Articles | Volume 378
https://doi.org/10.5194/piahs-378-29-2018
https://doi.org/10.5194/piahs-378-29-2018
Post-conference publication
 | 
29 May 2018
Post-conference publication |  | 29 May 2018

Spatio-temporal variations of hydrochemical and isotopic patterns of groundwater in hand-dug wells: the Cuvelai-Etosha Basin, Namibia

Josefina Tulimevava Hamutoko, Heike Wanke, Matthias Beyer, Marcel Gaj, and Paul Koeniger

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Cited articles

Bittner, A.: Desk study report: Cuvelai-Etosha groundwater investigation. Windhoek, retrieved from: http://www.the-eis.com/data/literature/Cuvelai Desk Study Report_Version 1.1.pdf (last access: March 2018), 2006. 
Freeze, R. A. and Cherry, J. A.: Groundwater, Prentice-Hall, Englewood Cliffs, USA, 1979. 
Hamutoko, J. T., Wanke, H., and Voigt, H. J.: Estimation of groundwater vulnerability to pollution based on DRASTIC in the Niipele sub-basin of the Cuvelai Etosha Basin, Namibia, Phys. Chem. Earth, 93, 46–54, https://doi.org/10.1016/j.pce.2015.12.007, 2016.  
Hamutoko, J. T., Wanke, H., Koeniger, P., Beyer, M., and Gaj, M.: Hydrogeochemical and isotope study of perched aquifers in the Cuvelai-Etosha Basin, Namibia, Isotopes Environ. Health Stud., 53, 382–399, https://doi.org/10.1080/10256016.2016.1273913, 2017. 
Ledesma-Ruiz, R., Pasten-Zapata, E., Parra, R., Harter, T., and Mahlknecht, J.: Investigation of the geochemical evolution of groundwater under agricultural land: A case study in north-eastern Mexico, J. Hydrol., 521, 410–423, https://doi.org/10.1016/j.jhydrol.2014.12.026, 2015. 
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Short summary
The key finding was that groundwater chemistry of perched aquifers is controlled by dissolution of carbonate or evaporitic minerals, silicate weathering and ion exchange and stable isotopes signify recent recharge. Spatial and temporal variations indicate that groundwater from perched aquifers are chemically different reflecting the aquifer lithologies and hydrological landscape thus groundwater management practices should always be designed taking into account these specific characteristics.