Lake Okataina

Water Quality High but variable Nth Basin Max Depth 65 m Sth Basin Max Depth 78.5 m Catchment % pasture 9.6% Catchment % urban 0% Lake Okataina is a deep, oligotrophic lake (Deely, 1995) and was formed approximately 7000 years ago. Geothermal springs exist on the eastern shore of the lake. Lake Okataina has no surface outlet and consequent water level fluctuations. This fluctuation can influence the quality of the lake (Gibbons-Davies, 2003).

Issues concerning the lake and its catchment include those of pests and future development. Pests are threatenning the indigenous plants and animals within the catchment while trout are impacting the native water ecosystems of the lake (EPOB, 2000).

Available Data:

• 1981,1982; 1992-1996
  Temperature and DO profiles, water quality
  Sites 110, ROTS, ROTN

• 1990-2002
  Temperature and DO profiles, water quality, lake heights
  Site 1
• 2001,2002
  Temperature and DO profiles
  Site 1
• 1990 - 2002
  Water quality, profiles - DYRESM format

• Lake Okataina Ion results

• Bathymetry

• Link to Rotorua airport meteorological data

• Link to Ocean View data

Data Table

Year	81	82	83	84	85	86	87	88	89	90	91	92	93	94	95	96	97	98	99	00	01	02	03	04
Water Quality
TN
NO3
NH4
PN
DON
TP
DRP
PP
DOP
Secchi depth
Chlorophyll a
pH
Turbidity
Physical Properties
Temperature and DO profiles
lake height