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קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Irrigation with effluents: Effects of prewetting rate and clay content on runoff and soil loss
Year:
2001
Source of publication :
Journal of Environmental Quality
Authors :
לוי, גיא
;
.
שיינברג, יצחק
;
.
Volume :
30
Co-Authors:

Mamedov, A.I., Inst. of Soil, Water/Environ. Sci., Agricul. Res. Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Shainberg, I., Inst. of Soil, Water/Environ. Sci., Agricul. Res. Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Levy, G.J., Inst. of Soil, Water/Environ. Sci., Agricul. Res. Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel

Facilitators :
From page:
2149
To page:
2156
(
Total pages:
8
)
Abstract:
Stability of soil surface aggregates and irrigation water quality significantly affect runoff and soil erosion. Slow wetting of aggregates prevents slaking. We hypothesized that wetting rate will affect a soil's susceptibility to seal formation and soil erosion, and that this susceptibility will differ between effluent- and fresh water (FW)-irrigated soils. Effects of prewetting rate (2, 4, 8, and 64 mm h-1) on runoff and interrill erosion from five Israeli soils exposed to 60 mm of simulated rain were studied in the laboratory. Soils were taken from fields irrigated with FW or effluents for >15 yr. In general, for effluentand FW-irrigated samples, runoff and soil loss were greatest for the soil with 22.5% clay; at lower or higher clay contents, less runoff and soil losses were noted. Runoff and soil loss decreased with decreasing prewetting rate (PWR) mainly in soils with clay content ≥38%. Total runoff and soil loss were higher in effluent-irrigated soils than in FW-irrigated ones in the loamy sand (8% clay) only. Greater soil losses occurred from effluent-irrigated soils exposed to fast PWR (64 m h-1) compared with FW-irrigated soils. In general, PWR had similar effects on total runoff and soil loss for effluent- and FW-irrigated soils. Use of wetting rates ≤8 mm h-1 to prevent aggregate slaking decreased runoff and soil loss from loam and clayey soils exposed to simulated rainfall of high kinetic energy (15.9 kJ m-3). Long term irrigation with effluents in soils containing >20% clay did not seem to adversely affect soil susceptibility to runoff and soil loss in soils exposed to simulated rainfall, beyond that observed in FW-irrigated soils.
Note:
Related Files :
Agriculture
irrigation
rain
runoff
soil
Soils
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21424
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:44
Scientific Publication
Irrigation with effluents: Effects of prewetting rate and clay content on runoff and soil loss
30

Mamedov, A.I., Inst. of Soil, Water/Environ. Sci., Agricul. Res. Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Shainberg, I., Inst. of Soil, Water/Environ. Sci., Agricul. Res. Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Levy, G.J., Inst. of Soil, Water/Environ. Sci., Agricul. Res. Organization (ARO), Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel

Irrigation with effluents: Effects of prewetting rate and clay content on runoff and soil loss
Stability of soil surface aggregates and irrigation water quality significantly affect runoff and soil erosion. Slow wetting of aggregates prevents slaking. We hypothesized that wetting rate will affect a soil's susceptibility to seal formation and soil erosion, and that this susceptibility will differ between effluent- and fresh water (FW)-irrigated soils. Effects of prewetting rate (2, 4, 8, and 64 mm h-1) on runoff and interrill erosion from five Israeli soils exposed to 60 mm of simulated rain were studied in the laboratory. Soils were taken from fields irrigated with FW or effluents for >15 yr. In general, for effluentand FW-irrigated samples, runoff and soil loss were greatest for the soil with 22.5% clay; at lower or higher clay contents, less runoff and soil losses were noted. Runoff and soil loss decreased with decreasing prewetting rate (PWR) mainly in soils with clay content ≥38%. Total runoff and soil loss were higher in effluent-irrigated soils than in FW-irrigated ones in the loamy sand (8% clay) only. Greater soil losses occurred from effluent-irrigated soils exposed to fast PWR (64 m h-1) compared with FW-irrigated soils. In general, PWR had similar effects on total runoff and soil loss for effluent- and FW-irrigated soils. Use of wetting rates ≤8 mm h-1 to prevent aggregate slaking decreased runoff and soil loss from loam and clayey soils exposed to simulated rainfall of high kinetic energy (15.9 kJ m-3). Long term irrigation with effluents in soils containing >20% clay did not seem to adversely affect soil susceptibility to runoff and soil loss in soils exposed to simulated rainfall, beyond that observed in FW-irrigated soils.
Scientific Publication
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