Notes:
(1) Different scales are used for dissolved oxygen and water temperature.
(2) mg/L = milligrams per litre.
Source: Adapted from Ministry for the Environment, 2006d.
Text description of figure
|
| Median dissolved oxygen | Median water temperature |
|---|---|---|
| 1989 | 100.55 | 12.9 |
| 1990 | 100.75 | 12.3 |
| 1991 | 101 | 11.3 |
| 1992 | 101 | 11.35 |
| 1993 | 101.5 | 11.9 |
| 1994 | 100.8 | 11.7 |
| 1995 | 100.7 | 12.15 |
| 1996 | 100.75 | 11.9 |
| 1997 | 100.75 | 11.3 |
| 1998 | 100.75 | 12.55 |
| 1999 | 100.65 | 12.55 |
| 2000 | 100.3 | 11.95 |
| 2001 | 100.7 | 13.05 |
| 2002 | 100.9 | 12.1 |
| 2003 | 101.05 | 12.3 |
| 2004 | 100.6 | 12 |
| 2005 | 100.65 | 12.9 |
Figure 10.9: Trends in dissolved oxygen and water temperature in rivers in the national monitoring network, 1989–2005
March 2021
© Ministry for the Environment