Spatial Variation of Ground water Quality Parameters and its Suitability for Drinking at Makutopora Aquifer, Dodoma Municipality, Tanzania.

Year 2018, Volume: 5 Issue: 3, 337 - 352, 02.12.2018

Mary Kisaka

https://doi.org/10.30897/ijegeo.462691

Cited By: 9

Abstract

A
study was conducted to benchmark the ground water quality parameters and its
spatial variation from Makutopora boreholes which are found 32 km from Dodoma
town. A total of 90 samples (from both deep and shallow wells)
were collected and analyzed for various quality parameters. The analysis results were interpolated using
statistics and Inverse Distance Weighting tool in a Geographical Information
System (GIS) environment to determine their spatial variation. The results indicated that all samples were within the permissible Tanzanian standards, except for two unused production boreholes which showed
higher levels of total hardness,
Electrical conductivity and total dissolved solids. However, gross pollution
was found in community shallow wells of Chihanga and Veyula that showed high levels of nitrate (78-82 mg/l), Manganese (1.05
mg/l), low pH (5.98)
and E. coli. (52/100 ml). It is quite clear from this study that the ground
water supplied to Dodoma is still meeting the set drinking water standards in
Tanzania although aquifer deterioration was noticed which demands an urgent
innovative ground water management. The results
obtained in this study will therefore be helpful for future monitoring and
sustainable ground water quality management in the Makutopora sub basin.

Keywords

Geographical Information System (GIS), Sustainable Ground Water Management, Borehole, Electrical conductivity

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