Plans, policies and reports
Maungawhau Mt Eden management plan
Contents |
Section A: Introduction |
Section B: Management of the physical landscape |
Section C: Erosion |
Section D: Visitor experience |
Section E: Buildings and structures |
Section F: Leases, licences, permits and easements |
Section G: Management structure |
Section H: Background information
Section C: Erosion
C1 Erosion
As noted in the conservation plan, erosion is probably the most widespread
management issue, affecting almost the entire mountain. The site is vulnerable
to such damage, as the scoria based soils on the mountain are readily mobilised
on the slopes. Causes of erosion include natural processes, earthworks (for
example for the road), excavation for utilities, loss of grass cover and
tracking caused by pedestrians and grazing stock. Evidence of such damage is
apparent in observations of slips, soil creep and the filling and shortening of
terraces.
Soil erosion is a fundamental issue because it has a central bearing on the
preservation of the form of the mountain and its constituent archaeological
features.
In order to minimise the acceleration of natural erosion processes, visitors,
stock and vegetation need to be managed more effectively. The management plan
needs to facilitate education about the significance of the site, in order to
improve visitor behaviours. It also needs to enable the creation of an easy to
follow and well-maintained track network that encourages visitors to use
'sanctioned' routes around the mountain.
Investigations will be undertaken as part of the implementation of this
management plan to work towards establishing an alternative grass cover that
provides erosion protection, allows access, presents the form of archaeological
features and the cone itself, can be managed to control risks of fire and pests
and does not require grazing (refer to Section B: Management of the physical
landscape, for policies on grazing and grass cover).
An important aspect of the management of erosion on the reserve will be
monitoring. A programme of monitoring will assist in the identification of areas
needing remediation, areas at risk and therefore requiring preventative
measures, and the evaluation of any measures undertaken. Monitoring can include
photographic and observation surveys.
C2 Objectives
C2.1 To reduce the accelerated erosion caused by human use and grazing animals
to a minimum.
C2.2 To monitor and where possible, remediate existing erosion problems.
C2.3 To ensure future activities contribute as little as possible to any
acceleration of erosion processes.
C3 Policies
Erosion
| |
|
Relevant objective |
| C3.1 |
By restricting the use of bicycles to the existing road only. |
C2.1 |
| C3.2 |
Move towards a system of vegetation management that requires minimal or no
grazing. (Refer to policies B3.6,
B3.7, B3.8) |
C2.1 |
| C3.3 |
By maintaining vegetative cover consisting of approved species (as defined
in the vegetation plan) on all areas of the mountain to protect underlying
soils. (Refer to policies B3.1,
B3.2) |
C2.1 |
| C3.4 |
By implementing a programme for monitoring erosion and damage. (Refer to
policies B3.8, D3.5,
D3.8) |
C2.2 |
| C3.5 |
By implementing a programme of remedial works and erosion repair that
includes the repair of damaged archaeological features, areas of denuded or worn
vegetation, eroded track scars and geotechnically unstable slopes or cliffs.
(Refer to policy D3.7, C3.6) |
C2.2 |
| C3.6 |
By locating and maintaining pedestrian tracks so that wear damage to
underlying archaeology and geology is minimised. (Refer to policy
C3.5, D3.7) |
C2.3 |
Published May 2007
