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Lake Okareka

General Information

Also on this page:

Catchment information
Available data
Ocean View plots
Data Table

Lake Okareka is a shallow lake that stratifies for approximately six months of each year. It has the second highest density of human habitation, increasing during summer months.

Lake Okareka is linked to Lake Tarawera via the Waitangi Spring.

There are few problems with the lake, however during periods of deoxygenation of the bottom waters nutrients are released from the sediments. The quality of the lake is poorer than the baseline quality requirements of EBOPís regional plan (EBOP, 2000).

The Lake is threatened by the impacts of existing and future urban and rural development as well as natural hazards. Urban septic tanks and the fluctuating lake levels are also issues of concern.

Water Quality Moderate
Max Depth 30 m
Catchment % pasture 55.8%
Catchment % urban 2.9%

Catchment Information:

The following data is from the Environment Bay of Plenty Lake Okareka Catchment Management Action Plan.

Land CoverArea (ha)Area (%)
Bare ground
Forest indigenous
Forest planted
Pasture
Scrub mixed
Urban
TOTAL
8
513
93
839
125
45
1624
0.5
31.6
5.8
51.6
7.7
2.8
100
Farming typeArea (ha)Area (%)
Sheep and beef
Sheep
Beef
Deer
Other
TOTAL
691
15
83
32
16
839
42.6
0.9
5.1
2.0
1.0
51.6

For more information click here to access the report.

Available data:

SiteYearData description
Site 11987 - 2002
1990 - 2002
profiles, station depth
water quality, lake height, secchi depth
Site 21994 ,1995station depth, secchi depth, profiles, water quality
Site 101980 - 1999Secchi depth
data
data - DYRESM format

SiteYearData description
Site RP11981, 1982profiles, chlorophyll a, secchi depth
Site ROKN1992 - 1996profiles
Site ROKS1992profiles
Site ROKC1992 - 1996profiles
data

Link to bathymetry
Link to Meteorological data
Link to Ocean View data

 

Ocean View plots

 

Data Table

Site 1
Site 2
Site 10
Sites RP1, ROKN, ROKC, ROKS

Year 818283848586 878889909192 939495969798 990001020304
Water Quality Data
TN            














  
NO3           














  
NH4           














  
TKN                             
TP           














  
DRP           














  
Secchi depth



































  
Chlorophyll a

        














  
Turbidity                       


  
pH              












  
Physical Properties
Lake height           












  
Temperature and DO profiles