Northboro Stream assessment
Summary of report findings
Northboro Stream catchment was one of the earliest areas of the City to undergo urbanisation reaching development capacity in the early 1900s. The area is predominantly residential (82%) with areas of road, a small amount of bush (2%), and some commercial use. The stream is the smallest stream surveyed and is highly modified. The majority of the stream is either piped or concrete lined and as such has limited habitat value. Only one tributary retains a natural substrate providing the only viable habitat for aqautic fauna in the catchment.
Documents
Northboro Stream report PDF 
(810KB)
Northboro Stream maps (PDFs)
Links
North Shore stream assessments overview page
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| Length | 0.7km | |
| Size Of Catchment | 46ha | |
| Vegetation Cover | 5% (2ha), in the lower catchment alongside the lower main channel and Tributaries 1 and 1A. | |
| Imperviousness | 44% | |
| District Plan Land Use | Business | 1% |
| Recreation | 2% | |
| Residential | 82% | |
| Road | 15% | |
| Recreational Use | Low, no significant known public use. | |
| Receiving Environment | Shoal Bay + Waitemata Harbour. | |
| Substrate | Predominantly artificial, silt/mud in Tributary 1 and sections of mud in Tributary 1A. | |
| Natural Wetlands | 1 | |
| Artificial Wetlands | Nil. | |
| Periphyton | Significant periphyton growth in a section of the main channel only but below nuisance levels. | |
| Macrophytes | No management issues. | |
| Macroinvertebrates | No data. | |
| Fish | 1 species of native fish. | |
| Potential Man-Made Barriers to Fish Passage to Upstream Habitat | Nil. | |
| Channel Modification | Significant, the majority of the stream is either piped or concrete lined. | |
| Erosion around Structures | 1 | |
| Bank Erosion | Slight throughout due to concrete lining of the banks and stream bed. Moderate erosion in the (unlined) upper section of Tributary 1. | |
| 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 | Minimal. | |
| Stream Grouping | Group 2, High value low disturbance | - |
| Group 3a, Urban semi-modified | 8% | |
| Group 3b, Urban modified | 18% | |
| Group 4, Concrete lined channel | 23% | |
| Group 5, Piped section | 51% | |