BEN SCHOEMAN DOCK BERTH DEEPENING Specialist ... - Transnet

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ABBREVIATIONS AND GLOSSARY Acute toxicity Anoxia Ballast water Benthic Benthos Biodiversity Biofouling Biota Bivalve Chronic toxicity CMS Community structure Community Contaminant DEAT/MCM Demersal Depauperate Detritus EC 50 (median effective concentration) EC 5 (minimum effective concentration) Rapid adverse effect (e.g. death) caused by a substance in a living organism. Can be used to define either the exposure or the response to an exposure (effect) The absence of oxygen Use of water in specialised ballast tanks to aid in controlling a ship's trim and draft, especially when sailing empty or with light cargoes Referring to organisms living in or on the sediments, including rocks and reefs of aquatic habitats (seas, oceans, lakes, rivers, ponds, etc.) The sum total of organisms living in, or on, the sediments of aquatic habitats. The variety of life forms, including the plants, animals and micro-organisms, the genes they contain and the ecosystems and ecological processes of which they are a part Biological organisms that colonise and inhabit man made structures in oceans and seas The sum total of the living organisms of any designated area. A mollusc with a hinged double shell Lingering or continuing for a long time. Can be used to define either the exposure of an aquatic species or its response to an exposure (effect). Centre for Marine Studies, University of Cape Town All the types of taxa present in a community and their relative abundance. An assemblage of organisms characterized by a distinctive combination of species occupying a common environment and interacting with one another Biological (e.g. bacterial and viral pathogens) and/or chemical introductions capable of producing an adverse response (effect) in a biological system, seriously affecting structure or function or causing death. Marine and Coastal Management Directorate, Department of Environmental Affairs and Tourism Animals that live on or near the seabed Impoverished in species and/or biomass Unconsolidated sediments composed of both inorganic and dead and decaying organic material. The concentration of material in water that is estimated to be effective in producing some chronic response in 50% of the test organisms. The EC 50 is usually expressed as an exposure time-dependant value (e.g. 96-hour EC 50 ). The concentration of material in water that is estimated to be effective in producing some chronic response in 5% of i
the test organisms. The EC 5 is usually expressed as an exposure time-dependant value (e.g. 96-hour EC 5 ). Effluent EIA Endemic Epifauna Epi-pelagic Eutrophication Guideline trigger values Habitat Hopper Hopper overwash Ichthyoplankton Infauna IUCN Keystone species LC 50 (median lethal concentration) LC 5 (minimum lethal concentration) Low water neaps Macrobenthos Macrofauna Macrophyte A complex waste material (e.g. liquid industrial discharge or sewage) that may be discharged into the environment Environmental Impact Assessment Biological species or taxon restricted to a particular geographic area Organisms, which live at or on the sediment surface being either attached (sessile) or capable of movement The upper levels of the oceans and seas Enrichment with plant nutrients (nitrogen, phosphorus, silicates) that may cause excessive algal growth Concentrations (or loads) of the key performance indicators measured for the ecosystem, below which there exists a low risk that adverse biological (ecological) effects will occur. They indicate a risk of impact if exceeded and should ‘trigger’ some action, either further ecosystem specific investigations or implementation of management/remedial actions. The place where a population (e.g. animal, plant, microorganism) lives and its surroundings, both living and nonliving Tank on a dredger that receives and contains dredge spoil The practice of allowing low concentration sediment slurry to flow overboard allowing the build up of more concentrated slurries in the hopper Fish, fish larvae and fish eggs in the plankton Animals of any size living within the sediment. They move freely through interstitial spaces between sedimentary particles or they build burrows or tubes. International Union for Conservation of Nature and Natural Resources Species that are important in structuring communities of species or in ecological processes The concentration of material in water that is estimated to be lethal to 50% of the test organisms. The LC 50 is usually expressed as an exposure time-dependant value (e.g. 96- hour LC 50 ). The concentration of material in water that is estimated to be lethal to 5% of the test organisms. The LC 5 is usually expressed as an exposure time-dependant value (e.g. 96- hour LC 5 ). Neap low tide level Biological organisms >1mm living on or in sediments and rocks in aquatic environments Animals >1 mm A member of the macroscopic plant life of an area, especially of a body of water; large aquatic plant ii
Page 1: BEN SCHOEMAN DOCK BERTH DEEPENING S
Page 5 and 6: Turbidity Upwelling Vulnerable Wrac
Page 7 and 8: Another important issue is the poss
Page 9 and 10: 6.2.1.3 Settlement of material susp
Page 11 and 12: 2 METHODOLOGY For the assessment tw
Page 13 and 14: The proposed deepening of the Ben S
Page 15 and 16: 4.3 Cumulative effects Table Bay re
Page 17 and 18: undetectable in 80% of the measurem
Page 19 and 20: 5.1.3 Biological communities The ma
Page 21 and 22: Supralittoral fringe (Littorina zon
Page 23 and 24: Niambia sp. Coleoptera Diptera Tylo
Page 25 and 26: Midlittoral zone - The intertidal o
Page 27 and 28: Fish - Nearshore and in the sandy b
Page 29 and 30: 2000 at Robben Island revealed furt
Page 31 and 32: Table 2: Common whales and dolphins
Page 33 and 34: Table 3: Site, time, mean count (co
Page 35 and 36: 150000 125000 100000 Kg 75000 50000
Page 37 and 38: sensitive because of its conservati
Page 39 and 40: Schoeman Dock occurred in 1971 (Pro
Page 41 and 42: Table 7: Hydrocarbon distributions
Page 43 and 44: care concentration ranges for cadmi
Page 45 and 46: SS mg/l Boxplot for TSS 80 60 40 20
Page 47 and 48: The mean values calculated above ar
Page 49 and 50: o o possibility of the dredge spoil
Page 51 and 52: The gravel sized component of the s
Page 53 and 54:
Table 12a: London Convention Annex
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Benthos distributions in Block #1 -
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40 40 30 Site 1A 30 Site 1B % Speci
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2 Cluster Dendrogram and MDS ordina
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the well developed ripples in the c
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6 IMPACT IDENTIFICATION AND ASSESSM
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Accordingly the potential environme
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Impact Assessment Table No Mitigati
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are summarised in the table and it
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Figure 21b: Predicted number of day
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considered to be low. Further, the
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A A B B B Figure 23a and b: Predict
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dependent on these include the harm
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structures. The apparent lack of su
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Diving birds such as cape cormorant
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Figure 24: The predicted worst case
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Figure 25 depicts the simulation mo
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6.2.3.2 Alteration of benthic biolo
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Impact Assessment Table No Mitigati
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Nature of impact - Turbid plumes of
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Figure 26b: Predicted worst case ex
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Figure 27b: Predicted worst case ex
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suspended sediment concentrations i
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Figure 28a: Dredge spoil dump site
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6.2.3.6 Elevated water column turbi
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The evaluation with mitigation is:
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Figure 29a: Predicted exceedance in
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6.3 Cumulative Impacts The proposed
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Impact summary Table (cont.) Impact
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Impact summary Table (cont.) Impact
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mitigated by ensuring that the Cutt
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operations at Coega Port. Prepared
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Glassom D., K. Prochazka and G.M. B
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Protekon 2006. Port of Cape Town co
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BEN SCHOEMAN DOCK BERTH DEEPENING Specialist ... - Transnet

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