Asymptotic infiltration into a soil which contains cracks or holes but whose surface is otherwise impermeable
✍ Scribed by Malcolm R. Davidson
- Book ID
- 104639845
- Publisher
- Springer Netherlands
- Year
- 1987
- Tongue
- English
- Weight
- 479 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0169-3913
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✦ Synopsis
An asymptotic, one-dimensional Green-Ampt model is derived for infiltration into a soil whose surface is impermeable except for regularly spaced vertical cracks, and infiltration into a cylindrical soil column whose top surface is also impermeable except for a central hole. The model is valid at times when the wetting front has become horizontal and corresponds to one-dimensional infiltration initiated from a plane lying above or below the soil surface, depending on the crack spacing/depth ratio (or column radius/hole depth ratio). When applicable, asymptotic Green-Ampt solutions are.shown to agree well, in selected cases, with corresponding finite difference solutions of the saturated-unsaturated flow equations.