Fig. 1: Global distribution of trends in total dissolved solids (TDS) and water discharge (Q).
From: Global syndromes induced by changes in solutes of the world’s large rivers

a Global distribution of TDS data length in 149 world’s large rivers. b Trends in Q for 600 hydrologic stations. c Number of rivers with different patterns of co-varying trends in Q and TDS in each of six continents. The insert Sudoku table and histograms display the three (or two) dominant patterns for each continent. All trends are significant at the 0.05 significance level.