTWARE PACKAGE
Description: Download SWRC Fit.

Link: GET SERVICE
Description: SWRC Fit web interface.
Service Citation
Originators: Katsutoshi Seki
Title: SWRC Fit - Scientific Statistical Tool for Hydrologist
Release_Date: 2007-09-02
Provider: SourceForge
Edition: 2.1
URL: http://swrcfit.sourceforge.net/
ISO Topic Category
FARMING
GEOSCIENTIFIC INFORMATION
Service Provider
SourceForge.net

Service Provider Personnel
Name: KATSUTOSHI SEKI
Email: k_seki at users.sourceforge.net
Contact Address:
Toyo University
5-28-20 Hakusan
Bunkyo-ku
City: Tokyo
Postal Code: 112-8606
Country: Japan
Distribution Media
Distribution_Media: Online
Fees: No fees
Personnel
KATSUTOSHI SEKI
Role: TECHNICAL CONTACT
Email: k_seki at users.sourceforge.net
Contact Address:
Toyo University
5-28-20 Hakusan
Bunkyo-ku
City: Tokyo
Postal Code: 112-8606
Country: Japan

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Publications/References
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.
Creation and Review Dates
SERF Creation Date: 2009-03-10
SERF Last Revision Date: 2009-03-10
[ Update this Record ]
USA dot gov - The U.S. Government's Official Web Portal NASA
Webmaster:  Monica Holland
Responsible NASA Official:  Lola Olsen
Last Updated:  July 2014