The removal of urban litter from stormwater conduits and streams: Paper 3 - Selecting the most suitable trap

Armitage N. ; Rooseboom A. (2000)


A large quantity of urban litter is finding its way into the drainage systems to become an eyesore and a potential health hazard. Many of the traps currently installed are, however, extremely ineffective at trapping and storing urban litter. An extensive review of some 50 designs indicated that only seven showed much promise for South African conditions, although one or two other designs may be suitable for specialised installations. This paper describes the seven most promising options and recommends a trap selection procedure. A preliminary assessment of the seven most promising trapping structures concludes that three designs - two utilising declined self-cleaning screens and the other utilising suspended screens in tandem with a hydraulically actuated sluice gate - are likely to be the optimal choice in the majority of urban drainage situations in South Africa.

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