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Lake Rotomahana

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Rotomahana Data
Data table

General Information

Lake Rotomahana was enlarged during the eruption of Mt Tarawera during 1886. It is now positioned over two former lakes, one of which was an active geothermal centre. As a result the lake is strongly influenced by geothermal sources (Gibbons-Davies, 2003).

Water enters the lake through a stream from Lake Okaro, while subsurface seepage appears to drain the lake and flow towards Lake Tarawera (EBOP, 2000). There are no surface outflows from the lake.

The impact of future and existing rural development on water quality of the lake is an issue concerning the lake. Soakage to groundwater and run-off to surface waters due to pastoral land use as well as septic tank discharges may adversely affect the lake.

Water Quality Good
Max Depth 125 m
Catchment % pasture 41.4%
Catchment % urban 0%

Available data:

Data Table

Year 818283848586 878889909192 939495969798 990001020304
Water Quality
TN
                



 


  
NO3

              



 


  
NH4

        








 


  
TKN                             
PN

                          
DON

                          
TP                             
DRP           








 


  
PP

                          
DOP

                          
Secchi depth

        








 


  
Chlorophyll a

        








 


  
pH            







 


  
Turbidity                       


  
Physical Properties
Lake height           











   
Temperature & DO Profiles