Skip navigation

Modeling heavy metal behaviour in sustainable drainage systems: a case study

Modeling heavy metal behaviour in sustainable drainage systems: a case study

Quinn, Ruth and Dussaillant, Alejandro (2014) Modeling heavy metal behaviour in sustainable drainage systems: a case study. CLEAN – Soil, Air, Water, 42 (2). pp. 160-168. ISSN 1863-0650 (Print), 1863-0669 (Online) (doi:https://doi.org/10.1002/clen.201300163)

Full text not available from this repository.

Abstract

A major problem of increased urbanization is the rise in pollution caused by runoff. Among alternative management strategies, the use of sustainable drainage systems (SuDS) such as rain gardens and other bioretention facilities is becoming an increasingly attractive option to reduce these problems. However, there are few tools if any available for their design considering pollutant retention. In this paper, a model which predicts the fate of heavy metals in SuDS is presented, and applied to the design of a rain garden system for a planned roundabout in Kent, UK. Preliminary design considered an upper root zone layer with organic soil and a sandy storage sub-layer each 30 cm thick, for a bioretention area of 5 and 10% the size of the contributing impervious surface. Two scenarios are examined; the accumulation and movement of metals without macropores and the possibility of groundwater contamination due to preferential flow. It is shown that levels of lead can build up in the upper layers of the system, but only constitute a health hazard (surpass UK standard of 750 mg/kg) after ten years. Simulations show that copper was successfully retained (no significant concentrations below 50 cm of rain garden soil depth). Finally given concerns of preferential flow bypassing bioretention facilities, macropore flow was examined; results indicated that due to site conditions it was not a threat to groundwater in the timeframe considered.

Item Type: Article
Additional Information: [1] Manuscript Accepted: 11 July 2013. [2] Accepted manuscript online: 23 September 2013. [3] Version of record online: 8 November 2013 [4] Issue published online: 5 February 2014. [5] Published in print: February 2014.
Uncontrolled Keywords: accumulation, bioretention facilities, dual-permeability model, rain garden
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Faculty / Department / Research Group: Faculty of Engineering & Science > Department of Engineering Science
Faculty of Engineering & Science
Last Modified: 30 Jan 2017 15:11
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/10448

Actions (login required)

View Item View Item