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Seepage into Stratified Water‐Saturated Soil from Idealized Vertical Mulch Channels
Author(s) -
Swartzendruber Dale
Publication year - 1964
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1964.03615995002800030008x
Subject(s) - stratum , subsoil , stratified flow , geology , flow (mathematics) , soil science , geotechnical engineering , hydrology (agriculture) , soil water , mechanics , geometry , mathematics , turbulence , physics
A general theoretical method of approximating the steady‐state, two‐dimensional seepage rate in stratified porous media is applied to the problem of water flow into stratified water‐saturated soil in the presence of idealized subsoil channels. The approximation, for the present problem estimated to be accurate within 10%, is obtained by considering the stratified system in 3 special, mathematically degenerate cases for which exact solutions are available. When a less permeable surface soil stratum overlies a more permeable stratum, the flow effect of the channels always exceeds that found for channels in a uniform soil and becomes quite marked if the channels penetrate the upper, less permeable stratum and extend into the more permeable stratum below. If the more permeable stratum overlies the less permeable stratum, the flow effect of the channels is less than in a uniform soil.