Figure 6

Diagram showing combination of Na-normalized ionic ratios of (a) Ca2+ versus HCO3– and (b) Ca2+ versus Mg2+, for Ethiope river (wet and dry season).

Diagram showing combination of Na-normalized ionic ratios of (a) Ca2+ versus HCO3– and (b) Ca2+ versus Mg2+, for Ethiope river (wet and dry season).