Wetland areas, despite their socioeconomic and environmental importance, are being invaded for development as the population grows, especially in areas challenged by water availability, like in the North-Eastern parts of South Africa. This area is made up of important wetland ecosystems with a coverage of 240 km2, involving the Kruger National Park. Through the Random Forest (RF) algorithm with satellite images, the LULC impacts were evaluated on this wetland. The analysis of satellite-derived maps with an accuracy performance range of 85–90% revealed a considerable loss in wetland coverage, with noticeable transitions into built-up areas and other vegetation types (bush encroachment). The wetland area declined by 82.54% between 1993 and 2023, indicating significant anthropogenic impacts, with the proportion of built-up areas increasing drastically by more than threefold to indicate a growth of 260.74%, while the other vegetation (including bushes, shrubs, small trees, grasses, and herbaceous vegetation) increased by 58.70%. These results emphasized the need to implement integrated land use planning strategies that could strike a balance between development and conservation efforts. However, a proper understanding of the complex relationships that occur within wetland ecosystems and coordinated efforts to mitigate threats posed by both natural and man-made factors are necessary for effective management of this important resource.

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Evaluating the Impacts of Land Use and Land Cover Changes on Maungani Wetland Ecosystem in South Africa

  • Matimba Mashele,
  • Adeline Ngie

摘要

Wetland areas, despite their socioeconomic and environmental importance, are being invaded for development as the population grows, especially in areas challenged by water availability, like in the North-Eastern parts of South Africa. This area is made up of important wetland ecosystems with a coverage of 240 km2, involving the Kruger National Park. Through the Random Forest (RF) algorithm with satellite images, the LULC impacts were evaluated on this wetland. The analysis of satellite-derived maps with an accuracy performance range of 85–90% revealed a considerable loss in wetland coverage, with noticeable transitions into built-up areas and other vegetation types (bush encroachment). The wetland area declined by 82.54% between 1993 and 2023, indicating significant anthropogenic impacts, with the proportion of built-up areas increasing drastically by more than threefold to indicate a growth of 260.74%, while the other vegetation (including bushes, shrubs, small trees, grasses, and herbaceous vegetation) increased by 58.70%. These results emphasized the need to implement integrated land use planning strategies that could strike a balance between development and conservation efforts. However, a proper understanding of the complex relationships that occur within wetland ecosystems and coordinated efforts to mitigate threats posed by both natural and man-made factors are necessary for effective management of this important resource.