COSTECH Integrated Repository

Application of environmental isotopes to groundwater recharge studies in a semi-arid fractured crystalline basement area of Dodoma, Tanzania

Show simple item record

dc.creator Nkotagu, Hamisi H.
dc.date 2016-09-21T13:30:35Z
dc.date 2016-09-21T13:30:35Z
dc.date 1999-02
dc.date.accessioned 2018-03-27T08:58:02Z
dc.date.available 2018-03-27T08:58:02Z
dc.identifier Nkotagu, H., 1996. Application of environmental isotopes to groundwater recharge studies in a semi-arid fractured crystalline basement area of Dodoma, Tanzania. Journal of African Earth Sciences, 22(4), pp.443-457.
dc.identifier http://hdl.handle.net/20.500.11810/3952
dc.identifier 10.1016/0899-5362(96)00022-X
dc.identifier.uri http://hdl.handle.net/20.500.11810/3952
dc.description Full text can be accessed at http://www.sciencedirect.com/science/article/pii/089953629600022X
dc.description The distribution of 18O and 2H in various water sources indicates that groundwater recharge is due to local rainfall occurring within the basins. Groundwater recharge takes place under a bypass flow mechanism and matrix diffuse flow and is 3% and 2% of the long-term mean annual rainfall of 550 mm for the Makutapora and Hombolo basins, respectively. Chloride mass balance indicates that 60% and 40% of the total groundwater recharge takes place through macropores and matrix flow, respectively. Sporadic variations in 18O, 2H and chloride among adjacent boreholes suggest existence of a discrete fractured aquifer and/or dominance of local recharge. The relationship between δ2H and chloride indicates that groundwater salinization is due to the leaching of surficial and soil salts during high intensity rainfall, which causes high surface runoff and flash floods. It has been concluded that the isotopic and chemical character of groundwater in fractured semi-arid areas may provide the most effective complementary means of groundwater recharge assessment and therefore is very useful in the management of the water resources.
dc.language en
dc.title Application of environmental isotopes to groundwater recharge studies in a semi-arid fractured crystalline basement area of Dodoma, Tanzania
dc.type Journal Article


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search COSTECH


Advanced Search

Browse

My Account