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Title Bridging the data gap: using remote sensing and open-access data for assessing sustainable groundwater use in Kumasi, Ghana | ||
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http://resolver.tudelft.nl/uuid:43cfb87d-75a9-40a5-9917-448d45d8c613 | ||
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Date 2023 | ||
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Author(s) Potter, Estela Fernandes (author); Monney, Isaac (author); Rutten, M.M. (author) | ||
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Abstract Groundwater use has significantly increased in the rapidly urbanising city of Kumasi, Ghana. But there is a lack of understanding of whether the groundwater system can sustain the growing demand in the future amidst climate change and rapid urbanisation. Using remote sensing datasets and a water balance approach, this study estimated the groundwater recharge and assessed how urbanisation has affected its groundwater sustainability. Sustainability is investigated by comparing multi-annual groundwater withdrawals to long-term average annual replenishment. Results show that while groundwater recharge has decreased by 80% from 1986 to 2020, mainly due to substantial (63%) loss of permeable land, groundwater consumption has seen a six-fold increase. Groundwater consumption in 2020 exceeded the long-term average groundwater recharge by 2.2Mm<sup>3</sup>, suggesting that the current groundwater use trends are unsustainable for future ground-water availability. Under a 'business-as-usual' scenario, a four-fold increase in groundwater consumption is predicted by 2050 while climate change and land-cover changes may reduce groundwater recharge by 10% and 55% respectively. Practical measures such as promoting artificial groundwater replenishment approaches, adopting low-impact development and instituting demand management measures must be implemented in the Metropolis. This should be informed by further studies to ascertain the exact condition of the groundwater. - Water Resources | ||
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Subject(s) groundwater; Kumasi; remote sensing; sustainability; urbanisation; water consumption | ||
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Language en | ||
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Relation http://www.scopus.com/inward/record.url?scp=85173233273&partnerID=8YFLogxK; Journal of Water and Climate Change--2040-2244--6da6f129-1e8a-4b46-acd7-f0d5936502e5 | ||
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Type of publication journal article | ||
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Rights © 2023 Estela Fernandes Potter, Isaac Monney, M.M. Rutten | ||
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Identifier doi:10.2166/wcc.2023.261 | ||
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Repository Delft - Technische Universiteit Delft 
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| Added to C-A: 2023-10-18;10:17:35 |
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