Fig. 4: Percentages of the significant water quality trend for each catchment and parameter that are attributed to two components: changes in streamflow, and changes in the concentration-flow relationship. | Communications Earth & Environment

Fig. 4: Percentages of the significant water quality trend for each catchment and parameter that are attributed to two components: changes in streamflow, and changes in the concentration-flow relationship.

From: Australian water quality trends over two decades show deterioration in the Great Barrier Reef region and recovery in the Murray-Darling Basin

Fig. 4

The two trend components sum to 100% for each catchment. Results are grouped by parameters in panels, while the x-axis shows the three key regions analysed in three boxes (SE Coast (VIC) – South East Coast (Victoria); MDB – Murray–Darling Basin; NE Coast – North East Coast). The boxes show the range of each trend component across catchments. Note that a trend component may exceed 100% of the water quality trend when some of its effect is cancelled out by the other trend component which has the opposite direction of effect on the water quality trends i.e., the two trend components are counteracting the effect of each other. The centre line and whiskers of each box indicate the median and 1.5 times the interquartile ranges of values.

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