Appendix D - Riparian Rehabilitation Plan

 

 

General Site Information - Overview

This Riparian Rehabilitation Plan has been prepared to direct the ecological restoration of the
waterway and immediately adjoining riparian zone within Lot 83 on MCH3546 located at 157
Lawnville Road, Black Mountain.

A second order stream flows through the property which is mapped as waterway under
Biodiversity, Waterways and Wetlands Overlay mapping within the Noosa Plan 2020. A Riparian
Protection Area extends outwards from the mapped waterway and covers the majority of the
site. The Biodiversity, Waterways and Wetlands Overlay Code within the Noosa Plan 2020
includes performance objectives PO6 and PO10 and acceptable outcomes (AO6.2) which
requires the enhancement of riparian corridors and connectivity and rehabilitation of
ecologically important areas. In this regard, this Rehabilitation Plan has been prepared to satisfy
the relevant performance objectives of the Overlay Code.

The Rehabilitation Area is proposed to encompass all existing riparian vegetation that adjoins
the mapped waterway. The Rehabilitation Area has an average width of 25-30m and covers a
total area of approximately 1.14ha (refer to Plate 1). The Rehabilitation Area is characterised by
a band of riparian notophyll vine forest which is flanked by mowed grass. Plates 2 and 3 depict
existing conditions within the Rehabilitation Area.

The Rehabilitation Area contains moderate to high in-situ ecological resilience, with a diversity
of native recruitment occurring in the ground stratum (refer to Plates 4 and 5). Selective weed
control within the Rehabilitation Area is expected to encourage recruitment from the existing
soil stored seed bank and from outside sources. The Rehabilitation strategy prescribed for the
area will involve both reconstruction/revegetation and assisted natural regeneration as defined
in the South East Queensland Ecological Restoration Framework - Manual (Chenowith LPA,
2012).

The Rehabilitation Area is mapped by the Queensland Herbarium as containing the pre-clearing
regional ecosystem RE 12.3.1 which is described as Gallery rainforest (notophyll vine forest) on
alluvial plains. The existing tree species and native recruitment within the Rehabilitation Area
was observed to be consistent with the regional ecosystem mapping. The narrow band of trees
is dominated by mature Waterhousea floribunda (weeping lily pily), with Ficus coronata (creek
sandpaper fig), Neolitsea dealbata (white bolly gum), Archontophoenix cunninghamiana
(picabeen palm), Cryptocarya sp. (laurels) with mature Eucalyptus grandis (flooded gum)
emergents also present. The edge of the waterway is dominated by a dense band of semi-
aquatic herbs and macrophyte species including Lomandra hystrix (mat rush), and several native
sedge species (Cyperus spp.).

Several weed species occur within the Rehabilitation Area in generally low densities. Primary
weed control and ongoing maintenance of the Rehabilitation Area is expected to assist in
reducing the potential for weed dominance and over-competition as the native species
composition re-establishes over time. Direct revegetation and the enhancement of the riparian
corridor through the control of the existing invasive species is expected to satisfy the
requirements of the relevant performance objectives contained within the Biodiversity,
Waterways and Wetlands Overlay Code. The level of rehabilitation proposed is considered
commensurate with the development proposed within the site, which is a low impact
development that does not pose excessive impacts to the local environment.

   

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PLATE 1 - RIPARIAN REHABILITATION AREA

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PLATE 4 & 5 EXISTING CONDITION

RIPARIAN REHABILITATION PLAN
157 LAWNVILLE ROAD,
BLACK MOUNTAIN

 

LEGEND

DEVELOPMENT SITE

[EBB iranian REHABILITATION AREA
APPROXIMATELY 1.22ha

 

 

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