Rothesay Bay Stream assessment
Summary of report findings
Rothesay Bay was the last of the East Coast Bays to be settled by Europeans and remained covered in scrub and ti tree for many years throughout the 1800s following felling of the kauri forest which previously clothed the land. By 1959 however the area had become essentially largely developed for residential use. Over the last 40 plus years, remaining areas of rural land and bush have been converted to road, open space and commercial land uses. Rothesay Bay Stream, like many other east coast streams, is a heavily modified watercourse interspersed with piped, lined and culvert sections and retains very little to no riparian/overhead cover.
Documents
Rothesay Bay Stream report PDF 
(979KB)
Rothesay Bay Stream maps (PDFs)
Links
North Shore stream assessments overview page
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| Length |
1.1km |
|
| Size Of Catchment |
65ha |
|
| Vegetation Cover |
8% (5ha) |
|
| Imperviousness | 42% | |
| District Plan Land Use | Business |
1% |
| Recreation | 3% | |
| Residential | 77% | |
| Road | 19% | |
| Recreational Use | Low, no significant known public use. | |
| Receiving Environment |
Rothesay Bay, Hauraki Gulf. |
|
| Substrate |
Artificial lining and silt/mud. |
|
| Natural Wetlands |
Nil. |
|
| Artificial Wetlands |
Nil. |
|
| Periphyton |
Below nuisance levels. |
|
| Macrophytes |
No management issues. |
|
| Macroinvertebrates |
No data. |
|
| Fish |
3 species of native fish. |
|
| Potential Man-Made Barriers to Fish Passage to Upstream Habitat |
5 (+ 1 natural potential barrier). |
|
| Channel Modification |
50% piped, with the remaining 50% either lined or earth contoured banks. |
|
| Erosion around Structures |
1 structure with slight erosion. |
|
| Bank Erosion |
Minimal erosion due to highly artificial nature of the stream channel. |
|
| Temperature |
No data. |
|
| Suspended Solids, Turbidity And Visual Clarity |
No data for suspended solids or turbidity. Clarity poor relative to other North Shore streams. |
|
| Oxygen and Oxygen Demand |
No data. |
|
| Nutrients |
No data. |
|
| Contaminants |
No data. |
|
| Bacteria and Pathogens |
Levels of indicator bacteria indicate the stream is not suitable for contact recreation. |
|
| Sediment Quality |
No data. |
|
| Debris |
No significant debris. |
|
| Stream Grouping | Group 2, High value low disturbance |
- |
| Group 3a, Urban semi-modified |
- |
|
| Group 3b, Urban modified |
30% |
|
| Group 4, Concrete lined channel |
26% |
|
| Group 5, Piped section | 44% | |