VZJ
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
 QUICK SEARCH:   [advanced]


     


This Article
Right arrow Abstract Freely available
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (1)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Hunt, A. G.
Right arrow Articles by Skinner, T. E.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Hunt, A. G.
Right arrow Articles by Skinner, T. E.
GeoRef
Right arrow GeoRef Citation
Agricola
Right arrow Articles by Hunt, A. G.
Right arrow Articles by Skinner, T. E.
Related Collections
Right arrow Soil Physics
Right arrow Analytical Solutions
Right arrow Pore-Scale Modeling
Right arrow Soil Hydrology

Hydraulic Conductivity Limited Equilibration

Effect on Water Retention Characteristics

A. G. Hunta,* and T. E. Skinnerb

a Departments of Physics and Geology, Wright State University, Dayton, OH 45435
b Department of Physics, Wright State University, Dayton, OH 45435



View larger version (12K):

[in a new window]
 
Fig. 1. Hydraulic conductivity as a function of moisture content. Open squares combine regimes of validity of Eq. [4] and [6]. Thin line, extending to smaller moisture contents, represents continued application of Eq. [4]. D = 2.84, {phi} = 0.44, KS = 0.01, {theta}t = 0.107.

 


View larger version (18K):

[in a new window]
 
Fig. 2. Water retention curve consistent with Eq. [2] for the same parameters as in Fig. 1 and an air entry pressure, hA = 40 cm. Portion near {theta} = 0.12 with strong upward curvature represents effects of deviation from equilibrium according to algorithm described in text. Continuation of Eq. [2] to {theta} < {theta}t is not justified except for purposes of illustration.

 


View larger version (13K):

[in a new window]
 
Fig. 3. LogK vs. hydraulic head, h. Open triangles represent equilibrium K values. x values assume validity of Eq. [4] for K for entire range. The solid curve represents typical nonequilibrium values of K(h).

 


View larger version (11K):

[in a new window]
 
Fig. 4. Comparison of prediction of algorithm (described in text) with experimental water retention curve for the USDOE Hanford site soil, ITS 2-1418 (Freeman, 1995). {theta}t taken from lowest {theta} value achieved; {theta}1 is calculated from Eq. [6] and shown with an arrow. Open squares consistent with Rieu and Sposito (1991) fractal scaling over entire range of moisture contents. Filled diamonds represent experimental values from Freeman (1995). Open circles are moisture contents predicted by algorithm described here.

 


View larger version (11K):

[in a new window]
 
Fig. 5. Same as Fig. 4, except using ITS 2-2232 (Freeman, 1995).

 


View larger version (10K):

[in a new window]
 
Fig. 6. Same as Fig. 4, except using USMW 10-86 (Freeman, 1995).

 


View larger version (10K):

[in a new window]
 
Fig. 7. Same as Fig. 4, except using ITS 2-2230 (Freeman, 1995).

 


View larger version (10K):

[in a new window]
 
Fig. 8. Same as Fig. 4, except using ITS 2-2229 (Freeman, 1995).

 


View larger version (10K):

[in a new window]
 
Fig. 9. Same as Fig. 4, except using FLTF D11-08 (Freeman, 1995).

 


View larger version (10K):

[in a new window]
 
Fig. 10. Same as Fig. 4, except using USMW 10-45 (Freeman, 1995).

 





HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education
Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality
The Plant Genome
Copyright © 2005 by the Soil Science Society of America.