Lake Rotoehu

Lake Rotoehu has a series of arms at its northern end and geothermal springs exist on the south east shore. No surface outlet for the lake exists, however an exit exists along the shoreline of one of the northern arms (EBOP, 2000).

The quality of the lake deteriorated significantly in 1994 and has since remained stable (Gibbons-Davies, 2003). It is possible that the south west section of the lake may receive direct thermal input (EBOP, 2000).

Runoff to surface waters and soakage to groundwater from pastoral land use may impact the quality of the lake. The existing and future rural developments may therefore adversely affect the water quality of Lake Rotoehu.

Water Quality	Poor
Max Depth	13.5 m
Catchment % pasture	39.9%
Catchment % urban	0%

Plots

Available Data:

• Temperature and DO profiles, water quality data, lake heights
  Sites 1 & 3
  Data

• Temperature, water quality in DYRESM format
  Sites 1 & 3
  Data

• Bathymetry
• Link to Rotorua Airport meteorological data

Data Table

Year	87	88	89	90	91	92	93	94	95	96	97	98	99	00	01	02	03	04
Water Quality
TN
NO3
NH4
TKN
TP
DRP
Secchi depth
Chlorophyll a
Turbidity
pH
Physical Properties
Lake height
Temperature and DO profiles