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Throughfall Chemistry and Canopy Interactions in Urban and Suburban Coniferous Stands

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Author(s): Jūratė Žaltauskaitė | Romualdas Juknys

Journal: Environmental Research, Engineering and Management
ISSN 1392-1649

Volume: 50;
Issue: 4;
Start page: 6;
Date: 2009;
Original page

Keywords: dry deposition | leaching | net throughfall | throughfall | uptake | urban-suburban

ABSTRACT
The research into atmospheric deposition by means of throughfall estimates were carried out in 2001-2004 in urban and suburban coniferous stands. Collection of bulk and throughfall deposition was performed on a monthly basis from April to November. The basic aim of the study was to investigate dry deposition contribution to total deposition at coniferous stands differently exposed to local pollution source. Bulk and throughfall deposition of anions in suburbs exceeded that in an urban site. Our results show that dry deposition is the main reason leading to enrichment of throughfall in ions of anthropogenic provenance (SO42-, NO3-, Cl- and NH4+). Regression analysis has revealed that the forest situated in the suburbs in the direction of the prevailing winds receive higher amounts of dry sulphur and nitrogen deposition than the forests growing in the city territories. It has been established that retained bigger amounts of anions deposition lead to the higher loss of base cations, especially of potassium.

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