Bayview Stream assessment
Summary of report findings
Bayview Stream catchment originally cloaked in kauri forest until the late 1840s remained a relatively outlying area for some time. Development of the area for predominantly low density residential use, has largely occurred in the past 30 years. Bayview Stream is one of the smallest streams surveyed and has some good quality riparian vegetation providing dense overhead cover. However the watercourse receives significant stormwater inputs from the surrounding residential development causing some erosion of the stream channels.
Documents
Bayview Stream report PDF 
(973KB)
Bayview Stream maps (PDFs)
Links
North Shore stream assessments overview page
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| Length |
2.2km |
|
| Size Of Catchment | 54ha | |
| Vegetation Cover | 26% (14ha) | |
| Imperviousness | 32% | |
| District Plan Land Use | Recreation | 14% |
| Residential | 71% | |
| Road | 15% | |
| Recreational Use | Medium, some known public use of stream locality. | |
| Receiving Environment | Hellyers (Oruamo) Creek, Upper Waitemata Harbour. | |
| Substrate | Bedrock in Tributaries 2 and 3 and the middle section of Tributary 1. The remaining sections were silt/mud. | |
| Natural Wetlands | Nil. | |
| Artificial Wetlands | Nil. | |
| Periphyton | Below nuisance levels. | |
| Macrophytes | No significant densities. | |
| Macroinvertebrates | No data. | |
| Fish | 1 species of native fish. | |
| Potential Man-Made Barriers to Fish Passage to Upstream Habitat | 2 (+ 1 natural barrier). | |
| Channel Modification | Relatively unmodified and natural state throughout except for piped sections at the bottom of the lower main channel and in Tributary 2. | |
| Erosion around Structures | Three outfalls with slight erosion; one with moderate erosion, and one with severe erosion. | |
| Bank Erosion | Majority of stream slight (naturally occurring) erosion. The only significant erosion occurred downstream of outfalls with moderate or severe erosion. | |
| Temperature | No data. | |
| Suspended Solids, Turbidity And Visual Clarity | No measurement of suspended solids or turbidity. Clarity good relative 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 | No significant inorganic debris (other than a roll cage), moderate amounts of organic debris. | |
| Stream Grouping | Group 2, High value low disturbance | 59% |
| Group 3a, Urban semi-modified | 20% | |
| Group 3b, Urban modified | - | |
| Group 4, Concrete lined channel | - | |
| Group 5, Piped section | 21% | |