dc.contributor.author |
Van Deventer, Heidi
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dc.contributor.author |
Van Niekerk, Lara
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dc.contributor.author |
Adams, J
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dc.contributor.author |
Dinala, MK
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dc.contributor.author |
Gangat, R
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dc.contributor.author |
Lamberth, SJ
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dc.contributor.author |
Lotter, M
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dc.contributor.author |
Mbona, N
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dc.contributor.author |
MacKay, F
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dc.contributor.author |
Nel, JL
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dc.contributor.author |
Ramjukadh, CL
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dc.contributor.author |
Skowno, A
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dc.contributor.author |
Weerts, Steven P
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dc.date.accessioned |
2020-03-24T09:04:18Z |
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dc.date.available |
2020-03-24T09:04:18Z |
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dc.date.issued |
2020-01 |
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dc.identifier.citation |
Van Deventer, H. et al. 2020. National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa. Water SA, vol. 46, no. 1, pp. 66-79 |
en_US |
dc.identifier.issn |
0378-4738 |
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dc.identifier.issn |
1816-7950 |
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dc.identifier.uri |
https://doi.org/10.17159/wsa/2020.v46.i1.7887
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dc.identifier.uri |
https://www.ajol.info/index.php/wsa/article/view/193149
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dc.identifier.uri |
http://hdl.handle.net/10204/11380
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dc.description |
Copyright 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
en_US |
dc.description.abstract |
The improved representation of freshwater and estuarine ecosystems and associated data was a key component of the 2018 National Biodiversity Assessment, and is an essential step in enhancing defensible land use planning and decision making. This paper reports on the enhancement of the National Wetland Map (NWM) version 5 for South Africa and other data layers associated with the South African Inventory of Inland Aquatic Ecosystems. Detail is provided on (i) the extent of wetlands mapped in NWM5, compared to previous versions of the NWMs; (ii) the improved extent of inland wetlands mapped in focus areas in NWM5 relative to NWM4; (iii) the type of cover associated with the wetlands (inundated, vegetated or arid); (iv) the ecotone between rivers and estuaries; and (v) level of confidence for the inland wetlands in terms of how well the extent and hydrogeomorphic units were captured for each sub-quaternary catchment of South Africa. A total of 4 596 509 ha (3.8% of South Africa) of inland aquatic ecosystems and artificial wetlands have now been mapped, with NWM5 delineating 23% more inland wetlands (2 650 509 ha or 2.2% of SA) compared with NWM4. The estuarine functional zone, which encapsulates all estuarine processes, and associated habitats and biota, was refined for 290 systems totalling 200 739 ha, with the addition of 42 micro-estuaries totalling 340 ha. Nearly 600 000 ha (0.5% of SA) of artificial wetlands were mapped in SA. Inland wetlands are predominantly palustrine (55%), with some arid (34%) and a few inundated systems (11%). Ecotones between rivers and estuaries, ecotones where biota and processes continuously vary from freshwater to estuarine, formed a small fraction (<1.5%) of river total extent (164 018 km). Most inland wetlands (~70%) had a low confidence ranking for designation of extent and typing, because they were not mapped by a wetland specialist and not verified in the field. Future improvements of the map should be focused on catchment-based improvements, particularly in strategic water-source areas, areas of high development pressure and those with low confidence designation. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Water Research Commission |
en_US |
dc.relation.ispartofseries |
Workflow;23372 |
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dc.subject |
Wetland inventory |
en_US |
dc.subject |
National Wetland Map |
en_US |
dc.subject |
Inland aquatic ecosystems |
en_US |
dc.subject |
Estuarine functional zone |
en_US |
dc.subject |
Macro estuaries |
en_US |
dc.subject |
Micro estuaries |
en_US |
dc.subject |
National Biodiversity Assessment |
en_US |
dc.subject |
Sustainable Development Goal |
en_US |
dc.subject |
SDG |
en_US |
dc.title |
National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Van Deventer, H., Van Niekerk, L., Adams, J., Dinala, M., Gangat, R., Lamberth, S., ... Weerts, S. P. (2020). National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa. http://hdl.handle.net/10204/11380 |
en_ZA |
dc.identifier.chicagocitation |
Van Deventer, Heidi, Lara Van Niekerk, J Adams, MK Dinala, R Gangat, SJ Lamberth, M Lotter, et al "National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa." (2020) http://hdl.handle.net/10204/11380 |
en_ZA |
dc.identifier.vancouvercitation |
Van Deventer H, Van Niekerk L, Adams J, Dinala M, Gangat R, Lamberth S, et al. National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa. 2020; http://hdl.handle.net/10204/11380. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Van Deventer, Heidi
AU - Van Niekerk, Lara
AU - Adams, J
AU - Dinala, MK
AU - Gangat, R
AU - Lamberth, SJ
AU - Lotter, M
AU - Mbona, N
AU - MacKay, F
AU - Nel, JL
AU - Ramjukadh, CL
AU - Skowno, A
AU - Weerts, Steven P
AB - The improved representation of freshwater and estuarine ecosystems and associated data was a key component of the 2018 National Biodiversity Assessment, and is an essential step in enhancing defensible land use planning and decision making. This paper reports on the enhancement of the National Wetland Map (NWM) version 5 for South Africa and other data layers associated with the South African Inventory of Inland Aquatic Ecosystems. Detail is provided on (i) the extent of wetlands mapped in NWM5, compared to previous versions of the NWMs; (ii) the improved extent of inland wetlands mapped in focus areas in NWM5 relative to NWM4; (iii) the type of cover associated with the wetlands (inundated, vegetated or arid); (iv) the ecotone between rivers and estuaries; and (v) level of confidence for the inland wetlands in terms of how well the extent and hydrogeomorphic units were captured for each sub-quaternary catchment of South Africa. A total of 4 596 509 ha (3.8% of South Africa) of inland aquatic ecosystems and artificial wetlands have now been mapped, with NWM5 delineating 23% more inland wetlands (2 650 509 ha or 2.2% of SA) compared with NWM4. The estuarine functional zone, which encapsulates all estuarine processes, and associated habitats and biota, was refined for 290 systems totalling 200 739 ha, with the addition of 42 micro-estuaries totalling 340 ha. Nearly 600 000 ha (0.5% of SA) of artificial wetlands were mapped in SA. Inland wetlands are predominantly palustrine (55%), with some arid (34%) and a few inundated systems (11%). Ecotones between rivers and estuaries, ecotones where biota and processes continuously vary from freshwater to estuarine, formed a small fraction (<1.5%) of river total extent (164 018 km). Most inland wetlands (~70%) had a low confidence ranking for designation of extent and typing, because they were not mapped by a wetland specialist and not verified in the field. Future improvements of the map should be focused on catchment-based improvements, particularly in strategic water-source areas, areas of high development pressure and those with low confidence designation.
DA - 2020-01
DB - ResearchSpace
DP - CSIR
KW - Wetland inventory
KW - National Wetland Map
KW - Inland aquatic ecosystems
KW - Estuarine functional zone
KW - Macro estuaries
KW - Micro estuaries
KW - National Biodiversity Assessment
KW - Sustainable Development Goal
KW - SDG
LK - https://researchspace.csir.co.za
PY - 2020
SM - 0378-4738
SM - 1816-7950
T1 - National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa
TI - National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa
UR - http://hdl.handle.net/10204/11380
ER -
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en_ZA |