Table 1 Isotopic characteristics (mean ± SD) of the various water samples at the Gobabeb Research and Training Centre, Central Namib Desert.

Nonrainfall water refers to combined fog and dew samples. ‰, per mil; n, sample size.

Sample typeδ18O‰δ2H‰δ17O‰n
Rain+2.16 ± 3.0+12.72 ± 28.84+0.83 ± 2.95
Nonrainfall water+0.39 ± 3.5+3.74 ± 17.8+0.11 ± 1.953
Dew (composite)−1.25 ± 3.1−7.97 ±13.7−1.22 ± 1.615
Fog (composite)+1.03 ± 3.4+8.37 ± 17.3+0.64 ± 1.838
River water (Kuiseb)−11.49−85.11−6.511
Groundwater*−9.33 ± 0.3−63.97 ± 2.0−4.54 ± 0.24
Groundwater−6.80 ± 0.2−45.88 ± 0.7−3.43 ± 0.22

*Shallow aquifer.

†Deep aquifer.