1. General Model Information

Name: SOIL PARAmeter Estimator - Software to determine hydraulic properties of unsaturated/saturated soils

Acronym: SOILPARA

Contact:

Author(s):

Abstract:

Draper Aden Environmental Modeling's SOIL PARAmeter Estimator is based on statistical pore/particle size distribution models and can be used to estimate hydraulic parameters in the van Genuchten constitutive model (Brooks Corey parameters can be estimated from these) for variably saturated soils. SOILPARA allows estimation of the unsaturated zone parameters 1) from retention data and/or conductivity or diffusivity data (Kor D vs. soil water content/ pressure) based on the public domain RETC model by M. Th. van Genuchten et al., 1991) with a WindowsTM native pre-processor that is easy to use and offers graphical output and extensive on screen help, (2) from soil texture (based on the work of Shirazi and Boersma, 1984 and Campbell, 1985) by clicking on a soil texture diagram to return percentage sand, silt and clay within the pre-processor, or (3) by selection of USDA recommended typical parameter values for various texture classes available in the SOILPARA database.

Author of the abstract:

Draper Aden Environmental Modeling, Inc. (DAEM)

II. Technical Information

II.1 Executables:

• Microsoft Windows® 3.x.
• Math co-processor
• 4MB of RAM
• 2.5MB of hard disk space

II.2 Source-code:

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

V. Further information in the World-Wide-Web

• SOILPARA

VI. Additional remarks

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