Summary of report findings
Lake Pupuke is the only lake of its type within the Auckland region. Sitting in a volcanic explosion crater formed approximately 140,000 years ago, the lake is an important ecological, geological, cultural, recreational and scenic resource. The relatively small surrounding catchment is developed, mainly for residential use. Lake water quality is relatively good in comparison to other lakes in the Auckland Region and has improved since the early-mid 20th century.
Documents
Lake Pupuke report PDF 
(1.65MB)
Lake Pupuke maps (PDFs)
Links
North Shore stream assessments overview page
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| Area / Shoreline Length / Depth |
110 hectares / 4.3 kilometres / 57 metres |
|
| Size Of Catchment | 87 hectares | |
| Vegetation Cover | 16 hectares (18%) | |
| Imperviousness | 36 hectares (41%) | |
| District Plan Land Use | Business | 0.2% |
| Recreation | 19% | |
| Residential | 49% | |
| Road | 9% | |
| Rural | 23% | |
| Recreational Use | High – mainly water based | |
| Receiving Environment | Subsurface discharge to Thorne Bay | |
| Natural Wetlands | 5 lacustrine (lake edge) wetlands | |
| Artificial Wetlands | None. Stormwater treatment wetland proposed | |
| Periphyton | At least 96 species recorded, four potentially toxic blue-green algae (cyanobacteria) occur | |
| Macrophytes | Dominated by introduced eel grass Vallisneria gigantica and oxygen weed Egeria densa – management issues | |
| Macroinvertebrates | Variety of species | |
| Fish | Native – eels and common bully; variety of introduced species | |
| Birds | Abundant and diverse range use lake and surrounding reserves for feeding and roosting | |
| Riparian Vegetation | Limited | |
| Shoreline Modification | 44% of shoreline lined or reinforced | |
| Shoreline Erosion | Approx. 5% of shoreline has slight erosion | |
| Lake Type | Warm monomictic | |
| Temperature | 12 – 22+ oC, thermally stratified for most of the year | |
| Suspended Solids, Turbidity And Visual Clarity | Relatively clear, low turbidity and suspended solids | |
| Oxygen And Oxygen Demand | Good in upper layer, severely depleted in lower layer during summer / autumn | |
| Trophic Status | Mesotrophic | |
| Contaminants | No data | |
| Bacteria And Pathogens | Generally low faecal coliforms | |
| Sediment Quality | No data | |