The Potential Role of Urban Forests in Removing Nutrients from Stormwater

Journal of Environmental Quality
E C DenmanG M Moore

Abstract

Biofiltration systems can be used to improve the quality of stormwater by treating runoff using plants grown in a moderately permeable soil. Most biofilters use herbaceous species, but in highly urbanized locations, such as streets, trees may be a more suitable vegetation. Biofilters that use urban woody vegetation are less studied. This experiment investigated the use of four street tree species [ Schauer, (R. Br.) Peter G. Wilson & J.T. Waterh., (Sm.) Colvill ex Sweet, and L.] and an unplanted control in model biofilters. All four tree species are used in urban landscapes in southern Australia and were chosen to investigate potential species differences in biofiltration systems. The trees were grown in mesocosms as a randomized block factorial design in soils with three saturated hydraulic conductivity rates (4, 95, and 170 mm h). The trees were regularly flooded with mains water (tap water) or artificial stormwater. Tree growth and nutrient removal performance of the systems were investigated over 13 mo. All four species grew well in all three soils, including one chosen for its low, and potentially growth-limiting, drainage rate. Tree growth increased significantly, except for , when flooded with stormwater. Unplanted contr...Continue Reading

References

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Apr 25, 2006·Water Environment Research : a Research Publication of the Water Environment Federation·Allen P DavisChristie Minami
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Oct 3, 2012·PloS One·Christopher J WalshMatthew J Burns
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May 9, 2014·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Bonnie J GlaisterBelinda E Hatt

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Citations

Jun 1, 2017·Landscape and Urban Planning·Adam BerlandMatthew E Hopton
Aug 2, 2017·Environmental Science & Technology·Benjamin D JankeSarah E Hobbie

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