Sustainability of groundwater in Mali,West Africa |
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| Authors: | Alexandra Lutz James M Thomas Greg Pohll Mamadou Keita W Alan McKay |
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| Institution: | (1) Desert Research Institute, University and Community College System of Nevada, Reno, 2215 Raggio Parkway, Reno, NV 89512, USA;(2) World Vision Mali Rural Water Project, Bla, Mali |
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| Abstract: | The following paper describes the goals and some preliminary work in the Bani sustainability study, an ongoing project in
Mali, West Africa. Rural communities in Mali are increasingly relying on hand-pumps, which tap groundwater resources, as a
means of obtaining potable water. The long-term sustainable yield of groundwater resources is not known but can be evaluated
in sustainability study. In 2005, a groundwater sustainability study was established along the Bani River of Mali. The Bani
study collected groundwater levels that were used in a conceptual groundwater flow model—the Bani model—to develop an understanding
of current aquifer conditions and to make limited predictions of sustainability under various future scenarios. The Bani model
showed the climatic parameters of recharge (derived from precipitation) and evapotranspiration to influence simulated groundwater
levels and groundwater volume available, while increased pumping rates, due to population growth, showed little effect. When
considered in the context of the actual Bani sustainability study area, the change in groundwater levels resulting from climatic
parameters may have negative implications, especially during several consecutive years of decreased precipitation, such as
drought, or if downward trends anticipated for precipitation continue. |
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