No analysis of view sheds or visual sensitivity could be performed due to time constraints. The visual sensitivity of the reserve should be considered as high throughout unless specifically demonstrated otherwise by proper analysis. Physical and biodiversity sensitivities that were included in the analysis are as per the table below (Table 5.1). Table 5.1: Summary overview of physical and biodiversity components used in the sensitivity analysis of Goukamma Nature Reserve Complex (terrestrial section; see Figure 5.2). Category Dataset Criteria Sensitivity score Component > 30° Effectively off-limits for infrastructure development Highest due to extreme risk of erosion and instability, or 5 sensitivity extreme engineering mitigation and associated construction costs required. Slope 5°-30° calculated The Wankoe Formation consisting largely of ancient from 5 m dunes combined with the slope lends this geological resolution feature to be considered more sensitive than in DEM other areas. Slope (courtesy Strongly avoid for infrastructure development – cut High (degrees) Centre for 4 and fill or other difficult and expensive construction sensitivity Geographical method required. Appropriate engineering Analysis, mitigation essential to prevent erosion and slope Stellenbosch instability. Highest initial and on-going cost due to University) slope stabilisation and erosion management required. 0°-5° Preferred areas for any built infrastructure, lowest Lowest 1 risk of erosion or instability, lowest construction and sensitivity on-going maintenance costs. Vlok et al. Mobile sands (e.g. drift sands) and beaches, and (2008) other loose sands corresponding to unstable, Highest Substrate 5 vegetation erosion-prone or mobile substrates are identified as sensitivity map sensitive features. Areas at or below 5 m 5 m resolution DEM (courtesy Centre for Highest 5 above sea Geographical Analysis, Stellenbosch University sensitivity level Flood risk (Hydrological) Mapped by reserve staff (these need to be updated Highest 5 and verified in the field) sensitivity Depressions High Within 200 m of a depression 4 Physical sensitivity Highest Within 200 m of perennial river 5 1: 50 000 NGI sensitivity Rivers Rivers Highest Within 100 m of non-perennial river 5 sensitivity Highest Wetland 5 sensitivity Wetlands NFEPA High Within 200 m of wetlands 4 Biodiversity sensitivity Vegetation GRI Highest Critical (Sedgefield Sandplain Fynbos) 5 status vegetation sensitivity (Conservation map (Vlok et Endangered (Hartenbos Primary Dune, Groot Brak High 4
No analysis of view sheds or visual sensitivity could be performed due to time constraints. The visual sensitivity of the reserve should be considered as high throughout unless specifically demonstrated otherwise by proper analysis. Physical and biodiversity sensitivities that were included in the analysis are as per the table below (Table 5.1). Table 5.1: Summary overview of physical and biodiversity components used in the sensitivity analysis of Goukamma Nature Reserve Complex (terrestrial section; see Figure 5.2). Component Category Dataset Criteria Sensitivity score Physical Slope (degrees) Slope calculated from 5 m resolution DEM (courtesy Centre for Geographical Analysis, Stellenbosch University) > 30° Effectively off-limits for infrastructure development due to extreme risk of erosion and instability, or extreme engineering mitigation and associated construction costs required. Highest sensitivity 5 5°-30° The Wankoe Formation consisting largely of ancient dunes combined with the slope lends this geological feature to be considered more sensitive than in other areas. Strongly avoid for infrastructure development – cut and fill or other difficult and expensive construction method required. Appropriate engineering mitigation essential to prevent erosion and slope instability. Highest initial and on-going cost due to slope stabilisation and erosion management required. High sensitivity 4 0°-5° Preferred areas for any built infrastructure, lowest risk of erosion or instability, lowest construction and on-going maintenance costs. Lowest sensitivity 1 Substrate Vlok et al. (2008) vegetation map Mobile sands (e.g. drift sands) and beaches, and other loose sands corresponding to unstable, erosion-prone or mobile substrates are identified as sensitive features. Highest sensitivity 5 Flood risk (Hydrological) Areas at or below 5 m above sea level 5 m resolution DEM (courtesy Centre for Geographical Analysis, Stellenbosch University Highest sensitivity 5 Depressions Mapped by reserve staff (these need to be updated and verified in the field) Highest sensitivity 5 Within 200 m of a depression High sensitivity 4 Biodiversity Rivers 1: 50 000 NGI Rivers Within 200 m of perennial river Highest sensitivity 5 Within 100 m of non-perennial river Highest sensitivity 5 Wetlands NFEPA Wetland Highest sensitivity 5 Within 200 m of wetlands High sensitivity 4 Vegetation status (Conservation GRI vegetation map (Vlok et Critical (Sedgefield Sandplain Fynbos) Highest sensitivity 5 Endangered (Hartenbos Primary Dune, Groot Brak High 4
Goukamma-NRC_draft-PAMP-for-Public-Participation_18Jan2016.docx