#WaterWatch

Civil engineer devises plan to use stormwater in Cape Town

About 300 million cubic metres of water used in Cape Town annually is derived from the city's six major reservoirs.

But every year four times as much as that falls on the city as rain. Now civil engineer and PhD researcher John Okedi is studying ways in which this water can be used to offset the current water shortage.

Okedi explains that conventional treatment of stormwater involves pushing the water from the pipes and is later discharged into the sea.

To effectively store the water, Okedi suggests exploiting some of the approximately 800 retention ponds in Cape Town that are usually empty until required for flood management.

Why not convert the stormwater ponds into reservoirs?

John Okedi PhD Researcher at University of Cape Town’s Southern Africa Labour and Development Research Unit

It is possible to use some of the 60 ponds in the Lotus River catchment for longer term storage while still being available, through pre-emptive discharge prior to major storms, to control flooding.

John Okedi PhD Researcher at University of Cape Town’s Southern Africa Labour and Development Research Unit

Listen to audio clip for more:

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