Ngataringa Stream assessment
Summary of report findings
Ngataringa Stream catchment is amongst one of the oldest areas within the City and was fully developed during the late 1800s and early 1900s. The catchment and stream have been highly modified due to reclamation of a large portion of Ngataringa Bay. Natural drainage within the catchment has been significantly altered with flow being directed around the inland margin of the reclamation before discharging to the north of Ngataringa Bay. The majority of the channel is concrete lined and the morphology of two remaining small sections of open watercourse have also been altered.
Documents
Ngataringa Stream report PDF 
(440KB)
Ngataringa Stream maps (PDFs)
Links
North Shore stream assessments overview page
You will need Acrobat Reader to view some documents on this page, which can be downloaded free from www.adobe.com
| Length | 2.0km | |
| Size Of Catchment | 120ha | |
| Vegetation Cover | 9% (10.1ha), distributed throughout the catchment. | |
| Imperviousness | 36% | |
| District Plan Land Use | Business | <1% |
| Recreation | 34% | |
| Residential | 50% | |
| Road | 16% | |
| Recreational Use | Low, no significant known public use. | |
| Receiving Environment | Ngataringa Bay, Shoal Bay, Waitemata Harbour. | |
| Substrate | Predominantly concrete. | |
| Natural Wetlands | Nil. | |
| Artificial Wetlands | 2 | |
| Periphyton | At nuisance levels throughout the stream except Tributary 1A. | |
| Macrophytes | No management issues. | |
| Macroinvertebrates | No data. | |
| Fish |
No species of native fish found. Local resident observations of eels and possibly banded kokopu. |
|
| Potential Man-Made Barriers to Fish Passage to Upstream Habitat | 2 | |
| Channel Modification | The most modified stream surveyed on the North Shore with only two short lengths of unlined channel. | |
| Erosion around Structures | Nil. | |
| Bank Erosion | Only slight erosion at the head of the main channel and in Tributary 1A, no other erosion present due to concrete lining and piping of watercourse. | |
| Temperature | No data. | |
| Suspended Solids, Turbidity And Visual Clarity | Relatively clear compared to other North Shore streams. | |
| Oxygen and Oxygen Demand | No data. | |
| Nutrients | No data. | |
| Contaminants | No data. | |
| Bacteria and Pathogens | No data. | |
| Sediment Quality | No data. | |
| Debris | Insignificant. | |
| Stream Grouping | Group 2, High value low disturbance | - |
| Group 3a, Urban semi-modified | 7% | |
| Group 3b, Urban modified | 10% | |
| Group 4, Concrete lined channel | 70% | |
| Group 5, Piped section | 13% | |