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Botanical Impact Assessment Report Specialist Study BOTANICAL IMPACT ASSESSMENT REPORT SPECIALIST STUDY July 2015 Prepared by: Dizolux CC PO Box 27100 Monument Park Pretoria 0105 446 Cameron Street Brooklyn Pretoria 0181 Tel: 012 346 3111 Fax: 012 346 3444 Email: [email protected] Website: www.izimbali.co.za Authors: Therèsè Rautenbach B.Sc. (Hons) Botany, M.Sc. Zoology, (Cand.Sci.Nat. Reg. no. 100055/13: Botanical Science) Istvan Ferenc Babinszky BA (Law), LLB, LLM Environmental Law Nicole Upton B.Sc. Environmental Management Email: [email protected] / [email protected] 2 TABLE OF CONTENTS DISCLAIMER............................................................................................................................. 6 DECLARATION OF INTEREST ................................................................................................ 7 SCOPE OF WORK .................................................................................................................... 9 EXECUTIVE SUMMARY ..........................................................................................................13 DEFINITIONS AND TERMINOLOGY .......................................................................................14 1. INTRODUCTION ...............................................................................................................16 2. SITE DESCRIPTION .........................................................................................................17 2.1. Location .....................................................................................................................17 2.2. Terrain .......................................................................................................................19 2.3. Climate .......................................................................................................................19 3. METHODS .........................................................................................................................19 3.1. Literature study .........................................................................................................19 3.2. Site investigation ......................................................................................................20 3.3. Analysis .....................................................................................................................21 3.4. Assumptions and limitations ...................................................................................21 4. RESULTS ..........................................................................................................................22 4.1. Vegetation units ........................................................................................................22 4.1.1. Sekhukhune Plains Bushveld ...............................................................................24 4.1.2. Sekhukhune Mountain Bushveld .........................................................................25 4.2. Land Cover ................................................................................................................26 4.3. Conservation .............................................................................................................28 4.4. Description of existing vegetation units .................................................................30 4.4.1. Plains Bushveld .................................................................................................30 4.4.2. Mountain Bushveld ............................................................................................32 4.4.3. Rocky Outcrop ...................................................................................................34 4.4.4. Riparian Vegetation ...........................................................................................35 4.4.5. Erosion Donga ...................................................................................................39 4.4.6. Cultivated Land ..................................................................................................40 4.4.7. Built Environments ............................................................................................42 4.5. Species of Special Concern .....................................................................................43 3 4.6. Alien and invasive species ..........................................................................................47 5. SENSITIVITY ANALYSIS ..................................................................................................48 6. IMPACT ASSESSMENT ....................................................................................................53 6.1. Impact identification .................................................................................................53 6.2. Impact prediction and evaluation ............................................................................54 6.3. Mitigation measures and management options ......................................................57 6.3.1. Habitat destruction ............................................................................................58 6.3.2. Clearing and disturbance of natural vegetation ..............................................58 6.3.3. Soil disturbance .................................................................................................61 6.4. Monitoring .................................................................................................................62 7. PROJECT OPTIONS .........................................................................................................63 8. CONCLUSION ...................................................................................................................64 APPENDIX ...............................................................................................................................68 List of Figures Figure 1: Provides the proposed location of the Eskom development. 18 Figure 2: Provides the vegetation types present in the study area. 23 Figure 3: Depicts the land cover associated with the study area. 27 Figure 4: The location of the Critical Biodiversity Areas relevant to the project. 29 Figure 5: Provides a view of plains bushveld vegetation. 31 Figure 6: Provides a view of mountain bushveld vegetation. 33 Figure 7: Provides an example of a rocky outcrop vegetation. 34 Figure 8: Provides examples of riparian vegetation. 37 Figure 9: Provides examples of erosion donga vegetation. 39 Figure 10: Provides examples of cultivated land. 41 Figure 11: Provides a general view of the northern section of the proposed route. 42 Figure 12: Provides an indication of sensitive areas along the proposed routes. 52 4 List of Tables Table 1: Summary of the common species present in Plains Bushveld vegetation. 24 Table 2: Summary of the common species present in Mountain Bushveld vegetation. 25 Table 3: Provides common species in the plains bushveld vegetation unit. 31 Table 4: Provides species observed in the mountain bushveld vegetation unit. 33 Table 5: Provides species observed on a rocky outcrop next to the proposed route. 35 Table 6: Provides some of the species observed in the riparian vegetation unit. 38 Table 7: Provides some of the species that were observed in erosion dongas. 40 Table 8: Provides some of the species that were observed on cultivated land. 42 Table 9: List of threatened and protected species in the study area. 44 Table 10 Provides the alien species expected and confirmed on site. 47 Table 11: Provides the floristic sensitivity summary for each vegetation type. 49 Table 12: Sensitivity comparison for the vegetation types in the study area. 50 Table 13: The habitat condition for the power line and substation alternatives. 51 Table 14: Provides the impact analysis for Alternative Route 1. 55 Table 15: Provides the impact analysis for Alternative Route 2. 56 Table 16: Provides the impact analysis for the substation. 57 Table 17: Species list for all the identifiable taxa observed in the study area. 68 5 DISCLAIMER The shareholders, employees and professional consultants of Dizolux CC hereby declare that random sampling methods of the study area and structured scientific observations were used in the compilation of this report. This study does not encompass detailed investigations relating to future changes in biodiversity and attributes other than the time during which this project was conducted. All descriptions, results and/or findings, recommendations and conclusions contained in this report are treated with confidentiality. Dizolux CC shall not be held liable for any ambiguous findings concluded from this scientific assessment, as requested for the purpose of this report. Dizolux CC further reserves the right to alter (at any stage) the content of this report including, but not limited to the recommendations and conclusions, should any relevant and/or significant findings become evident in any capacity or form. Also take note that a survey of the entire route could not be conducted as a result of time and budget constraints. Sensitive areas were thus identified during the desktop study, and representative sites were visited to ground truth the sensitivity and identify the species present in these areas. Identification of inconspicuous sites such as small non-perennial streams may therefore have been overlooked, but should be taken into account during the planning phase. The shareholders, employees and professional consultants of Dizolux CC can, as a result
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