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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/736

Title: Groundwater resource evaluation of urban Bulawayo aquifer
Authors: Rusinga, F
Taigbenu, AE
Keywords: Groundwater flow
Pumping tests
Urban groundwater
Numerical modelling
Groundwater resource evaluation
Water resources
Issue Date: Jan-2005
Publisher: Water Research Commission
Citation: Rusinga, F and Taigbenu, AE. 2005. Groundwater resource evaluation of urban Bulawayo aquifer. Water SA, vol. 31(1), pp 23-34
Abstract: Judicious management of a groundwater system requires an understanding of its hydrogeology and response to various recharge and pumping stresses. However, in developing countries, groundwater resource evaluations are hampered by a lack of adequate data that will allow for its complete characterisation. Under such circumstances it is not uncommon for ad hoc groundwater management measures to be embarked upon, especially during drought conditions. These were the conditions that existed during the 1991/92 drought when the CSIR Stellenbosch evaluated the groundwater resources of an urban aquifer in Bulawayo, Zimbabwe. Their recommendations revealed that about 3.5x10(6) m(3)/a could be safely abstracted from the aquifer. In this work, a more comprehensive hydrogeological investigation was carried out which included pumping tests, estimation of abstraction rates and recharges, and numerical modelling of the aquifer. The investigations indicate that the aquifer is unconfined with hydraulic conductivity and specific yield ranging from 0.1 m/d to 2.09 m/d and 0.02 to 0.11, respectively. Recharge estimates indicate an annual recharge of 105.5 mm with 38.4%, 52.1% and 9.5% accounting respectively for direct recharge, water mains and sewer leakages. Furthermore, a long-term sustainable annual abstraction of 6.1x10(6) m(3) or 15% of current city water demand can be obtained from the aquifer.
Description: copyright: 2005 Water Research Commission
URI: http://hdl.handle.net/10204/736
ISSN: 0378-4738
Appears in Collections:Water resources and human health
General science, engineering & technology

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