AUTHOR=Amwele Hilma Rantilla , Kgabi Nnenesi Anna , Kandjibi Liisa Indileni TITLE=Sustainability of Groundwater for Irrigation Purposes in Semi-arid Parts of Namibia JOURNAL=Frontiers in Water VOLUME=3 YEAR=2021 URL=https://www.frontiersin.org/journals/water/articles/10.3389/frwa.2021.767496 DOI=10.3389/frwa.2021.767496 ISSN=2624-9375 ABSTRACT=
The groundwater quality data from 1,137 boreholes in 10 regions of Namibia were assessed for sodium adsorption ratio (SAR), Kelly's ratio (KR), sodium percentage (Na%), magnesium adsorption ratio (MAR), total hardness (TH), soluble sodium percentage (SSP), potential salinity (PS), electrical conductivity (EC), and total dissolved solids (TDS) to determine the suitability for the irrigation. The groundwater was classified as follows: all the regions' groundwater shows the TH as very hard water of >4.6 meq/l, PS as not suitable for irrigation (>3 meq/l), and EC as very highly (0.75–2.25 d