Water Movement into Soil from I dealized Vertical Mulch Channels1
- Dale Swartzendruber2
A mathematical solution in elliptic integrals is obtained for the flow in a system of channels in water-saturated, uniform soil, assuming a very highly permeable stratum to exist at finite depth. If water enters the soil through the original soil surface as well as the channel surfaces, the increase in flow due to the channels is generally small. However, if the original soil surface is sealed, the channels are relatively effective in restoring the flow to that which occurs in the absence of the channels and surface sealing. From the analysis there emerges the simple depthspacing formula, d0 = 0.28 S, which is presented as a tentative design criterion for the placement of vertical mulch channels.
Analysis is also made for soil anisotropy in which the horizontal permeability exceeds the vertical permeability. In all cases this increases the flow contributions of the channels.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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