Physicochemical parameters and stable isotope composition of water in Northern Mara Sub-Goldfield, Tanzania: Implications for groundwater-surface water interaction

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dc.contributor.authorMyovela, Justine L.
dc.contributor.authorGodfray, Godson
dc.contributor.authorSalimu, Mohamedi
dc.date.accessioned2023-05-25T06:07:01Z
dc.date.available2023-05-25T06:07:01Z
dc.date.issued2022
dc.descriptionAbstract. Full text available at https://doi.org/10.5194/egusphere-egu22-1280en_US
dc.description.abstractThis study focuses on water quality assessment and hydrological aspects around northern Mara Sub-Goldfield (Tanzania). A total of 26 water samples were collected from different sampling sites for physicochemical characterization and H-O isotopes analysis. Parameters such as pH, electrical conductivity (EC), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), and total hardness were analyzed for each water sample. The 18O/16O and 2H/1H ratios were measured in water samples and expressed as δ18O and δ2H relative to Vienna Standard Mean Ocean Water (V-SMOW). The study revealed that the majority of drinking water sources meet the recommended World Health Organization (WHO) and Tanzania Bureau of Standards (TBS) levels. Drinking water from Kegonga community borehole (pH=6.62, EC=1690 µs/cm, TDS=1080 mg/l), shallow well east of Ingwe Dam (pH=7.32, EC=1720 µs/cm, TDS= 1000mg/l), shallow well south of tailings dams (pH=7.6, EC=2670 µs/cm, TDS=1780 mg/l) and traditional well (pH=5.76) are not suitable for drinking purposes. Isotopic values of studied water samples have shown a wide variation from -28.5 to 21.4 ‰ for δ2H, -5.37 to 2.37 for δ18O ‰, and -3.7 to 16.08 ‰ for D-excess values. The slope of Local Meteoric Water Line (δ2H = 5. 9 δ18O + 5.51; R2=0.94) is slightly lower than the slope of Global Meteoric Water Line (δ2H = 8.2 δ18O + 11.27; R2=1), which indicates that the majority of studied water samples have been isotopically modified. The study demonstrated that the majority of groundwater has been recharged by more evaporated sources likely wastewater from tailings dams. This finding is supported by the consistency of isotopic signature and physicochemical parameters of several groundwater sources with those of surface water discharged from the mines.en_US
dc.identifier.citationMyovela, J. L., Godfray, G., & Salimu, M.: Physicochemical parameters and stable isotope composition of water in Northern Mara Sub-Goldfield, Tanzania: Implications for groundwater-surface water interaction, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022,en_US
dc.identifier.otherDOI: https://doi.org/10.5194/egusphere-egu22-1280
dc.identifier.urihttp://hdl.handle.net/20.500.12661/3963
dc.language.isoenen_US
dc.publisherEGU General Assemblyen_US
dc.subjectGroundwateren_US
dc.subjectSurface wateren_US
dc.subjectWater qualityen_US
dc.subjectStable isotopesen_US
dc.subjectd-excessen_US
dc.subjectTanzaniaen_US
dc.subjectMaraen_US
dc.subjectSub-Goldfielden_US
dc.subjectPhysicochemical parametersen_US
dc.subjectTotal Suspended Solidsen_US
dc.subjectTSSen_US
dc.subjectTotal Dissolved Solidsen_US
dc.subjectTDSen_US
dc.subjectHydrological aspectsen_US
dc.titlePhysicochemical parameters and stable isotope composition of water in Northern Mara Sub-Goldfield, Tanzania: Implications for groundwater-surface water interactionen_US
dc.typeArticleen_US
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