A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Vadose Zone Permeability Tests: Steady State Results
Free surface and saturated-unsaturated flow models are applied to the problem of constant head borehole infiltrat1on tests for determining saturated hydraulic conductivity above a water table. The free surface model follows the same general approach employed to develop analytical solutions, but this model does not suffer from some of the many simplifying assumptions regarding boundary conditions. Nonetheless, the results of steady state simulations with the free surface model agree rather well with the analytical solutions. The free surface approach provides a distorted view of the infiltration process. Saturated-unsaturated models used to simulate quasi-steady state conditions indicated that only a small volume of soil in the vicinity of the borehole is completely saturated with water. Based on saturated-unsaturated simulations in four different homogeneous, isotropic soils, an empirical solution is developed for deep water table conditions to estimate saturated hydraulic conductivity with improved accuracy. Due to the effects of borehole geometry unsaturated soil characteristics, water table depth, heterogeneity, and anisotropy, it is extremely difficult to develop a completely general formula.
Vadose Zone Permeability Tests: Steady State Results
Free surface and saturated-unsaturated flow models are applied to the problem of constant head borehole infiltrat1on tests for determining saturated hydraulic conductivity above a water table. The free surface model follows the same general approach employed to develop analytical solutions, but this model does not suffer from some of the many simplifying assumptions regarding boundary conditions. Nonetheless, the results of steady state simulations with the free surface model agree rather well with the analytical solutions. The free surface approach provides a distorted view of the infiltration process. Saturated-unsaturated models used to simulate quasi-steady state conditions indicated that only a small volume of soil in the vicinity of the borehole is completely saturated with water. Based on saturated-unsaturated simulations in four different homogeneous, isotropic soils, an empirical solution is developed for deep water table conditions to estimate saturated hydraulic conductivity with improved accuracy. Due to the effects of borehole geometry unsaturated soil characteristics, water table depth, heterogeneity, and anisotropy, it is extremely difficult to develop a completely general formula.
Vadose Zone Permeability Tests: Steady State Results
Stephens, Daniel B. (author) / Neuman, Shlomo P. (author)
Journal of the Hydraulics Division ; 108 ; 640-659
2021-01-01
201982-01-01 pages
Article (Journal)
Electronic Resource
Unknown
Vadose Zone Permeability Tests: Summary
| ASCE | 2021
Vadose Zone Permeability Tests: Unsteady Flow
| ASCE | 2021
Ground water and vadose zone monitoring
| TIBKAT | 1990
Scaling unstable infiltration in the vadose zone
| British Library Online Contents | 1997