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Grid-Scale Impact of Climate Change and Human Influence on Soil Erosion within East African Highlands (Kagera Basin)

Author

Listed:
  • Chaodong Li

    (Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China)

  • Zhanbin Li

    (Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China)

  • Mingyi Yang

    (Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China)

  • Bo Ma

    (Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China)

  • Baiqun Wang

    (Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China)

Abstract

Under global climate change and pressure from human activities, soil erosion is becoming a major concern in the quest for regional sustainable development in the Kagera basin (KB). However, few studies in this region have comprehensively considered the impact of climate change and human influence on soil erosion, and the associated processes are unclear. Based on the premise of quantifying climate change, human influence, and soil erosion, this study undertook a neighborhood analysis as the theoretical support, for a grey relation analysis which was conducted to realize the qualitative assessment of the influence of climate change and human activities on soil erosion. The results show that 90.32% of the KB saw climate change as having a greater influence on soil erosion than human influence, with the remaining area 9.68% seeing human influence having a greater impact than climate change, mainly as a result of the effect of rangeland and farmland. The average soil erosion rate of the KB shows a very low level (10.54 t ha −1 yr −1 ), with rangeland and farmland being the main land use/land cover (LULC) types that see soil loss, followed by forest, wetland, and built-up areas. The climate change trends of the KB show the most dramatic changes in the northeast and southwest, gradually decreasing towards the line crossing from the Birunga National Park (Rwanda) to the Keza district (Tanzania). The human influence intensity (HII) shows a high level in the KB (21.93), where it is higher in the west and lower in the east of the basin.

Suggested Citation

  • Chaodong Li & Zhanbin Li & Mingyi Yang & Bo Ma & Baiqun Wang, 2021. "Grid-Scale Impact of Climate Change and Human Influence on Soil Erosion within East African Highlands (Kagera Basin)," IJERPH, MDPI, vol. 18(5), pages 1-17, March.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:5:p:2775-:d:513685
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    References listed on IDEAS

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