Sokoine University of Agriculture

Groundwater vulnerability to petroleum hydrocarbons pollution of quaternary sand aquifer in Dar es Salaam, Tanzania

Show simple item record Mjemah, I. C. Mato, R.R.A.M. Thunvik, R. 2023-01-18T09:24:42Z 2023-01-18T09:24:42Z 2010
dc.description Journa article en_US
dc.description.abstract Groundwater is inherently susceptible to contamination from anthropogenic activities and remediation is very expensive and often impractical. Prevention of contamination is hence critical in effective groundwater management. In this paper, an attempt has been made to assess the aquifer’s vulnerability to petroleum hydrocarbons contamination in Dar es Salaam City, Tanzania. Potential benefit from mapping vulnerability is that it aids in the prioritisation of monitoring boreholes located in high vulnerable area, as well as providing bases for developing appropriate groundwater protection strategies. The DRASTIC model coupled to ArcView-GIS and HSSM model were used in vulnerability assessment. The results from these models have clearly demonstrated that the aquifers in the Dar es Salaam City are likely to be affected from petroleum hydrocarbons, because the pollution sources are located to a moderate and high vulnerability class, which covers about 80% of the Dar es Salaam City. Furthermore, the gasoline estimated arrival time is about 1 year for transport from the ground surface to a water table aquifer at a depth of 7 m. The current situation of petroleum hydrocarbons found in potable water shows very low concentrations (<2.5g/l) compared to the limits of the Tanzania standards of about 0.5 mg/l. However, as the gasoline takes even decade or centuries to migrate through aquifers, the concentrations are likely to increase if no preventive measures are taken. en_US
dc.language.iso en en_US
dc.publisher The Journal of Building and Land Development. en_US
dc.subject Aquifers en_US
dc.subject ArcView-GIS en_US
dc.subject Dar es Salaam City en_US
dc.subject DRASTIC index en_US
dc.subject HSSM en_US
dc.subject Petroleum hydrocarbons en_US
dc.title Groundwater vulnerability to petroleum hydrocarbons pollution of quaternary sand aquifer in Dar es Salaam, Tanzania en_US
dc.type Article en_US
dc.url en_US

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