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Temporal, horizontal and vertical variability of water chemistry in unsaturated zone of fine-grain soil. Research technical completion report, project A-021-IDA Item Info

A method was developed for extracting water samples from unsaturated soils under low moisture content and concomitant high tension. A sample collection cell was constructed by enclosing a hydrophylic, cross-linked, dextran xerogel in seamless dialyzer tubing with opening diameters of 48 angstroms. When the cell is placed in contact with a soil, water and its dissolved ions move through the membrane and into the hydrophylic substance. Because the ion exchange capacity of the xerogel is negligible, the water and ions can be replaced by distilled, deionized water and the effluent analyzed. However, chemical analysis of the effluent has revealed that results are not reproducible and that unreasonably high concentrations of some ions often result. Combination trace and infiltration tests have demonstrated that water moves through the loess soils of northern Idaho via discontinuities as well as through intergranual pore spaces. Whether the discontinuities are operative in the infiltration process depends on the surface condition and on the application rate. These must permit a saturated layer to form above the discontinuities before they can begin to conduct water preferentially.

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Title:
Temporal, horizontal and vertical variability of water chemistry in unsaturated zone of fine-grain soil. Research technical completion report, project A-021-IDA
Authors:
Williams, Roy E.
Date Created (ISO Standard):
1969-06
Description:
A method was developed for extracting water samples from unsaturated soils under low moisture content and concomitant high tension. A sample collection cell was constructed by enclosing a hydrophylic, cross-linked, dextran xerogel in seamless dialyzer tubing with opening diameters of 48 angstroms. When the cell is placed in contact with a soil, water and its dissolved ions move through the membrane and into the hydrophylic substance. Because the ion exchange capacity of the xerogel is negligible, the water and ions can be replaced by distilled, deionized water and the effluent analyzed. However, chemical analysis of the effluent has revealed that results are not reproducible and that unreasonably high concentrations of some ions often result. Combination trace and infiltration tests have demonstrated that water moves through the loess soils of northern Idaho via discontinuities as well as through intergranual pore spaces. Whether the discontinuities are operative in the infiltration process depends on the surface condition and on the application rate. These must permit a saturated layer to form above the discontinuities before they can begin to conduct water preferentially.
Subjects:
water filtration
Collection:
Boise Basin
Series:
Water for Idaho
IWRRI number:
196922
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Preferred Citation:
"Temporal, horizontal and vertical variability of water chemistry in unsaturated zone of fine-grain soil. Research technical completion report, project A-021-IDA", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-196922.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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