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Groundwater response and salt removal in a saline-seep soil in southern Alberta
Authors: G.D. Buckland and M.J. Hendry
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Download file: https://library.csbe-scgab.ca/docs/journal/34/34_2_125_ocr.pdf
Published in: CBE Journal » CBE Journal Volume 34 (1992)
Download RAW file: https://library.csbe-scgab.ca/docs/journal/34/34_2_125_raw.pdf
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Description: A study comparing subsurface drainage and irrigation, alone and in combination, was conducted for three years on a severe saline seep (electrical conductivity of saturated soil extract, ECe, up to 51 dS?m~ ) in southern Alberta. Changes in soil salinity and response of groundwater and soil water to imposed treatments of irrigated non-drained, irrigated drained, non-irrigated drained and control were determined. Immediately following irriga tion, groundwater gradients generally changed from upward to downward. Upward gradients were observed in the non-irrigated treatments, except in the control treatment where downward gradi ents occurred following rainfalls of 54 mm or more. Soil matric potential at the 0.15-m depth was usually at or above field capacity (30 kPa) for all treatments. Irrigation and rainfall induced downward matric potential gradients between soil depths of 0.15 and 0.60 m. After three years, average profile ECe (0-1.2 m) of the irrigated non-drained, irrigated drained, non-irrigated drained and control treatments were 67, 60, 104 and 99% of initial levels, respectively. Corresponding sodium adsorption ratios were 79,79,131 and 120%. Desalinization in the irrigated non-drained and irrigated drained treatments is attributed to changes in groundwater and soil matric potential gradients resulting from irrigation. Minor desalinization also occurred in some years in the non-irrigated drained and control treatments and is attributed to high rainfall events. All treatments rcsalinized during the non-irrigated season, in one or more years, but the relative degree of resalinization was greatest in the irrigated non-drained treatment. Results suggest irrigation had a dominant effect in removing salt from the soil of this study and subsurface drainage had a minor effect. Control of salinity in this soil using irrigation, drainage, or both, may not be practical because upward groundwater gradients and overwinter resalinization restricted salt removal and may not be desirable because of potential off-site im pacts.
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Citation: G.D. Buckland and M.J. Hendry 1992. GROUNDWATER RESPONSE AND SALT REMOVAL IN A SALINE-SEEP SOIL IN SOUTHERN ALBERTA. Canadian Agricultural Engineering 34(2):125-134.
Volume: 34
Issue: 1
Pages -
Contributor:
Date: 1992
Technical field:
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Type: Text.Article
Format: PDF
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Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
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Other files:
DOI:
Description: A study comparing subsurface drainage and irrigation, alone and in combination, was conducted for three years on a severe saline seep (electrical conductivity of saturated soil extract, ECe, up to 51 dS?m~ ) in southern Alberta. Changes in soil salinity and response of groundwater and soil water to imposed treatments of irrigated non-drained, irrigated drained, non-irrigated drained and control were determined. Immediately following irriga tion, groundwater gradients generally changed from upward to downward. Upward gradients were observed in the non-irrigated treatments, except in the control treatment where downward gradi ents occurred following rainfalls of 54 mm or more. Soil matric potential at the 0.15-m depth was usually at or above field capacity (30 kPa) for all treatments. Irrigation and rainfall induced downward matric potential gradients between soil depths of 0.15 and 0.60 m. After three years, average profile ECe (0-1.2 m) of the irrigated non-drained, irrigated drained, non-irrigated drained and control treatments were 67, 60, 104 and 99% of initial levels, respectively. Corresponding sodium adsorption ratios were 79,79,131 and 120%. Desalinization in the irrigated non-drained and irrigated drained treatments is attributed to changes in groundwater and soil matric potential gradients resulting from irrigation. Minor desalinization also occurred in some years in the non-irrigated drained and control treatments and is attributed to high rainfall events. All treatments rcsalinized during the non-irrigated season, in one or more years, but the relative degree of resalinization was greatest in the irrigated non-drained treatment. Results suggest irrigation had a dominant effect in removing salt from the soil of this study and subsurface drainage had a minor effect. Control of salinity in this soil using irrigation, drainage, or both, may not be practical because upward groundwater gradients and overwinter resalinization restricted salt removal and may not be desirable because of potential off-site im pacts.
Keywords:
Résumé:
Mots-clés:
Citation: G.D. Buckland and M.J. Hendry 1992. GROUNDWATER RESPONSE AND SALT REMOVAL IN A SALINE-SEEP SOIL IN SOUTHERN ALBERTA. Canadian Agricultural Engineering 34(2):125-134.
Volume: 34
Issue: 1
Pages -
Contributor:
Date: 1992
Technical field:
Conference name:
Session name:
Other information:
Type: Text.Article
Format: PDF
Publication type:
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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