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Subsurface drip irrigation in gravel-filled cavities
Year:
2004
Source of publication :
Vadose Zone Journal
Authors :
Ben-Gal, Alon
;
.
Volume :
3
Co-Authors:
Ben-Gal, A., Department of Environmental Physics and Irrigation, Agricultural Research Organization, Gilat Research Center, M.P. Negev, 85280, Israel
Lazorovitch, N., The Hebrew University of Jerusalem, Department of Soil and Water Sciences, Faculty of Agriculture, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12 Rechovot 76100, Israel
Shani, U., The Hebrew University of Jerusalem, Department of Soil and Water Sciences, Faculty of Agriculture, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12 Rechovot 76100, Israel
Facilitators :
From page:
1407
To page:
1413
(
Total pages:
7
)
Abstract:
Subsurface drip irrigation (SDI) is regularly used to provide water and nutrients to plants while maintaining a dry soil surface. Problems associated with the practice of SDI are spatially dependent reductions in dripper discharge and possible surfacing of water resulting from positive pressure at the emitter-soil interface. These can be resolved either through prudent care in matching dripper flow rates to soil hydraulic properties or by otherwise providing conditions under which positive pressure cannot arise. We present a method where water is applied to the soil within a gravel-filled cavity. The necessary volume of gravel is determined by the contact area between the cavity and the soil and is a function of irrigation rates, dripper spacing, and soil hydraulic proper- ties. A theoretical solution for the radius of a gravel-filled cavity based on the perimeter of the saturated zone from a line source in the soil demonstrates that larger cavities are needed as soil hydraulic conductivity decreases. The method was tested using a numeric simulation model (HYDRUS-2D) and was used and tested in a vineyard of table grapes (Vitis Vinifera L. cv. Sugraone) in a 7-yr study with SDI and gravel-trenched subsurface application of effluent and fertilizers. © Soil Science Society of America.
Note:
Related Files :
computer simulation
Saturated zone
Soil hydraulic properties
Soils
Subirrigation
subsurface drip irrigation
Theoretical solutions
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
20061
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:33
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Scientific Publication
Subsurface drip irrigation in gravel-filled cavities
3
Ben-Gal, A., Department of Environmental Physics and Irrigation, Agricultural Research Organization, Gilat Research Center, M.P. Negev, 85280, Israel
Lazorovitch, N., The Hebrew University of Jerusalem, Department of Soil and Water Sciences, Faculty of Agriculture, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12 Rechovot 76100, Israel
Shani, U., The Hebrew University of Jerusalem, Department of Soil and Water Sciences, Faculty of Agriculture, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, P.O. Box 12 Rechovot 76100, Israel
Subsurface drip irrigation in gravel-filled cavities
Subsurface drip irrigation (SDI) is regularly used to provide water and nutrients to plants while maintaining a dry soil surface. Problems associated with the practice of SDI are spatially dependent reductions in dripper discharge and possible surfacing of water resulting from positive pressure at the emitter-soil interface. These can be resolved either through prudent care in matching dripper flow rates to soil hydraulic properties or by otherwise providing conditions under which positive pressure cannot arise. We present a method where water is applied to the soil within a gravel-filled cavity. The necessary volume of gravel is determined by the contact area between the cavity and the soil and is a function of irrigation rates, dripper spacing, and soil hydraulic proper- ties. A theoretical solution for the radius of a gravel-filled cavity based on the perimeter of the saturated zone from a line source in the soil demonstrates that larger cavities are needed as soil hydraulic conductivity decreases. The method was tested using a numeric simulation model (HYDRUS-2D) and was used and tested in a vineyard of table grapes (Vitis Vinifera L. cv. Sugraone) in a 7-yr study with SDI and gravel-trenched subsurface application of effluent and fertilizers. © Soil Science Society of America.
Scientific Publication
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