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Mapeo, R.B.M. and Tschirhart, P.A. (2022) The Geology of Botswana with Emphasis on the Northern and Central Areas: An Explanation of the Geology Accompanying the Pre-Kalahari Geological Map of the Republic of Botswana, 2nd Edition. Bulletin of the Botswana Geoscience Institute, No. 49, 1-122.

has been cited by the following article:

• TITLE: Groundwater Modelling of Motloutse Alluvial Aquifer, Eastern Botswana

  AUTHORS: Edwin O. Keaitse, Nata T. Tafesse, Berhanu F. Alemaw, Kebabonye Laletsang, Read B. M. Mapeo

  KEYWORDS: Alluvial Aquifer, Groundwater, Hydraulic Conductivity, Motloutse River, Eastern Botswana

  JOURNAL NAME: Journal of Water Resource and Protection, Vol.16 No.10, October 31, 2024

  ABSTRACT: The potential groundwater reserve in alluvial aquifers and sandy river beds has not been well studied, and yet their benefit in meeting rural water supply demands cannot be underestimated. A three-dimensional steady-state finite difference numerical groundwater flow model was used to assess the groundwater resource potential on a one-kilometre river stretch scale along the Motloutse River catchment in eastern Botswana. The model area is a single-layer unconfined aquifer system. A uniform grid was laid over this phreatic aquifer, and an overall size of 50 columns x 54 rows was developed. The model yielded calibrated K values of 145 m/day and 11 m/day for the riverbed and riverbank sediments, respectively, and calibrated recharge and evaporation of 172 mm/yr and 120 mm/yr, respectively. A sustainable groundwater yield of 120 m3/day with the potential to irrigate an area of 2.4 hectares was determined. The result also shows that the Motloutse alluvial aquifer yields a safe yield of 29,400 m3 for a kilometre of river stretch.