Validating laboratory assessment of threshold electrolyte concentration for fields irrigated with marginal quality saline-sodic water
Article
Article Title | Validating laboratory assessment of threshold electrolyte concentration for fields irrigated with marginal quality saline-sodic water |
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ERA Journal ID | 5245 |
Article Category | Article |
Authors | Dang, A. (Author), Bennett, J. McL. (Author), Marchuk, A. (Author), Marchuk, S. (Author), Biggs, A. J. W. (Author) and Raine, S. R. (Author) |
Journal Title | Agricultural Water Management |
Journal Citation | 205, pp. 21-29 |
Number of Pages | 9 |
Year | 2018 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0378-3774 |
1873-2283 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.agwat.2018.04.037 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0378377418304967 |
Abstract | The use of marginal quality saline-sodic (MQSS) water for agricultural production is important in water limited environments and with a growing demand for food and fibre. Soil structural response to irrigation water quality is known to be a function of sodium contained in the irrigation water and the electrolyte concentration of that water. The threshold electrolyte concentration (CTH) is classically used to determine the suitability of water to be applied to a soil, and is usually conducted as a laboratory analysis utilising saturated hydraulic conductivity. This work aimed to validate the laboratory based semi-empirical disaggregation model approach to CTH against field soils where MQSS water had been applied for an extended period of time. Unirrigated locations proximal to long-term irrigation sites were paired to provide control conditions and the CTH was determined. Reduction in hydraulic conductivity from the control was determined as both observed and predicted data. Results supported validation of the approach, indicating the disaggregation model as useful for proactive planning of irrigation systems with regard to water quality and a good measure for identification of MQSS water as a strategic resource. Applicability of the results to irrigation guidelines was discussed with particular focus on removal of generalised guidelines and identification of what constitutes tolerable hydraulic conductivity reduction. |
Keywords | dispersion; swelling; aggregate stability; threshold turbidity concentration |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 410604. Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) |
410605. Soil physics | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Southern Queensland |
Department of Natural Resources, Mines and Energy, Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4x8x/validating-laboratory-assessment-of-threshold-electrolyte-concentration-for-fields-irrigated-with-marginal-quality-saline-sodic-water
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