A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Selection of a numerical unsaturated flow code for tilted capillary barrier performance evaluation
Capillary barriers consisting of tilted fine-over-coarse layers have been suggested as landfill covers as a means to divert water infiltration away from sensitive underground regions under unsaturated flow conditions, especially for arid and semi-arid regions. This study evaluates a number of candidate mechanistic unsaturated flow codes for application to tilted capillary barriers. Factors considered included unsaturated flow modeling, inclusion of evapotranspiration, nodalization flexibility, ease of modification, and numerical efficiency. The codes chosen for this evaluation are TOUGH2, FEHM, and SWMS( )2D. All three codes chosen for this evaluation successfully simulated the capillary barrier problem chosen for the code comparison, although FEHM used a reduced grid. The numerical results are a strong function of the numerical weighting scheme. For the same weighting scheme, similar results were obtained from the various codes. 44 refs.
Selection of a numerical unsaturated flow code for tilted capillary barrier performance evaluation
Capillary barriers consisting of tilted fine-over-coarse layers have been suggested as landfill covers as a means to divert water infiltration away from sensitive underground regions under unsaturated flow conditions, especially for arid and semi-arid regions. This study evaluates a number of candidate mechanistic unsaturated flow codes for application to tilted capillary barriers. Factors considered included unsaturated flow modeling, inclusion of evapotranspiration, nodalization flexibility, ease of modification, and numerical efficiency. The codes chosen for this evaluation are TOUGH2, FEHM, and SWMS( )2D. All three codes chosen for this evaluation successfully simulated the capillary barrier problem chosen for the code comparison, although FEHM used a reduced grid. The numerical results are a strong function of the numerical weighting scheme. For the same weighting scheme, similar results were obtained from the various codes. 44 refs.
Selection of a numerical unsaturated flow code for tilted capillary barrier performance evaluation
S. W. Webb (author)
1996
40 pages
Report
No indication
English
Prediction of tilted capillary barrier performance
| NTIS | 1997
The Capillary Barrier Effect in Unsaturated Flow Through Soil Barriers
| British Library Conference Proceedings | 1994
Geocomposite capillary barrier drain for unsaturated drainage of pavements
| British Library Conference Proceedings | 2002
Evaluation of numerical simulations of capillary barrier field tests
| Online Contents | 1998
Parametric Study of Unsaturated Drainage Layers in a Capillary Barrier
| British Library Online Contents | 1999