Water flow and conductivity into capillary and non-capillary pores of soils

Downward water flow in the vadose zone occurs principally through the non-capillary pores, while the redistribution and lateral and upward flow occurs in the capillary pores. The purpose of this study was to propose equations to estimate water flow, Q(), and hydraulic conductivity, K(), in the capil...

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Autor principal:	Amer,Abdelmonem M
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2012
Materias:	Unsaturated hydraulic conductivity soil pore size water infiltration and sorptivity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000100009
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spelling	oai:scielo:S0718-951620120001000092018-11-05Water flow and conductivity into capillary and non-capillary pores of soilsAmer,Abdelmonem M Unsaturated hydraulic conductivity soil pore size water infiltration and sorptivity Downward water flow in the vadose zone occurs principally through the non-capillary pores, while the redistribution and lateral and upward flow occurs in the capillary pores. The purpose of this study was to propose equations to estimate water flow, Q(), and hydraulic conductivity, K(), in the capillary and non-capillary soil pores. The equations related K() to soil pore radius (r) were based on soil hydraulic data, including water retention h(q), field basic infiltration rate, water sorptivity (S) and distribution density function f(r) of the soil pore size. Calcareous sandy loam and alluvial clay soils located at the Nile Delta were used to test the validity of the assumed equations. Data showed that the values of K() calculated by the proposed equations were in the common ranges for such soils. The equations are therefore expected to be applicable for both coarse and fine textured soils. Also, an equation was derived to estimate the sorptivity at steady state infiltration. It was observed that S is decreased in going from the un-saturation condition to steady state infiltration by 15.1% and 45.9% in sandy loam and clay soils, respectively.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.12 n.1 20122012-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000100009en10.4067/S0718-95162012000100009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Unsaturated hydraulic conductivity soil pore size water infiltration and sorptivity
spellingShingle	Unsaturated hydraulic conductivity soil pore size water infiltration and sorptivity Amer,Abdelmonem M Water flow and conductivity into capillary and non-capillary pores of soils
description	Downward water flow in the vadose zone occurs principally through the non-capillary pores, while the redistribution and lateral and upward flow occurs in the capillary pores. The purpose of this study was to propose equations to estimate water flow, Q(), and hydraulic conductivity, K(), in the capillary and non-capillary soil pores. The equations related K() to soil pore radius (r) were based on soil hydraulic data, including water retention h(q), field basic infiltration rate, water sorptivity (S) and distribution density function f(r) of the soil pore size. Calcareous sandy loam and alluvial clay soils located at the Nile Delta were used to test the validity of the assumed equations. Data showed that the values of K() calculated by the proposed equations were in the common ranges for such soils. The equations are therefore expected to be applicable for both coarse and fine textured soils. Also, an equation was derived to estimate the sorptivity at steady state infiltration. It was observed that S is decreased in going from the un-saturation condition to steady state infiltration by 15.1% and 45.9% in sandy loam and clay soils, respectively.
author	Amer,Abdelmonem M
author_facet	Amer,Abdelmonem M
author_sort	Amer,Abdelmonem M
title	Water flow and conductivity into capillary and non-capillary pores of soils
title_short	Water flow and conductivity into capillary and non-capillary pores of soils
title_full	Water flow and conductivity into capillary and non-capillary pores of soils
title_fullStr	Water flow and conductivity into capillary and non-capillary pores of soils
title_full_unstemmed	Water flow and conductivity into capillary and non-capillary pores of soils
title_sort	water flow and conductivity into capillary and non-capillary pores of soils
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000100009
work_keys_str_mv	AT amerabdelmonemm waterflowandconductivityintocapillaryandnoncapillaryporesofsoils
_version_	1714206425401524224

Water flow and conductivity into capillary and non-capillary pores of soils

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