coaltech upper olifants river catchment wetland inventory ...

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This report defined wetlands according to the definition included in the National Water Act. We chose this definition, since it is the wetland definition applicable in South African legislation and most commonly used in South Africa. Artificial wetlands, not included in the DWAF definition, have also been included in this report in addition to the natural wetlands, since artificial wetlands can also perform a number of functions. The project was divided into two phases. The first phase of the project included: o Literature collection and review, o Data capturing, o Wetland mapping, o Gap analysis, and o Report compilation. This first phase of the project commenced in July 2005 and continued until the end of June 2006. The second phase of the project included: o Site verification of wetlands throughout the catchment, o Site verification of wetlands on mining properties, o Comparison of the final Landcover wetland layer (completed June 2006) with the final UORC wetland database, and o Collection and review of additional information from the mines. The second phase of the project commenced in July 2006 and concluded in October 2006. 2. OBJECTIVES OF THE STUDY The objectives of the study are to include all the available data on the wetlands of the UORC into one comprehensive database and to compile a literature review of all wetland literature available for the catchment. The literature review incorporates all the available information on the wetlands in the UORC, as well as some general wetland information. The literature review aims to provide a general overview of the wetland types occurring in the UORC and their possible functions and threats. Wetland Database for UORC - 14 -
The aim of the wetland layer is to provide a baseline database of the wetlands in the area. The layer is only intended as a baseline to give an indication of what to expect and cannot replace site-specific wetland assessments. The layer should not be used to determine buffer zones around the wetlands, since not all wetland boundaries have not been delineated on site. 3. LITERATURE REVIEW 3.1 Introduction Literature currently available on wetlands in the UORC, as well as general information on wetlands, has been collected and included in this review. Tertiary institutions (such as Universities and Technikons), Government Departments, Research Institutions (such as the CISR, the Council for Geoscience and the Water Research Commission), and mines were contacted to obtain any information available on the wetlands located within the UORC. 3.2 Geology and soils associated with wetland distribution 3.2.1 Geology Various studies in the past have indicated that there is a relationship between wetland distribution, and the underlying geology and soils (Grundling & Marneweck 2001, Cirmo 2003, Merot et al 2003, Devito et al 1996). The geology of a site influences several of the topographical characteristics of the site, as well as erosion processes, groundwater and vegetation type. According to Palmer et al (2002) most of the wetlands in the UORC occur on sediments from the Vryheid Formation, with a few on the Waterberg Group, Dwyke Formation and the least on the Rooiberg Group, Bushveld Complex. Wetlands are also strongly associated with dolerite intrusions (Snyman 1998, Vegter 1995). Wetland Database for UORC - 15 -
Page 1 and 2: COALTECH UPPER OLIFANTS RIVER CATCH
Page 3 and 4: The following aspects are included
Page 5 and 6: The most common wetland types in th
Page 7 and 8: The attributes allocated based on t
Page 9 and 10: 6. DATABASE CONSTRAINTS............
Page 11 and 12: Addendums Addendum A - Plant specie
Page 13: Figure 1. Extent of the UORC (refer
Page 17 and 18: 3.3 Wetland biodiversity Wetlands p
Page 19 and 20: Table 1: Species of concern Species
Page 21 and 22: Species name Common name Hottentot
Page 23 and 24: Species name Common name Cordylus g
Page 25 and 26: 3.3.2 Birds Various bird species ut
Page 27 and 28: 3.3.6 Fish The UORC has a low diver
Page 29 and 30: Figure 2. Schematic illustration of
Page 31 and 32: 3.4.1.2 Floodplain riparian Floodpl
Page 33 and 34: 3.4.4 Other non-riparian wetlands O
Page 35 and 36: 3.5.1.2 Groundwater recharge Variou
Page 37 and 38: More important in the removal of me
Page 39 and 40: The flow velocity in the channel of
Page 41 and 42: The most important fishing activity
Page 43 and 44: 3.5.6.3 Livestock Diseases Various
Page 45 and 46: 3.6.2 Mining and Quarrying There is
Page 47 and 48: • Dwars-in-die-wegspruit at the l
Page 49 and 50: 3.6.4 Burning Wetlands are burnt on
Page 51 and 52: 3.6.9 Alien Fauna and Flora 3.6.9.1
Page 53 and 54: Category 3 plant invaders are plant
Page 55 and 56: o The Fish Assemblage Integrity Ind
Page 57 and 58: Figure 4. The ecoregions of the Oli
Page 59 and 60: Sixteen fish species (four of which
Page 61 and 62: Figure 5. Extent of the UORC accord
Page 63 and 64: 3.9 Common wetland types in UORC Ac
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In a wetland assessment conducted a
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In a wetland study at Douglas Colli
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Figure 8. Status of assessed wetlan
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Figure 9. Portion of the wetland la
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Figure 11. Portion of the water bod
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Figure 13. Portion of the separated
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Figure 15. Portion of the wetland l
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Since the field verification site v
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Figure 18. Portion of the final wet
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Upon a request from DWAF the status
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5.8 Functions The functions likely
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5.11 Wetland types The entire catch
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6. DATABASE CONSTRAINTS The greates
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Figure 21. The wetland in the UORC
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8.2 Mapping o Small wetlands (of le
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The attributes in the attribute tab
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10. REFERENCES Abbott Grobicki (Pty
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Goudie, A.S. & Thomas, D.S.G. 1985.
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Merot, P., Squividant, H., Aurousse
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Wilson, R.T. 2003. Animal health an
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Addendum A - Plan species list Wetl
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var. lachnantha Lamiaceae Ajuga oph
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Asteraceae Berkheya onopordifolia B
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Poaceae Chloris pycnothrix Chloroph
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Poaceae Boraginaceae incompletus Cy
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Poaceae Echinochloa cruspavonis * *
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Asteraceae Gamochaeta subfalcata Y
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Sterculiaceae Sterculiaceae Poaceae
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Cyperaceae Kyllinga erecta Kyllinga
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Asteraceae Nidorella anamola Nympho
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Polygonaceae Apiaceae Poaceae Apiac
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Brassicaceae Rorippa nudiuscula * *
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Poaceae Setaria verticillata * Malv
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Asteraceae Ursinia nana * * * Lenti
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Addendum B - Mammal species list We
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Cynictis Yellow Carnivora penicilla
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Addendum C - Bird species list Wetl
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Actitis hypoleucos Actophilornis Co
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Ceryle rudis Nectarinia Pied Kingfi
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Eremopterix verticalis Estrilda ast
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Netta erythrophthalma Numida meleag
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Spizocorys conirostris Pinkbilled L
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Addendum D - Reptile species list W
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Elapidae Naja haje Egyptian cobra X
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Group Species name Common name Pipi
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Addendum F - Fish species list Wetl
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Austroglansis sclateri X X Barbus a
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Phylum Group Species name Common na
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Arachnida Tanycypris obtusa Hydroze
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gibba Daphnia pulex Simocephalus ca
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Ischnura senegalensis Pseuddgrion s
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Micronecta sp. Micronecta piccanin
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Hydraenidae Hydrophilida e Berosus
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MOLLUSCA Simulium adersi Simulium ?
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