Gully erosion susceptibility modelling to support avoided degradation planning
Bibliographic Data
| ID | 21540656 |
|---|---|
| Authors | Jay le Roux (0000-0001-5660-2666, University of the Free State, corresponding author), Bennie van der Waal (0000-0002-4146-8780, University of the Free State) |
| Year | 2020 |
| Volume | 102 |
| Issue | 3 |
| Pages | 406-420 |
| Publication date | 2020-09-01 |
| Peer Reviewed | Yes |
| Open Access | No |
| Type | ARTICLE |
| Venue | South African Geographical Journal (JOURNAL) |
| Journal identifiers | ISSN: 0373-6245 • E-ISSN: 2151-2418 |
| Publisher | Informa UK Limited (PUBLISHER • GB) |
| DOI | 10.1080/03736245.2020.1786444 |
| OpenAlex | W3039523466 |
| Language | EN |
| Citations received | 3 |
| References cited | 35 |
Restoration resources are usually limited and strategic information on and erosion susceptible areas are required to avoid further degradation. This study has potential in the Mzimvubu River Catchment, South Africa, where two large reservoirs are planned on the Tsitsa tributary. The Tsitsa River Catchment, however, consists of highly erodible soils with widespread gully erosion evident. It is important to prevent further gully erosion in the catchment due to the presence of duplex and dispersive soils. Therefore, this study modelled areas that are susceptible to gully development in the Tsitsa River Catchment, as well as estimated the sediment yield potential from the susceptible areas if gully development occurs. This was achieved by mapping gully-free areas in a GIS that have the same DEM-derived topographical variables, soil associations and land cover as gullied areas, followed by scenario analysis of the potential sediment yield. More than 30 000 ha (7%) of the catchment is intrinsically susceptible to further gully development, consisting of drainage paths with a large contributing area and erodible duplex soils. If not protected, these susceptible areas could contribute an additional 300 million m3 of sediment to the river network, reducing the volumes of both reservoirs by more than 50
Drainage · Drainage basin · Erosion · Geography · Geomorphology · Gully Erosion · Land degradation · Land use · Sediment · Soil water · Surface runoff · Tributary · Environmental Science · Hydrology and Sediment Transport Processes · Hydrology and Watershed Management Studies · Soil erosion and sediment transport · Ecology · Geology · Soil Science
| Unique citing works | 3 |
|---|---|
| Citations per year | 0,6 |
| Citation span | 2021 - 2024 (4) |
| Citation velocity | recent |
| Highly cited | No |
| Citation types | Neutral: 2 |