Effect of SAR on water infiltration under a sequential rain–irrigation management system

Suarez, Donald L.; Wood, J.; Lesch, Scott M.

doi:10.1016/j.agwat.2006.07.010

Cited by 185 publications

(127 citation statements)

References 15 publications

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“…Studies examining indirect effects of various TWE qualities (CHOUDHARY et al, 2006;MINHAS et al, 2007;TEDESCHI and DELL' AQUILA, 2005; VAN HOORN et al, 2001) are also generally based on short-term laboratory experiments, sometime using continuous water flow in packed soil columns (JALALI et al, 2008;SUAREZ et al, 2006). In the present study, the impact of the TWE irrigation on soil properties was studied under normal cropping conditions.…”

Section: Risk Of Structural Degradation Of the Soils Over The Long Termmentioning

confidence: 99%

Effects of treated wastewater irrigation on soil salinity and sodicity in Sfax (Tunisia): A case study

Belaid

Néel

Kallel

et al. 2010

rseau

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In arid regions such as near Sfax (Tunisia), treated wastewater effluents (TWE) are often applied as agricultural irrigation. Irrigation TWE usually contain large amounts of carbon, nitrogen and sodium. The objective of this study was to evaluate the impact of TWE irrigation on soil salinity and sodicity. In the city of Sfax, two sites were selected with two soil types (fluvisol and calcisol) having been irrigated for 4 and 15 years respectively. Soils were sampled at three different depths (0-30, 30-60 and 60-90 cm) in the TWE irrigated area and in a non-irrigated control area. Irrigated and non-irrigated study soils were analyzed for pH, nitrate and ammonia, electrical conductivity (ECs), exchangeable sodium percentage (ESP), sodium absorption ratio (SAR) and soil organic matter.The fluvisol, irrigated for only four years, is more affected by salinity than the calcisol irrigated for 15 years. In the upper fluvisol layer irrigated by the treated wastewater, ECs reach 8 mS•cm-1 and ESP a value of 15% while in all layers of the calcisol, ECs and ESP are lower and rarely exceed 4 mS•cm-1 and 6% respectively. This result is due to a combination of factors in the fluvisol treatment area including texture, cation exchange capacity, irrigation procedure and crop management.Dans les régions arides telles que le cas de Sfax (Tunisie), les eaux usées traitées (EUT) sont souvent utilisées en irrigation agricole. Généralement, les EUT sont riches en composés organiques, en azote et en sodium. L’objectif de cette étude est d’évaluer l’impact de l’irrigation par les EUT sur la salinité et la sodicité des sols. Dans la région de Sfax, deux sites ont été sélectionnés, représentant deux types de sols différents (fluvisol et calcisol) irrigués par les EUT, respectivement depuis 4 et 15 ans. Des échantillons des sols ont été prélevés systématiquement à trois profondeurs différentes (0-30, 30-60 et 60-90 cm) au niveau des parcelles irriguées et sur des placettes contrôle non irriguées (témoin). Sur chaque échantillon composite de sol, les pH (eau, KCl), teneurs en nitrate et ammonium, capacité d’échange cationique (CEC), conductivités électriques (CEs), taux de sodium échangeable (ESP), ratios d’absorption de sodium et teneurs en matières organiques ont été mesurés.Le fluvisol, irrigué depuis seulement quatre ans, est plus affecté par la salinité que le calcisol, irrigué depuis 15 ans. Dans les niveaux de surface du fluvisol, la CEs et l’ESP ont atteint les seuils critiques de 8 mS•cm-1 et 15 % respectivement, alors qu’au niveau du calcisol, la CEs et l’ESP sont plus faibles et dépassent rarement 4 mS•cm-1 et 5 % respectivement. Pour le fluvisol, ce résultat est dû à la combinaison de plusieurs facteurs impliquant la texture, la capacité d’échange cationique, la procédure d’irrigation et la rotation des cultures

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Section: Risk Of Structural Degradation Of the Soils Over The Long Termmentioning

confidence: 99%

Effects of treated wastewater irrigation on soil salinity and sodicity in Sfax (Tunisia): A case study

Belaid

Néel

Kallel

et al. 2010

rseau

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“…The chemical properties of the five water sources, including SAR and electric conductivity are presented in Table 1. SAR was calculated using the following equation (Suarez et al, 2006):…”

Section: Experimental-site Characteristicsmentioning

confidence: 99%

Effect of sodium adsorption ratio and electric conductivity of the applied water on infiltration in a sandy-loam soil

Aboukarima

Al-Sulaiman

Marazky

2018

WSA

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Infiltration measurements using a double-ring infiltrometer were conducted on a sandy-loam soil located in Saudi Arabia. The measurements were performed for an undisturbed soil. The effect of sodium adsorption ratio (SAR) and electric conductivity (EC) of the applied water on infiltration rate was examined. The infiltration rate at the initial time was high, in the order 305 > 240 > 137 > 104 > 65 mm/h for SAR of 3.34, 3.52, 4.14, 4.18, and 7.60, respectively. The results showed that 180 min after the initial time of measurement in the sandy-loam soil, the final infiltration rates were in the range of 21.1-44.0 mm/h for the different qualities of water considered in this study, with an average value of 33.8 mm/h. Hence, the infiltration rate is sensitive to the SAR of the applied water. The final infiltration rate (IR f ) and the final cumulative infiltration depth (Z f ) after 180 min could be predicted using the following equations:

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“…When these salts are washed from agricultural lands back into waterways, a subsequent deterioration in quality of these receiving water bodies can be expected. In addition, when irrigation water has a high proportion of sodium (Na) cations in relation to magnesium (Mg) and calcium (Ca) cations, a sodicity hazard is presented as high Na levels can lead to clay particle de-flocculation and impede infiltration (Suarez et al, 2006). …”

Section: Introductionmentioning

confidence: 99%

River water quality in the northern sugarcane-producing regions of South Africa and implications for irrigation: A scoping study

Laan¹,

Antwerpen²,

Bristow³

2012

WSA

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Sustainable cultivation of crops under irrigation requires water of appropriate quality, especially with regards to salinity and sodicity. Agriculture can impact negatively on water quality, often through the export of nutrients (particularly nitrogen (N) and phosphorus (P)) from the root zone, resulting in eutrophication of surface water and pollution of groundwater. Sugarcane is the major irrigated crop with regards to area cultivated in the Crocodile, Komati-Lomati and Pongola River catchments. Increasing demand for and use of water resources in these catchments has led to concerns about deterioration in water quality. In this study, chemical water quality data obtained from the South African Department of Water Affairs was used to assess the quality of river water in the above catchments. Electrical conductivity (EC) data show an increase in salt concentration along the river course as a result of various anthropogenic activities in the catchment. Irrigators located further downstream will therefore generally have to pay more attention to the quality of their irrigation water and on-farm salinity management. For the lower parts of the Komati-Lomati and Pongola River catchments, hazards due to sodicity will also need attention. Interestingly, acidifying effects of mine water drainage are potentially being countered by high salt input from agricultural return flow. Nutrient enrichment was evident at many of the river sampling points. Increasing salt, sodicity, N and P over time for most of the rivers studied is also a concern that requires action to ensure the sustainability of irrigation activities in these catchments. More intensive monitoring, including measurement of organic N and P fractions, is recommended to improve understanding of the contribution of different anthropogenic activities to river water pollution and to develop effective mitigation strategies.

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Effect of SAR on water infiltration under a sequential rain–irrigation management system

Cited by 185 publications

References 15 publications

Effects of treated wastewater irrigation on soil salinity and sodicity in Sfax (Tunisia): A case study

Effects of treated wastewater irrigation on soil salinity and sodicity in Sfax (Tunisia): A case study

Effect of sodium adsorption ratio and electric conductivity of the applied water on infiltration in a sandy-loam soil

River water quality in the northern sugarcane-producing regions of South Africa and implications for irrigation: A scoping study

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