Redistribution of water and solute following infiltration from a surface drip source

Laboratory, observations of the redistribution of water and solute, following one-dimensional and three-dimensional constant flux infiltration, reveal distinctly different paterns of water and chemical transport. The geometry-induced enhancement of capillarity, over gravity in three dimensions is th...

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Bibliographic Details
Published in:Water resources research 1991-08, Vol.27 (8), p.2091-2097
Main Authors: Clothier, Brent, Sauer, Tom, Scotter, Dave
Format: Article
Language:English
Subjects:
infiltracion
infiltration
irrigation goutte a goutte
mouvement de l' eau dans le sol
movimiento del agua en el suelo
procesos de transporte en el suelo
riego por goteo
sandy soils
soil transport processes
soil water movement
sol sableux
solute
solutes
soluto
suelo arenoso
textural soil types
tipos texturales de suelos
transport dans le sol
trickle irrigation
type de sol textural
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Summary:Laboratory, observations of the redistribution of water and solute, following one-dimensional and three-dimensional constant flux infiltration, reveal distinctly different paterns of water and chemical transport. The geometry-induced enhancement of capillarity, over gravity in three dimensions is thought responsible for the rapid attainment during redistribution of a near-constant water content, some radial distance r around the dripper. This renders simple the prediction of the maximum radial extent of convective solute redistribution, r. Nevertheless, molecular diffusion about r is the dominant mode of solute transport during the weak convective redistribution in three dimensions.
ISSN:0043-1397
1944-7973
DOI:10.1029/91WR00938