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Detailed Reference Information |
Warrick, A.W. and Knight, J.H. (2003). Steady infiltration from line sources into a layered profile. Water Resources Research 39: doi: 10.1029/2003WR001982. issn: 0043-1397. |
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Two-dimensional unsaturated flow emanating from an array of line sources is analyzed for a stratified soil. The present work extends earlier solutions for flow from an array of line sources into a homogeneous soil to the more complex and realistic case of layered conditions. The hydraulic conductivity is of the form Ki exp(αh) where the saturated conductivity Ki is different in each stratum considered, α is a constant in the entire flow domain, and h is the pressure head. An interesting feature of the derived solution is the use of an expression of the gradients of the stream function at the strata interfaces. This is analogous to the change in slope of path lines crossing a region of contrasting conductivities for saturated flow. For a two-layer example, a build-up of pressures is shown within a layer of lower permeability overlying a more conductive soil. The effect of an included finite stratum on spreading (for an inclusion layer of lower permeability) or concentrating flow (for an inclusion layer of higher permeability) is also shown using a three-layered domain. |
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Abstract |
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Keywords
Hydrology, Soil moisture, Hydrology, Unsaturated zone, Hydrology, Groundwater hydrology |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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