title: Performance characterisation of a stormwater treatment bioretention basin.
abstract: Treatment performance of bioretention basins closely depends on hydrologic and hydraulic factors such as rainfall characteristics and inflow and outflow discharges. An in-depth understanding of the influence of these factors on water quality treatment performance can provide important guidance for effective bioretention basin design. In this paper, hydraulic and hydrologic factors impacting pollutant removal by a bioretention basin were assessed under field conditions. Outcomes of the study confirmed that the antecedent dry period plays an important role in influencing treatment performance. A relatively long antecedent dry period reduces nitrite and ammonium concentrations while increasing the nitrate concentration, which confirms that nitrification occurs within the bioretention basin. Additionally, pollutant leaching influences bioretention basin treatment performance, reducing the nutrients removal efficiency, which was lower for high rainfall events. These outcomes will contribute to a greater understanding of the treatment performance of bioretention basins, assisting in the design, operation and maintenance of these systems.
authors.affiliation: Department of Civil Engineering, Faculty of Engineering, Sam Ratulangi University, Manado, Indonesia.
authors.forename: Isri R
authors.initials: IR
authors.lastname: Mangangka
authors.affiliation: Research Centre of Environmental Engineering and Management, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China; Cooperative Research and Education Center for Environmental Technology, Kyoto University-Tsinghua University, Shenzhen 518055, People's Republic of China. Electronic address: liu.an@sz.tsinghua.edu.cn.
authors.forename: An
authors.initials: A
authors.lastname: Liu
authors.affiliation: Science and Engineering Faculty, Queensland University of Technology, P.O. Box 2434, Brisbane, Qld 4001, Australia.
authors.forename: Prasanna
authors.initials: P
authors.lastname: Egodawatta
authors.affiliation: Science and Engineering Faculty, Queensland University of Technology, P.O. Box 2434, Brisbane, Qld 4001, Australia.
authors.forename: Ashantha
authors.initials: A
authors.lastname: Goonetilleke
mesh_terms: D003247:Conservation of Natural Resources; D006801:Humans; D062070:Hydrology / Q000379:methods*; D011891:Rain; D014872:Water Movements; D018508:Water Purification
keywords: Bioretention basin; Rainfall characteristics; Stormwater pollutant processes; Stormwater quality; Stormwater treatment