Table 9.2 - Lake chemistry and impacts of 147 representative sites

Source: E Maltby, personal communication

Chemistry Total Threats
 A B C D E F
Freshwater 131 56 7 38 38 8 10
- Oligotrophic 9 7 ­ 1 1 ­ ­
- Mesotrophic 5 1 ­ 3 3 ­ ­
- Eutrophic 34 12 2 18 10 3 2
- Undifferentiated* 83 36 5 17 24 5 8
Brackish 4 1 3 2 1 1 ­
Saline 12 5 2 6 4 3 1
TOTAL 147 62 12 47 43 12 11

* freshwater type unable to be identified owing to insufficient data.

A = non-significant or described
B = hydrological change
C = water quality deterioration
D = tourism/recreation
E = on-site impacts, excavations, developments
F = drainage of marginal vegetation