Determination of Soil Sorptivity and Hydraulic Conductivity from the Disk Infiltrometer

Zhang, Renduo

doi:10.2136/sssaj1997.03615995006100040005x

Cited by 445 publications

(347 citation statements)

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“…Foi utilizado o método colorimétrico (Raij et al, 2001). A taxa de infiltração de água no solo foi avaliada utilizando-se o mini infiltrômetro de disco (Zang, 1997), em agosto de 2011, realizando-se os testes nos 5 blocos e 3 repetições por parcela experimental. Neste período o solo se encontrava seco (Figura 1), pois se caracteriza a estiagem na região de estudo, conforme registros dos anos de 2010 (antecedentes à avaliação) e 2011 (ano da avaliação).…”

Section: Methodsunclassified

Matéria orgânica, infiltração e imagens tomográficas de Latossolo em recuperação sob diferentes tipos de manejo

Marchini

Ling

Alves

et al. 2015

Rev. bras. eng. agríc. ambient.

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1 R E S U M OPropôs-se, neste trabalho, verificar os efeitos de manejos em Latossolo em recuperação há sete anos. Os tratamentos estudados foram: dois controles, A -Vegetação natural de Cerrado; B -Solo exposto; além dos tratamentos, C -Área apenas com espécie arbórea Gonçalo-Alves (GA) (Astronium fraxinifolium); D -Gonçalo-Alves + Nabo forrageiro (Raphanus sativus) até 2005, substituído pela crotalária (Crotalaria juncea) (GA + C); E -Gonçalo-Alves + Feijão-de-Porco (Canavalia ensiformis) (GA + FP); F -Gonçalo-Alves + Lodo de esgoto (60 t ha -1 ) + Brachiaria decumbens (GA + LE +B). Não houve convergência com relação aos indicadores da qualidade do solo em recuperação há sete anos; o tratamento GA + Lodo de esgoto + Brachiaria decumbens foi o que melhor respondeu quanto ao teor de matéria orgânica do solo; os tratamentos usados para recuperação do solo tiveram comportamento semelhante relacionado ao da infiltração de água; os tratamentos com GA + Crotalária, GA + Feijão-de-Porco e GA + Lodo de esgoto + Brachiaria decumbens nas imagens tomográficas foram os que apresentaram melhores condições da estrutura do solo; a recuperação atingiu a camada do solo de 0-10 cm.

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Section: Methodsunclassified

Matéria orgânica, infiltração e imagens tomográficas de Latossolo em recuperação sob diferentes tipos de manejo

Marchini

Ling

Alves

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…The sorptivity S(h 0 ) and unsaturated hydraulic conductivity k(h 0 ) at suction h 0 ≤ 0 can be calculated from (ZHANG 1997):…”

Section: Methodsmentioning

confidence: 99%

The impact of vegetation on hydraulic conductivity of sandy soil

Lichner¹,

Orfánus²,

Nováková³

et al. 2007

Soil Water Res.

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The objective of this study was to assess the impact of vegetation on the hydraulic conductivity of sandy soil at the locality Mláky II at Sekule (southwest Slovakia). The measurements were taken on the surface of a meadow (Meadow site), a 30-year old Scots pine (Pinus sylvestris) forest (Forest site) and a glade (Glade site). In the glade, the measurements were also taken in the depth of 50 cm (Pure sand) to reduce the influence of vegetation on the soil properties. It was found that the unsaturated hydraulic conductivity kr(−2 cm) as reduced due to the soil water repellency increased in the same order: Forest soil < Glade soil ≈ Meadow soil < Pure sand, similarly as decreased the water drop penetration time tp: Forest soil > Glade soil ≈ Meadow soil > Pure sand, which could refer to an inverse proportionality between the capillary suction and hydrophobic coating of the soil particles. The saturated hydraulic conductivity Ks increased in the following order: Meadow soil < Glade soil ≈ Forest soil < Pure sand; more than two-times higher Ks at both the Forest and Glade sites than that at the Meadow site could be the result of both the patchy growth of vegetation with some areas of bare soil at the Glade site and the macropores (dead roots) in more homogeneous humic top-layer at the Forest site. The share Br of flux through the pores with radii r longer than approximately 0.5 mm decreased in the order: Forest soil » Meadow soil > Glade soil » Pure sand, revealing the prevalence of preferential flow through macropores (dead roots) in the Forest site and a negligible share of macropores in the Pure sand.

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“…During the measurement, the volume of the water in the reservoir chamber was documented in regular intervals. Infiltration is computed from the cumulative infiltration records vs. time following Zhang (1997) and Carsel and Parrish (1988) ) are parameters related to HC (C 1 ) and soil sorptivity (C 2 ). The HC of the soil (k) was calculated from…”

Section: Measurement Of Soil Hydraulic Conductivitymentioning

confidence: 99%

Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

Schacht

Marschner

2015

Journal of Hydrology and Hydromechanics

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Abstract:The use of treated wastewater (TWW) for agricultural irrigation becomes increasingly important in water stressed regions like the Middle East for substituting fresh water (FW) resources. Due to elevated salt concentrations and organic compounds in TWW this practice has potential adverse effects on soil quality, such as the reduction of hydraulic conductivity (HC) and soil aggregate stability (SAS). To assess the impact of TWW irrigation in comparison to FW irrigation on HC, in-situ infiltration measurements using mini disk infiltrometer were deployed in four different long-term experimental orchard test sites in Israel. Topsoil samples (0-10 cm) were collected for analyzing SAS and determination of selected soil chemical and physical characteristics.The mean HC values decreased at all TWW sites by 42.9% up to 50.8% compared to FW sites. The SAS was 11.3% to 32.4% lower at all TWW sites. Soil electrical conductivity (EC) and exchangeable sodium percentage (ESP) were generally higher at TWW sites. These results indicate the use of TWW for irrigation is a viable, but potentially deleterious option, as it influences soil physical and chemical properties.

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Determination of Soil Sorptivity and Hydraulic Conductivity from the Disk Infiltrometer

Cited by 445 publications

References 0 publications

Matéria orgânica, infiltração e imagens tomográficas de Latossolo em recuperação sob diferentes tipos de manejo

Matéria orgânica, infiltração e imagens tomográficas de Latossolo em recuperação sob diferentes tipos de manejo

The impact of vegetation on hydraulic conductivity of sandy soil

Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

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