Hydrogeochemical characteristics and spatial distribution of groundwater quality in Arusha well fields, Northern Tanzania

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dc.contributor.author Chacha, Nyamboge
dc.contributor.author Njau, Karoli N.
dc.contributor.author Lugomela, George V.
dc.contributor.author Muzuka, Alfred N. N.
dc.date.accessioned 2019-07-22T11:10:01Z
dc.date.available 2019-07-22T11:10:01Z
dc.date.issued 2018-07-09
dc.identifier.uri https://doi.org/10.1007/s13201-018-0760-4
dc.identifier.uri https://dspace.nm-aist.ac.tz/handle/123456789/364
dc.description Research Article published by Springer en_US
dc.description.abstract Arusha aquifers have been exploited intensively serving as the main source of domestic water supply in the city. But the quality of groundwater is not clearly documented for future planning and management. Hydrogeochemical assessment was carried out to establish groundwater quality and its spatial distribution with the aid of geostatistical techniques. Groundwater samples were collected and analyzed for major cations and anions using conventional methods of water analysis. Well lithology and geological map were considered for hydrogeological interpretation of the area. The results of piper diagram revealed Na–K–HCO3 water type with sodium and bicarbonate ions dominating in all samples. High fluoride concentrations and general groundwater chemistry are mainly controlled by aquifer lithology than anthropogenic activities. The levels of anthropogenic pollution indicators such as nitrate, chloride and sulfate in deep wells are generally low and most likely coming from natural sources. The geological sections indicate two potential aquifers (volcanic sediment and weathered/ fractured formation) both yield water containing significant concentration of fluoride. Fluoride concentrations were higher than WHO guidelines (1.5 mg/l) and Tanzanian standards (4.0 mg/l) by 82 and 36% of the analyzed groundwater samples, respectively. The southern part of the study area yields groundwater of better quality for human consumption than northern zones which is at high elevation on the foot of Mt. Meru. With exception of fluoride, the quality of groundwater in the study area is generally suitable for drinking purpose and other socioeconomic uses. en_US
dc.language.iso en_US en_US
dc.publisher Springer en_US
dc.subject Groundwater quality en_US
dc.subject Hydrogeochemical en_US
dc.title Hydrogeochemical characteristics and spatial distribution of groundwater quality in Arusha well fields, Northern Tanzania en_US
dc.type Article en_US

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