Figure 4.1: Summary data for flow and temperature from the NRWQN over a 17-year period (1989-2005)
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Note: Lines, from bottom to top, correspond to values of the 5th, 20th, 50th, 80th and 95th percentiles for each year (n of sites = 77).
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This figure shows the trend in water temperature. Our coolest rivers (5th percentile water temperature) have shown a warming trend between 1989 and 2005. A regression line fitted to the data indicates a change of 1.6°C over 17 years.
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