Lake Kainui

(Lake D, Rotoaira)

General Information

Lake Kainui is highly peat-influenced, as it is located within the Kainui peat bog, in the Horsham Downs area. Previously no submerged vegetation has been recorded in this lake (Champion et al., 1993), however, the presence of charophytes was recorded during a recent survey. Lake Kainui suffers from regular cyanobacterial blooms, which can become a hinDrance to recreational activities such as power boating on the lake.

Lake Kainui photo by Wendy Paul

Lake Kainui Statistics

Area24.9 ha
Maximum depth6.7 m
Trophic stateEutrophic
RecreationPower boating
Restoration progressLake perimeter is fenced and riparian planting is underway
Peat influenceHigh, Kainui peat bog
Reserve statusRecreation, administered by the Waikato District Council
Submerged vegetationSubmerged vegetation is not common, but marginal species that have been recorded are: Nitella hookeri/cristata, Potamogeton ochreatus and P. cheesemanii.
Harmful algae 
Invasive fishCatfish, rudd and gambusia


Boswell et al. (1985). Waikato small lakes: resource statement. Waikato Valley Authority.

Champion et al. (1993). The Vegetation of the Lower Waikato Lakes. Volume 2: Vegetation of thirty-eight lakes in the lower Waikato. NIWA Ecosystems Publication No.8 August 1993.

Faithfull et al. (2006). Waikato peat lakes sediment nutrient removal scoping exercise. Environment Waikato Technical Report TR06/15.

Thompson M. (1994). Substrate coring around the Waipa Peat Lakes to aid in the establishment of Esplanade Reserving. BSc (Technology) Industry Report. University of Waikato, Hamilton, New Zealand.