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Controlling factors of sheet erosion under degraded grasslands in the sloping lands of KwaZulu-Natal, South Africa

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  • Dlamini, P.
  • Orchard, C.
  • Jewitt, G.
  • Lorentz, S.
  • Titshall, L.
  • Chaplot, V.

Abstract

The current increase in the global demand for food and fresh water and the associated land use changes or misuses exacerbate water erosion which has become a major threat to the sustainability of the soil and water resources. Soil erosion by rainfall and runoff is a natural and geologic phenomenon, and one of the most important components of the global geochemical cycle. Despite numerous studies on crop lands, there is still a need to quantify soil sheet erosion (an erosion form that uniformly removes fertile upper soil horizons) under grasslands and to assess the factors of the environment that control its spatial variation. For that purpose, fifteen 1 m2 micro-plots installed within a 23 ha catchment under pasture in the sloping lands of KwaZulu-Natal (South Africa) were monitored during the 2007-2008 rainy season to evaluate runoff (R) and sediment losses (SL). Soil losses computed from the 37 rainfall events with soil erosion averaged 6.45 ton ha-1 year-1with values from 3 to 13 ton ha-1 year-1. SL were significantly correlated with the proportion of soil surface coverage by the vegetation (PÂ

Suggested Citation

  • Dlamini, P. & Orchard, C. & Jewitt, G. & Lorentz, S. & Titshall, L. & Chaplot, V., 2011. "Controlling factors of sheet erosion under degraded grasslands in the sloping lands of KwaZulu-Natal, South Africa," Agricultural Water Management, Elsevier, vol. 98(11), pages 1711-1718, September.
    • Handle: RePEc:eee:agiwat:v:98:y:2011:i:11:p:1711-1718
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    1. Arjun M. Heimsath & William E. Dietrich & Kunihiko Nishiizumi & Robert C. Finkel, 1997. "The soil production function and landscape equilibrium," Nature, Nature, vol. 388(6640), pages 358-361, July.
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    1. Khatab Abdalla & Matthew Dickey & Trevor Hill & Bruce Scott‐Shaw, 2019. "Assessment of soil erosion under rainfed sugarcane in KwaZulu‐Natal, South Africa," Natural Resources Forum, Blackwell Publishing, vol. 43(4), pages 241-252, November.
    2. Emmanuel Tolulope Busayo & Ahmed Mukalazi Kalumba, 2020. "Coastal Climate Change Adaptation and Disaster Risk Reduction: A Review of Policy, Programme and Practice for Sustainable Planning Outcomes," Sustainability, MDPI, vol. 12(16), pages 1-16, August.
    3. Haytham M. Salem & Adil A. Meselhy, 2021. "A portable rainfall simulator to evaluate the factors affecting soil erosion in the northwestern coastal zone of Egypt," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 105(3), pages 2937-2955, February.
    4. Yonghua Zhao & Li Liu & Shuaizhi Kang & Yong Ao & Lei Han & Chaoqun Ma, 2021. "Quantitative Analysis of Factors Influencing Spatial Distribution of Soil Erosion Based on Geo-Detector Model under Diverse Geomorphological Types," Land, MDPI, vol. 10(6), pages 1-17, June.
    5. Kulasinghe, Tharindu Nuwan & Dharmakeerthi, Randombage Saman, 2022. "Effects of land use type and tank components on soil properties and sustainability of tank cascade system in the Dry Zone of north central Sri Lanka," Agricultural Systems, Elsevier, vol. 201(C).
    6. Saeed Sharafi & Mehdi Mohammadi Ghaleni & Deirdre Dragovich, 2023. "Simulated Runoff and Erosion on Soils from Wheat Agroecosystems with Different Water Management Systems, Iran," Land, MDPI, vol. 12(9), pages 1-16, September.
    7. Mander, Myles & Jewitt, Graham & Dini, John & Glenday, Julia & Blignaut, James & Hughes, Catherine & Marais, Christo & Maze, Kristal & van der Waal, Benjamin & Mills, Anthony, 2017. "Modelling potential hydrological returns from investing in ecological infrastructure: Case studies from the Baviaanskloof-Tsitsikamma and uMngeni catchments, South Africa," Ecosystem Services, Elsevier, vol. 27(PB), pages 261-271.

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