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פותח על ידי קלירמאש פתרונות בע"מ -
Salinity control in a clay soil beneath an orchard irrigated with treated waste water in the presence of a high water table: A numerical study
Year:
2015
Source of publication :
Journal of Hydrology
Authors :
ברדהן, גופלי
;
.
לאופר, אשר
;
.
לוי, גיא
;
.
רוסו, דוד
;
.
Volume :
531
Co-Authors:
Russo, D., Department of Environmental Physics and Irrigation, Agriculture Research Organization, Bet Dagan, Israel
Laufer, A., Department of Environmental Physics and Irrigation, Agriculture Research Organization, Bet Dagan, Israel
Bardhan, G., Department of Soil Chemistry, Plant Nutrition and Microbiology, Agriculture Research Organization, Bet Dagan, Israel
Levy, G.J., Department of Soil Chemistry, Plant Nutrition and Microbiology, Agriculture Research Organization, Bet Dagan, Israel
Facilitators :
From page:
198
To page:
213
(
Total pages:
16
)
Abstract:
A citrus orchard planted on a structured, clay soil associated with a high water table, irrigated by drip irrigation system using treated waste water (TWW) and local well water (LWW) was considered here. The scope of the present study was to analyze transport of mixed-ion, interacting salts in a combined vadose zone-groundwater flow system focusing on the following issues: (i) long-term effects of irrigation with TWW on the response of the flow system, identifying the main factors (. e.g., soil salinity, soil sodicity) that control these effects, and (ii) salinity control aiming at improving both crop productivity and groundwater quality. To pursue this two-fold goal, 3-D numerical simulations of field-scale flow and transport were performed for an extended period of time, considering realistic features of the soil, water table, crop, weather and irrigation, and the coupling between the flow and the transport through the dependence of the soil hydraulic functions, K(. ψ) and θ(. ψ), on soil solution concentration C, and sodium adsorption ratio, SAR. Results of the analyses suggest that in the case studied, the long-term effect of irrigation with TWW on the response of the flow system is attributed to the enhanced salinity of the TWW, and not to the increase in soil sodicity. The latter findings are attributed to: (i) the negative effect of soil salinity on water uptake, and the tradeoff between water uptake and drainage flux, and, concurrently, solute discharge below the root zone and, (ii) the tradeoff between the effects of C and SAR on K(. ψ) and θ(. ψ). Furthermore, it was demonstrated that a data-driven protocol for soil salinity control, based on alternating irrigation water quality between TWW and desalinized water, guided by the soil solution salinity at the centroid of the soil volume active in water uptake, may lead to a substantial increase in crop yield, and to a substantial decrease in the salinity load in the groundwater. © 2015 Elsevier B.V.
Note:
Related Files :
Adsorption
groundwater
irrigation
Orchards
quality control
three-dimensional flow
vadose zone
wastewater treatment
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.jhydrol.2015.04.013
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26335
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:21
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Scientific Publication
Salinity control in a clay soil beneath an orchard irrigated with treated waste water in the presence of a high water table: A numerical study
531
Russo, D., Department of Environmental Physics and Irrigation, Agriculture Research Organization, Bet Dagan, Israel
Laufer, A., Department of Environmental Physics and Irrigation, Agriculture Research Organization, Bet Dagan, Israel
Bardhan, G., Department of Soil Chemistry, Plant Nutrition and Microbiology, Agriculture Research Organization, Bet Dagan, Israel
Levy, G.J., Department of Soil Chemistry, Plant Nutrition and Microbiology, Agriculture Research Organization, Bet Dagan, Israel
Salinity control in a clay soil beneath an orchard irrigated with treated waste water in the presence of a high water table: A numerical study
A citrus orchard planted on a structured, clay soil associated with a high water table, irrigated by drip irrigation system using treated waste water (TWW) and local well water (LWW) was considered here. The scope of the present study was to analyze transport of mixed-ion, interacting salts in a combined vadose zone-groundwater flow system focusing on the following issues: (i) long-term effects of irrigation with TWW on the response of the flow system, identifying the main factors (. e.g., soil salinity, soil sodicity) that control these effects, and (ii) salinity control aiming at improving both crop productivity and groundwater quality. To pursue this two-fold goal, 3-D numerical simulations of field-scale flow and transport were performed for an extended period of time, considering realistic features of the soil, water table, crop, weather and irrigation, and the coupling between the flow and the transport through the dependence of the soil hydraulic functions, K(. ψ) and θ(. ψ), on soil solution concentration C, and sodium adsorption ratio, SAR. Results of the analyses suggest that in the case studied, the long-term effect of irrigation with TWW on the response of the flow system is attributed to the enhanced salinity of the TWW, and not to the increase in soil sodicity. The latter findings are attributed to: (i) the negative effect of soil salinity on water uptake, and the tradeoff between water uptake and drainage flux, and, concurrently, solute discharge below the root zone and, (ii) the tradeoff between the effects of C and SAR on K(. ψ) and θ(. ψ). Furthermore, it was demonstrated that a data-driven protocol for soil salinity control, based on alternating irrigation water quality between TWW and desalinized water, guided by the soil solution salinity at the centroid of the soil volume active in water uptake, may lead to a substantial increase in crop yield, and to a substantial decrease in the salinity load in the groundwater. © 2015 Elsevier B.V.
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