Lake Chivero Heavily Polluted: Research

Lake Chivero Heavily Polluted: Research
Published: 05 March 2012 (9264 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

Army rescues St Charles Lwanga students

by Staff reporter | 18 March 2019 | 92 Views

Government assures the nation on adequate grain in silos

by Simbarashe Sithole | 18 March 2019 | 83 Views

Linda Masarira speaks on deadly Cyclone Idai

by Mandla Ndlovu | 18 March 2019 | 102 Views

5 important parts of a blog post

by Jeremy Biberdorf | 18 March 2019 | 84 Views

Man drowns in bathtub

by Staff reporter | 18 March 2019 | 99 Views

Mthuli Ncube avails $50 Million to deal with Cyclone Idai

by Mandla Ndlovu | 18 March 2019 | 88 Views

PHOTO: Chiwenga back in good health

by Mandla Ndlovu | 18 March 2019 | 95 Views

Herald Editor clashes with America

by Mandla Ndlovu | 18 March 2019 | 94 Views

Death toll in Zimbabwe rises to 98

by Mandla Ndlovu | 18 March 2019 | 88 Views

Government responds to Kasukuwere's threats

by Mandla Ndlovu | 18 March 2019 | 145 Views

Suspected copper cable thieves electrocuted

by Staff reporter | 18 March 2019 | 104 Views

WATCH: Jubilation as Chamisa lands in Chimanimani

by Mandla Ndlovu | 18 March 2019 | 160 Views

US 2018 Human rights report on Zimbabwe biased

by Nobleman Runyanga | 18 March 2019 | 91 Views

Beyond the New my foot!

by Sam Wezhira | 18 March 2019 | 98 Views

Buyanga's AMG offers assistance to cyclone victims

by Staff reporter | 18 March 2019 | 114 Views

Joshua Nkomo's family describe Mnangagwa's govt as a 'dead donkey'

by Staff reporter | 18 March 2019 | 100 Views

High Court to decide Parirenyatwa's fate

by Staff reporter | 18 March 2019 | 84 Views

Komichi to appeal against conviction

by Staff reporter | 18 March 2019 | 79 Views

Mugabe's ex-deputy minister's house auctioned off

by Staff reporter | 18 March 2019 | 98 Views

Kasukuwere threatens, Zanu-PF ruffled

by Staff reporter | 18 March 2019 | 100 Views

'Zimbabwe embassies must issue IDs, passports'

by Staff reporter | 18 March 2019 | 69 Views

Small house challenges $50k adultery damages

by Staff reporter | 18 March 2019 | 78 Views

US 'very enthusiastic' about Mnangagwa govt

by Staff reporter | 18 March 2019 | 93 Views

President Mnangagwa a Tonga from Zambia?

by Mandla Ndlovu | 18 March 2019 | 154 Views

Bus swept away in Chimanimani

by Staff reporter | 18 March 2019 | 140 Views

Chipinge MP's wife survived by climbing a tree

by Staff reporter | 18 March 2019 | 131 Views

Zimbabweans struggle with storm floods

by Al Jazeera | 18 March 2019 | 113 Views

Jonathan Moyo recruits Kasukuwere

by Mandla Ndlovu | 18 March 2019 | 135 Views

Chamisa descends in Chimanimani as Cyclone Idai kills 82

by Mandla Ndlovu | 18 March 2019 | 102 Views

Rhodesia was 'successful' because essentially it was a province of SA

by Baffour Ankomah | 18 March 2019 | 107 Views

Army dumps Chipinge pupils?

by Mandla Ndlovu | 18 March 2019 | 98 Views

Chamisa in pole position as MDC Alliance congress beckons

by Staff reporter | 18 March 2019 | 56 Views

Mnangagwa back from UAE

by Staff reporter | 18 March 2019 | 78 Views

Mnangagwa to swear in Chidawu today

by Ndou Paul | 18 March 2019 | 80 Views