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Type of publication: research article
Type of publication (PDB): Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Bastienė, Nijolė;Govsha, Elena
Title: An assessment of controlled drainage efficiency in sandy loam soils
Is part of: Rural development 2011 : 5th international scientific conference, 24-25 November, 2011, Akademija : proceedings. Akademija : Aleksandras Stulginskis University, Vol. 5, b. 2 (2011)
Extent: p. 267-273
Date: 2011
Keywords: Controlled drainage;Groundwater table management;Drainage water quality;Inorganic nitrogen
Abstract: Field studies on the effectiveness of controlled drainage in sandy loam soil were carried out in the Lowland of Middle Lithuania. The plot, which has existing subsurface water removal systems operated as conventional drainage was readjusted for groundwater table management. A water level control structure was installed and two separate systems - free drainage (FD) and controlled drainage (CD) were arranged. The groundwater table level was allowed to rise to a maximum of 68 cm above the drains. Measurements to record groundwater table depth, drain outflow quantity and quality were performed through the period 2000-2007. It was determined that in the CD system annual drainage outflow lasted shorter by 40-62%, at the same time it was reduced by 25% and nitrate leaching – by 20-28% lower in comparison with drainage operating in an ordinary regime. These quantities varied depending on weather conditions. Groundwater table control in single-acting drainage system is feasible and has positive hydrological and environmental impact
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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