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| Titel |
Variability of drainage and solute leaching in heterogeneous urban vegetation environs |
| VerfasserIn |
H. Nouri, S. Beecham, A. M. Hassanli, G. Ingleton |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 17, no. 11 ; Nr. 17, no. 11 (2013-11-01), S.4339-4347 |
| Datensatznummer |
250085982
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| Publikation (Nr.) |
 copernicus.org/hess-17-4339-2013.pdf |
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| Zusammenfassung |
| Deep percolation enhancement from recycled wastewater irrigation may
contribute to salt accumulation and water table elevation that can ultimately
cause soil and ground water degradation. Variation of drainage rate and
solute leaching were investigated in an urban park containing heterogeneous
landscape plants that were irrigated with recycled wastewater. Field
monitoring was undertaken at Veale Gardens in the Adelaide Parklands,
Australia. Based on landscape variation in Veale Gardens, two landscape zones
were defined: one being largely covered with turf grasses with few trees and
shrubs (MG) with the second zone being mostly trees and shrubs with
intermittent turf grasses (MT). Experiments were performed on two
zero-tension lysimeters placed horizontally 100 cm below ground to monitor
the variation of volume and quality indicators of drained water for four
seasons. The outcomes showed a significant variation of drainage quantity and
quality in the MT and MG zones. The low vegetation cover in the MG zone
resulted in more drained water than in the high vegetation cover (MT zone).
In both zones, more drainage water was collected in winter than in other
seasons. This is in spite of the input water showing a maximum rate in
summer. The seasonal salinities measured in the two lysimeters showed very
similar trends with the lowest salinity rate in autumn with the levels
increasing through winter and spring. Chemical analyses of leachate solute
and salt loading indicated no impact from using recycled wastewater. |
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