Urban stormwater treatment by a constructed wetland: Seasonality impacts on hydraulic efficiency, physico-chemical behavior and heavy metal occurrence

The Science of the Total Environment
M WalaszekAdrien Wanko

Abstract

Urban stormwater affects the general quality of water bodies because of their hydraulic and pollution impacts. Stormwater discharges modify stream water flow and are reported as major source of heavy metals (HMs) in urban streams. Stormwater Constructed Wetlands (SCWs) have been built worldwide to manage stormwater before it is released into hydrosystems. In SCWs, stormwater is stored, evaporated and sometimes infiltrated. Subsequently, the HMs in stormwater can be settled, filtered and bioassimilated by microorganisms. Hence, the efficiency of SCWs in managing stormwater depends on climatic conditions, which change with season. The aim of this study was to investigate the impacts of seasonality on the performance of a 6-year-old constructed wetland made with a pond followed by a vertical flow filter. Hydraulic performance of, physico-chemical behaviour of, and HM mitigation via the SCW were evaluated using over 3 years of monitoring (2015-2017) data. Only 35% of the rain events that occurred in the studied catchment caused a discharge into the pond and 17% into the filter. The SCW was mostly supplied with stormwater in spring and summer and provided peak flow attenuation from 97 to 100% in all seasons. Variations in physico-ch...Continue Reading

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Citations

Jun 28, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Carolyn M RodakJason R Vogel
Aug 20, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Qiyu LianDaniel Dianchen Gang
Sep 19, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Umesh GhimireVeera Gnaneswar Gude
Apr 20, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Rui ZhangFei Qi
Oct 7, 2019·Environmental Science and Pollution Research International·Vikas PandeyVipin Kumar
Nov 6, 2018·Environmental Science and Pollution Research International·Hongxiang ChaiQiang He
Apr 17, 2019·Environmental Science and Pollution Research International·Yongchao ZhouYiping Zhang
Jun 29, 2021·Journal of Environmental Management·Paul BoisAdrien Wanko
Aug 10, 2021·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Kun ChengGenxing Pan
Dec 11, 2021·The Science of the Total Environment·Ian M SimpsonMichael R Brooker

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