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פותח על ידי קלירמאש פתרונות בע"מ -
Exchangeable Na, Polymer, and Water Quality Effects on Water Infiltration and Soil Loss
Year:
1992
Authors :
בן-חור, מני
;
.
Volume :
6
Co-Authors:
Ben-Hur, M., Institute of Soils Water, The Volcani Center, P.O. Box 6, Bet-Dagan, 50-250, Israel
Clark, P., Department of Soil Environmental Science, University of California, Riverside, CA, 92521, United States
Letey, J., Department of Soil Environmental Science, University of California, Riverside, CA, 92521, United States
Facilitators :
From page:
311
To page:
317
(
Total pages:
7
)
Abstract:
Increasing exchangeable sodium percentage (ESP) contributes to increased soil dispersion and swelling of clay, which reduces the infiltration rate and increases runoff. Synthetic polymers are available that may decrease soil dispersion. A study was conducted to determine the effect of three polymers dissolved in water at 10 or 50 mg L concentrations and applied through a rainfall simulator on the infiltration rate, erosion, and soil migration through the layer of a soil at ESP equal to 8.5 and 30.6. The polymers were a cationic polysaccharide and two anionic polyacrylamides with different negative charge densities. The infiltration rate decreased with time and approached a final steady-state infiltration rate (FIR). The runoff water and associated sediment were captured and measured. Water coming through the soil layer and the amount of particulates contained in the water were measured. The FIR was significantly lower for the soil at ESP equal to 30.6 than at ESP equal to 8.5. There was no statistically significant effect of the polymer type or concentration on FIR. The amount of soil loss through erosion was significantly affected by the soil ESP, polymer type, and polymer concentration of the polymer application. More soil was in the runoff for the higher ESP than for the lower ESP. The polymer treatment effects on soil loss were in the following order: cationic polysaccharide > untreated > low anionic PAM > higher-charged anionic PAM. Soil loss from application of the polymer at 50 mg IT1 was significantly less than at 10 mg IT1. The amount of soil migrating through the soil layer with the percolate was significantly higher for the higher ESP soil, whereas there was no significant effect of polymer treatment on this parameter. © 1992 Taylor & Francis Group, LLC.
Note:
Related Files :
Exchangeable sodium
Infiltration
Polyacrylamide
polymer
polysaccharide
Sodicity
Soil conditioner
Soil loss
water quality
עוד תגיות
תוכן קשור
More details
DOI :
10.1080/15324989209381325
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22513
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:52
Scientific Publication
Exchangeable Na, Polymer, and Water Quality Effects on Water Infiltration and Soil Loss
6
Ben-Hur, M., Institute of Soils Water, The Volcani Center, P.O. Box 6, Bet-Dagan, 50-250, Israel
Clark, P., Department of Soil Environmental Science, University of California, Riverside, CA, 92521, United States
Letey, J., Department of Soil Environmental Science, University of California, Riverside, CA, 92521, United States
Exchangeable Na, Polymer, and Water Quality Effects on Water Infiltration and Soil Loss
Increasing exchangeable sodium percentage (ESP) contributes to increased soil dispersion and swelling of clay, which reduces the infiltration rate and increases runoff. Synthetic polymers are available that may decrease soil dispersion. A study was conducted to determine the effect of three polymers dissolved in water at 10 or 50 mg L concentrations and applied through a rainfall simulator on the infiltration rate, erosion, and soil migration through the layer of a soil at ESP equal to 8.5 and 30.6. The polymers were a cationic polysaccharide and two anionic polyacrylamides with different negative charge densities. The infiltration rate decreased with time and approached a final steady-state infiltration rate (FIR). The runoff water and associated sediment were captured and measured. Water coming through the soil layer and the amount of particulates contained in the water were measured. The FIR was significantly lower for the soil at ESP equal to 30.6 than at ESP equal to 8.5. There was no statistically significant effect of the polymer type or concentration on FIR. The amount of soil loss through erosion was significantly affected by the soil ESP, polymer type, and polymer concentration of the polymer application. More soil was in the runoff for the higher ESP than for the lower ESP. The polymer treatment effects on soil loss were in the following order: cationic polysaccharide > untreated > low anionic PAM > higher-charged anionic PAM. Soil loss from application of the polymer at 50 mg IT1 was significantly less than at 10 mg IT1. The amount of soil migrating through the soil layer with the percolate was significantly higher for the higher ESP soil, whereas there was no significant effect of polymer treatment on this parameter. © 1992 Taylor & Francis Group, LLC.
Scientific Publication
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