4.4 Water Quality

The aquifer of the main channel contains fresh to slightly brackish groundwater, recharged by throughflow and surface flood flow. In the shallower channels, flanking the main channel on both sides, brackish groundwater predominates (Christelis and Struckmeier, 2001; Geyh and Ploethner, 1995). Electrical conductivity measurements of flood and aquifer water collected in 1997 illustrate the importance of regular flood recharge (Table 4).

Table 4  Electrical Conductivity 1997 (mS/m) (Murray, 2009).

Omdel Dam water ~57
Recharge Site I (6 km down-stream) ~110
Water abstracted from the aquifer ~190


Managed Aquifer Recharge: Southern Africa Copyright © 2021 by Eberhard Braune and Sumaya Israel. All Rights Reserved.