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פותח על ידי קלירמאש פתרונות בע"מ -
Wetting rate and sodicity effects on interrill erosion from semi-arid Israeli soils
Year:
2002
Source of publication :
Soil and Tillage Research
Authors :
לוי, גיא
;
.
ממדוב, אמרח
;
.
שיינברג, יצחק
;
.
Volume :
68
Co-Authors:
Mamedov, A.I., Inst. of Soil, Water/Environ. Sci., Agric. Research Organization (ARO), Volcani Center, P.O. Box 6, Bet-Dagan 50-250, Israel
Shainberg, I., Inst. of Soil, Water/Environ. Sci., Agric. Research Organization (ARO), Volcani Center, P.O. Box 6, Bet-Dagan 50-250, Israel
Levy, G.J., Inst. of Soil, Water/Environ. Sci., Agric. Research Organization (ARO), Volcani Center, P.O. Box 6, Bet-Dagan 50-250, Israel
Facilitators :
From page:
121
To page:
132
(
Total pages:
12
)
Abstract:
Interrill erosion depends on soil detachment and sediment transport, which are affected by seal formation and runoff. The objective of this study was to investigate the effect of wetting rate (WR) on runoff and soil erosion in semi-arid Israeli soils varying in clay content and exchangeable sodium percentage (ESP). Six soils, ranging in clay content between 90 and 680 g kg-1 and ESP between 0.9 and 20, were packed in 0.2 m × 0.4 m trays, wetted at 3 WRs (2, 8, or 64 mm h-1), and thereafter exposed to 60 mm of distilled water rain in a laboratory rainfall simulator. Under non-sodic conditions (ESP < 2), highest runoff and erosion were obtained from loam (220 g kg-1 clay and 350 g kg-1 silt) which was ascribed to its high susceptibility to seal formation, runoff and detachability. Runoff and erosion increased with an increase in ESP and WR. The effect of WR on runoff and erosion was negligible in loamy sand and generally increased with an increase in clay content. In clay soils (>600 g kg-1 clay), WR played a greater role in determining runoff and erosion compared with raindrop impact. A linear type dependence existed between erosion and runoff for soils with ESP < 5 or when slow WR was used. For high ESP soils, or when medium or fast WR were used, an exponential type relation described better the dependence of erosion on runoff. It is suggested that for sodic soils or for conditions favoring aggregate slaking, runoff level and its velocity were high enough to initiate rill erosion that supplemented raindrop detachment in markedly increasing erosion. © 2002 Elsevier Science B.V. All rights reserved.
Note:
Related Files :
Aggregate breakdown
Clay content
Israel
Phocidae
rill
runoff
Semi-arid soils
semiarid region
soil erosion
Soil loss
Wetting
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/S0167-1987(02)00115-0
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23239
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:57
Scientific Publication
Wetting rate and sodicity effects on interrill erosion from semi-arid Israeli soils
68
Mamedov, A.I., Inst. of Soil, Water/Environ. Sci., Agric. Research Organization (ARO), Volcani Center, P.O. Box 6, Bet-Dagan 50-250, Israel
Shainberg, I., Inst. of Soil, Water/Environ. Sci., Agric. Research Organization (ARO), Volcani Center, P.O. Box 6, Bet-Dagan 50-250, Israel
Levy, G.J., Inst. of Soil, Water/Environ. Sci., Agric. Research Organization (ARO), Volcani Center, P.O. Box 6, Bet-Dagan 50-250, Israel
Wetting rate and sodicity effects on interrill erosion from semi-arid Israeli soils
Interrill erosion depends on soil detachment and sediment transport, which are affected by seal formation and runoff. The objective of this study was to investigate the effect of wetting rate (WR) on runoff and soil erosion in semi-arid Israeli soils varying in clay content and exchangeable sodium percentage (ESP). Six soils, ranging in clay content between 90 and 680 g kg-1 and ESP between 0.9 and 20, were packed in 0.2 m × 0.4 m trays, wetted at 3 WRs (2, 8, or 64 mm h-1), and thereafter exposed to 60 mm of distilled water rain in a laboratory rainfall simulator. Under non-sodic conditions (ESP < 2), highest runoff and erosion were obtained from loam (220 g kg-1 clay and 350 g kg-1 silt) which was ascribed to its high susceptibility to seal formation, runoff and detachability. Runoff and erosion increased with an increase in ESP and WR. The effect of WR on runoff and erosion was negligible in loamy sand and generally increased with an increase in clay content. In clay soils (>600 g kg-1 clay), WR played a greater role in determining runoff and erosion compared with raindrop impact. A linear type dependence existed between erosion and runoff for soils with ESP < 5 or when slow WR was used. For high ESP soils, or when medium or fast WR were used, an exponential type relation described better the dependence of erosion on runoff. It is suggested that for sodic soils or for conditions favoring aggregate slaking, runoff level and its velocity were high enough to initiate rill erosion that supplemented raindrop detachment in markedly increasing erosion. © 2002 Elsevier Science B.V. All rights reserved.
Scientific Publication
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