Lake Chivero Heavily Polluted: Research

Lake Chivero Heavily Polluted: Research
Published: 05 March 2012 (9364 Views)
Research carried by the University of Zimbabwe on the levels of Lake Chivero pollution has revealed that the lake and all its subsidiary rivers are subject to stress from heavy pollution of metals, pesticides and raw sewage which require a huge financial commitment to rehabilitate the lake for the benefit of water users.

Serious cases of pollution have been detected from water samples taken from the Manyame and Hunyani rivers as well as Lake Chivero.

According to the research, Lake Chivero is highly eutrophic and levels of nutrients in the water are now very high because of raw effluent, domestic and industrial waste being discharged into it, resulting in blue-green algae blooms and water hyacinth.

University of Zimbabwe Department of Biology lecturer and researcher, Dr Maxwell Barson said accumulation of ammonia and inorganic pollutants among other chemicals have become much higher than before in the lake, adding that such nutrients become more concentrated during periods of droughts when water levels are low.

"We have not yet ascertained if the overall levels of weed growth nutrients such as phosphates, nitrates, potassium and sewage effluent are still within acceptable limits according to World Health Organisation (WHO) standards for drinking water and Zimbabwe waste effluent standards," said Dr Barson.

Dr Barson said the Lake Chivero pollution could be reduced by strict enforcement of trade and waste effluent regulations and by imposition of stiff penalties to those who do not comply.


He also said as a way forward, authorities can use the integrated lake basin management to rehabilitate the lake or divert sewage effluent somewhere else away from Lake Chivero catchment area to a special dam where water could be separately treated for industrial usage or irrigation.

Lake Chivero was built in 1952 as the principal water supply for the City of Harare.

It is located downstream from the city which discharges sewage into two of its tributaries, the Mukuvisi and Hunyani Rivers.

The growth of Harare's population has not been matched by infrastructure expansion thus exerting pressure on pipes which are regularly bursting.


- Zbc

 0

You May Like These Videos

Comments

There are no comments.

Latest stories

VACANCY: Thomson Reuters Foundation is employing

by Mandla Ndlovu | 19 April 2019 | 115 Views

Mohadi goes to court, seeks protection against ex-wife

by Staff reporter | 19 April 2019 | 156 Views

Gukurahundi cannot be wished away: Williams

by Staff reporter | 19 April 2019 | 108 Views

ZANU PF MP and Zhuwawo agree with Chamisa

by Mandla Ndlovu | 19 April 2019 | 233 Views

Can Zimbabwe manage to de-dollarise?

by Victor Bhoroma | 19 April 2019 | 96 Views

Why Mthuli Ncube's new currency is likely to be doomed

by Martin Tarusenga | 19 April 2019 | 90 Views

Rebirth of the Zimdollar

by Paddington Masamha | 19 April 2019 | 105 Views

Gukurahundi healing, reconciliation timeframes set

by Staff reporter | 19 April 2019 | 84 Views

Angry Mnangagwa lashes 'unpatriotic and inhumane' forces

by Staff reporter | 19 April 2019 | 85 Views

India, UAE roped in to revive CAPS, Datlabs

by Staff reporter | 19 April 2019 | 72 Views

Zimbabwe civil servants demand fresh wage negotiations

by Staff reporter | 19 April 2019 | 72 Views

Police, courts corrupt, says Mnangagwa

by Staff reporter | 19 April 2019 | 74 Views

Welshman Ncube not presidential material, MDC structures

by Staff reporter | 19 April 2019 | 76 Views

'39 years on Matebeleland still lags behind'

by Staff reporter | 19 April 2019 | 74 Views

Mnangagwa, Mugabe carefully planned Gukurahundi genocide

by Staff reporter | 19 April 2019 | 74 Views

Mnangagwa's fear over Gukurahundi

by Staff reporter | 19 April 2019 | 77 Views

Mnangagwa to launch Command Bakeries across the country

by Staff reporter | 19 April 2019 | 73 Views

Fake projects scandal: MP Musikavanhu plots to steal CDF

by Staff reporter | 19 April 2019 | 87 Views

Zanu-PF youths in solidarity march

by Staff reporter | 19 April 2019 | 90 Views

Rigging, vote-buying alleged at MDC Alliance provincial congress

by Staff reporter | 19 April 2019 | 78 Views

Judge blasts State over Chivayo appeal

by Staff reporter | 19 April 2019 | 82 Views

Zimbabweans told to brace for thunderstorms, wet Easter

by Staff reporter | 19 April 2019 | 92 Views

Zimbabwe will rise again, dreams Mnangagwa

by Staff reporter | 19 April 2019 | 74 Views

Fire leaves Guinea Fowl High teachers homeless

by Staff reporter | 19 April 2019 | 79 Views

Bulawayo man found dead

by Staff reporter | 19 April 2019 | 71 Views

Mnangagwa's minister speaks on Gukurahundi, past conflicts

by Staff reporter | 19 April 2019 | 66 Views

Law student appeals for US$5 000 for medical bills

by Staff reporter | 19 April 2019 | 38 Views

Bulawayo residents resist cemeteries solar projects

by Staff reporter | 19 April 2019 | 68 Views

Death enroute to funeral

by Staff reporter | 19 April 2019 | 81 Views

Highlanders pummel Dembare Uhuru Cup

by Staff reporter | 19 April 2019 | 88 Views

Baby choked to death by maize grains

by Staff reporter | 19 April 2019 | 68 Views

Lupane East MP declared provincial heroine

by Staff reporter | 19 April 2019 | 73 Views

Zimbabwe trade deficit drops by 90%

by Staff reporter | 19 April 2019 | 66 Views

RTG shells out $2,5m on Bulawayo hotel rehab

by Staff reporter | 19 April 2019 | 61 Views

Beitbridge on massive expansion drive

by Staff reporter | 19 April 2019 | 61 Views

Council to oppose MDC by-election challenge

by Staff reporter | 19 April 2019 | 26 Views

Zanu-PF factional fights spill into court

by Staff reporter | 19 April 2019 | 34 Views