Water source Units No. of samples Min. Max. Mean Median STD Error
Regional groundwater δ18O 599 -4.6 0.1 -2.28 -2.25 0.02
Bugondo and Pallisa groundwaters δ18O 19 -2.8 -2.1 -2.47 -2.43 0.2
Jinja groundwater δ18O 12 -0.1 2.8 1.44 1.38 0.3
L. Kyoga wetlands δ18O 4 -2.6 4.9 1.08 0.97 2.1
L. Kyoga δ18O 5 4.4 5.7 4.83 4.54 0.2
L. Victoria δ18O 45 2.8 4 3.46 3.46 0.03
L. Victoria groundwater and springs δ18O 29 -3.5 -1.2 -2.77 -2.91 0.1
L. Victoria Rivers δ18O 11 -3.2 3.8 -0.85 -1.59 0.7
Entebbe rainfall δ18O 150 -11.6 2.9 -2.2 -2.1 0.2
Regional groundwater δ2H 599 -19 9 -5.18 -4.44 0.2
L. Victoria groundwater and springs δ2H 29 -16 1 -8.88 -9.4 0.7
L. Victoria Rivers δ2H 11 -13 26.5 1.74 -1.1 3.8
Entebbe rainfall δ2H 150 -81.2 26.5 -4.8 -2.8 1.3
Table 1: δ18O and δ2H summary of stable isotope data (‰VSMOW) from upper Victoria Nile Basin waters (source: DWRM, Entebbe & Field fresh sample tests from Pallisa District, 2010).