Water quality in earthen dams and potential health impacts: case of Nadosoito Dam, Tanzania

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dc.contributor.author Eliakimu, N.
dc.contributor.author Machunda, Revocatus L.
dc.contributor.author Njau, Karoli N.
dc.date.accessioned 2019-07-03T10:44:45Z
dc.date.available 2019-07-03T10:44:45Z
dc.date.issued 2018-09-01
dc.identifier.uri https://doi.org/10.2166/wpt.2018.083
dc.identifier.uri http://dspace.nm-aist.ac.tz/handle/123456789/334
dc.description Research Article published by IWA Publishing Volume 13, Issue 3 1 September 2018 en_US
dc.description.abstract The aim of the study was to assess seasonal water quality variations in an earthen dam and their potential impact on the health of those using the water for domestic purposes. High values of chemical oxygen demand, from <0.7 to 87 mg/l, and turbidity, from 204 to 53,300 NTU, were reported. Turbidity and total suspended solids were the highest at the onset of rainfall, and generally declined from the wet to the dry season. Ammonia concentrations ranged from 0.14 to 270 mg/l and nitrate from 0.6 to 1,715 mg-N/l, and were highest towards the end of wet season, while NO2-N was highest (290 mg/l) in the dry season. There were some notably high phycocyanin (PC) pigment values (19.9 to 495 μg/l) unique to cyanobacteria, well above the WHO alert level of 30 μg/l. PC is associated with a variety of toxins affecting humans and animals. Possible sources of pollutants include animal droppings/urine and runoff from farms applying fertilisers. A further aim was to assess water treatability with a pilot inclined plate settler system for pollutants and microbial removal. The results of this study suggest that water treatment systems must be designed to take care of the worst influent water quality conditions. en_US
dc.language.iso en_US en_US
dc.publisher IWA Publishing en_US
dc.subject Earthen dam en_US
dc.subject Health impacts en_US
dc.subject Water quality en_US
dc.title Water quality in earthen dams and potential health impacts: case of Nadosoito Dam, Tanzania en_US
dc.type Article en_US

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