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Unstable Water Flow in a Layered Soil

I. Effects of a Stable Water-Repellent Layer

M.L.K. Carrilloa, J. Leteya and S.R. Yatesb

a Dep. of Soil and Environ. Sci., Univ. of California, Riverside, CA 92521 USA
b USDA-ARS, Soil Physics and Pesticides Res. Unit, U.S. Salinity Lab., Riverside, CA 92507 USA



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Fig. 1 Infiltration chamber front and side view

 


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Fig. 2 Experimental set-up of chamber study showing video equipment, chamber and data collection system

 


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Fig. 3 Effects of ho, L, and hp on finger formation. (a) ho = 3.5, L = 5, hp = 8.1; (b) ho = 5, L = 5, hp = 8.1; (c) ho = 7, L = 5, hp = 8.1; (d) ho = 10, L = 5, hp = 8.1; (e) ho = 5, L = 15, hp = 8.1; (f) ho = 5, L = 5, hp = 4.0

 


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Fig. 4 Effects of increasing the ratio (ho + L)/hp on the fraction of area wetted in wettable sublayer

 


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Fig. 5 Column (Jw) and chamber (Jcham) flux as a function of the ratio ho/hp or (ho + L)/hp

 


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Fig. 6 Hydraulic conductivity as a function of ho/hp

 


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Fig. 7 Hydraulic conductivity as a function of the volumetric water content

 





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