Editing Hydrogeology of Namibia

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||Recharged by river leakage when ephemeral Kuiseb River flows
 
||Recharged by river leakage when ephemeral Kuiseb River flows
 
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|Cuvelai-Etosha Basin (Unit 1 and 2), including Ohangwena Aquifer System (Unit 2)
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|Cuvelei-Etosha Basin (Unit 1 and 2), including Ohangwena Aquifer System (Unit 2)
 
||This is a three layered system dominated by unconsolidated sand with some sandstones, with an average aquifer thickness of 220 m. It has a high primary porosity with no secondary porosity, and high horizontal connectivity. The average transmissivity value is 220 m²/day. The average piezometric level is 30 m below ground level, and the aquifer is mostly confined, but in some parts is unconfined. Typical borehole depth is 100 to 250 m.  
 
||This is a three layered system dominated by unconsolidated sand with some sandstones, with an average aquifer thickness of 220 m. It has a high primary porosity with no secondary porosity, and high horizontal connectivity. The average transmissivity value is 220 m²/day. The average piezometric level is 30 m below ground level, and the aquifer is mostly confined, but in some parts is unconfined. Typical borehole depth is 100 to 250 m.  
 
||About 35% of the deep aquifer has groundwater that is unsuitable for drinking water.
 
||About 35% of the deep aquifer has groundwater that is unsuitable for drinking water.

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