Chapter

Balanced Urban Development: Options and Strategies for Liveable Cities

Volume 72 of the series Water Science and Technology Library pp 85-107

Open Access This content is freely available online to anyone, anywhere at any time.

Date:

Decontamination of Urban Run-Off: Importance and Methods

Abstract

The removal of contaminants from urban run-off waters is vital to preserving the health of urban communities that live in contact with and around the receiving waters. The apparatus developed is a Stormwater Screening and Filtration Unit (SSFU), which embodies a series of processes for the removal and retention of trash and litter, sediment, suspended solids, emulsified hydrocarbons, dissolved nutrients (both Total Nitrogen and Total Phosphorus), heavy metals and other chemicals as required by the run-off water composition and the receiving water quality of a specific catchment.

In addition to a small foot print and negligible installation time, the implementation of an SSFU as the sole method of contaminant removal from runoff, can reduce capital expenditure often by more than 60 % and reduce on-going service cost by over 80 %, when compared to the implementation of conventional multiple treatment measures in a treatment train as a means of meeting pollution reduce targets.

The SSFU is available to integrate with various applications, ranging from in-line drainage lines, as a pre-process within on-site detention (OSD), discharge outlets to wetlands or receiving waters and with the addition of passive secondary media can remove even fine silts and chemicals prior to harvesting and aquifer re-charge.

Keywords

On-site detention Stormwater screening Filtration Runoff Wetlands Contaminants