Wab water Management Plan
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Visual Assessment & Rehabilitation Management Plan Proposed Landform Raising – Lot 901 South Western Highway, Whitby 10 October 2012 WA Limestone Page 9 SJS TRIM - IN12/17340 OCM122.9/01/13 Visual Assessment & Rehabilitation Management Plan Proposed Landform Raising – Lot 901 South Western Highway, Whitby 10 October 2012 WA Limestone Page 10 SJS TRIM - IN12/17340 OCM122.9/01/13 Visual Assessment & Rehabilitation Management Plan Proposed Landform Raising – Lot 901 South Western Highway, Whitby 10 October 2012 WA Limestone Page 11 SJS TRIM - IN12/17340 OCM122.9/01/13 Visual Assessment & Rehabilitation Management Plan Proposed Landform Raising – Lot 901 South Western Highway, Whitby 10 October 2012 WA Limestone Page 12 SJS TRIM - IN12/17340 OCM122.9/01/13 Visual Assessment & Rehabilitation Management Plan Proposed Landform Raising – Lot 901 South Western Highway, Whitby 10 October 2012 WA Limestone Page 13 4.0 Visual Management The Darling Scarp is a visually sensitive area that is recognised in both Local and State Government planning policies. Inappropriate developments located on the Scarp can create visual impacts that might be seen from a large area of viewpoints. The Shire of Serpentine - Jarrahdale Local Planning Policy LP8 – Landscape Protection has a number of aims for the protection of the visual quality of the Darling Scarp. The aims of this policy have been taken into account with this visual assessment. The visibility of a feature within the landscape can be quantified and this document provides an assessment of the potential visibility of the proposal. Visual impact however is often highly subjective and based on the individual perceptions of the observer. A feature may be perfectly acceptable and unobtrusive to one person however another may feel that it causes impact. In order to assess the potential visual impact, the value of the landscape and public expectations were considered, the visual aspects of the proposal in the context of the surrounding landscape, and the scale and duration of the proposal and any alteration to the visual qualities of the site. 4.1 Potential Impact 4.1.1 Landscape value The Darling Scarp is a significant feature in the landscape and the community has a high expectation for the protection of its visual characteristics. Inappropriate development on the scarp has the potential to cause visual impact over a large area. WA Bluemetal’s proposal involves the progressive raising of the natural landform by up to 3 metres over an area of 10.3 hectares. As the existing landform will be retained there will not be any significant alteration to the landscape. The entire proposal area will be revegetated back to either pasture as currently exists or to native vegetation. Therefore there will be no permanent visual impact at any viewpoint. Any impact will be short term and limited to the duration of the works. 4.1.2 Visual landscape character The character of the landscape, east of South Western Highway is predominantly rural, quarrying and native vegetation. This collection of land uses is consistent along the length of the Darling Scarp. Though the quarries are a major land use and occupy a substantial area through careful design and management they contribute SJS TRIM - IN12/17340 OCM122.9/01/13 Visual Assessment & Rehabilitation Management Plan Proposed Landform Raising – Lot 901 South Western Highway, Whitby 10 October 2012 WA Limestone Page 14 4.1.3 Context in the landscape In visual terms the project involves the temporary disturbance of the pasture land as the site is prepared, overburden placed, and then rehabilitated. The overburden placing is a necessary but ancillary activity to WA Bluemetal’s adjacent quarry. Quarrying on the scarp commenced shortly after European settlement and continues to this day and is an accepted part of the landscape. Within the vicinity of the proposal a number of historic and active quarries exist. Historically the visibility of quarries was not considered significant however in more recent years more effort has been made in limiting and improving the visual aspects of these quarries. The disturbance of pasture land by ripping or tillage is a typical agricultural process that temporarily exposes the soil and removes any previous crops or grasses. Such activities are commonplace and to be expected within a rural landscape, which the proposal is within. Whilst the earthworks required for the project are more substantial than that required for agricultural ground preparation, in terms of visual impact they are not dissimilar, particularly when viewed from a distance. 4.2 Assessment Methodology A viewshed analysis of the proposal area was undertaken with ESRI ArcGIS 10 3D Analyst software to identify the ‘seen area’ of the proposed development. A digital elevation model (DEM) of the area was created with a combination of data supplied by Landgate and from WA Bluemetal’s surveys. Vegetation is highly effective in providing visual screening. In order to consider this in the 3D analysis, the existing vegetation was digitised from existing recent orthophotography. The vegetated areas of the DEM were then extruded by the estimated average height of the vegetation. Increasing the elevation of these areas to the height of the vegetation simulates the screening properties of the vegetation. For the purpose of this exercise vegetated areas were excluded as potential viewpoints. The viewshed was examined to a distance of 5 kilometres from the proposal. Beyond this distance the effects of perspective and scale are such that the proposal is highly unlikely to cause impact. The computer modelling was then validated by field investigations conducted by James Della Bona on 3 July 2012 by walking all of Lot 3 with an examination of the remnant vegetation in addition to an examination of the local roads and views. SJS TRIM - IN12/17340 OCM122.9/01/13 Yüklə 20,11 Mb. Dostları ilə paylaş:
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