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<p>Water erosion, caused by water acting on soils, leads to the transport of sediments and can contaminate waterways, thereby harming hydraulic infrastructures and the quality of water for humans and ecosystems. An effective understanding of this phenomenon requires the use of reliable and accurate tools. The objective of this study validate flow estimates as well as assess the soil erosion potential in the watershed of the Sanaga water intake at Nachtigal. The results of the SWAT modeling demonstrate its ability to accurately reproduce the temporal variations of flows. Moreover, the model proves to be effective in identifying the areas of the watershed most exposed to erosion. Soil loss rates vary from 0.7 to 27 t/ha/year, with an average of 10.41 t/ha/year. This rate is more pronounced in areas where steep slopes are combined with agricultural zones. This model provides a rigorous framework for prioritizing soil conservation interventions by identifying critical areas of the watershed and assessing the impact of different management practices on erosion dynamics. To reduce soil erosion in this watershed, it is advisable to implement conservation practices, particularly direct seeding and soil conservation agriculture. It is imperative to establish protection zones around hydraulic structures to prevent any contamination and ensure their proper functioning.</p>

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Modeling hydrological and erosional processes using the SWAT model in the Sanaga River potable water intake catchment at Nachtigal, Cameroon

  • 期刊论文

  • 发表日期：

    2025年3月12日

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  • Henri Zobo Mbele,
  • Jules Remy Ndam Ngoupayou,
  • Zakari Mfonka,
  • Daouda Nsangou,
  • Chouaibou Ngnatcha Yende,
  • Amidou Kpoumie,
  • Joachim Etouna

摘要

Water erosion, caused by water acting on soils, leads to the transport of sediments and can contaminate waterways, thereby harming hydraulic infrastructures and the quality of water for humans and ecosystems. An effective understanding of this phenomenon requires the use of reliable and accurate tools. The objective of this study validate flow estimates as well as assess the soil erosion potential in the watershed of the Sanaga water intake at Nachtigal. The results of the SWAT modeling demonstrate its ability to accurately reproduce the temporal variations of flows. Moreover, the model proves to be effective in identifying the areas of the watershed most exposed to erosion. Soil loss rates vary from 0.7 to 27 t/ha/year, with an average of 10.41 t/ha/year. This rate is more pronounced in areas where steep slopes are combined with agricultural zones. This model provides a rigorous framework for prioritizing soil conservation interventions by identifying critical areas of the watershed and assessing the impact of different management practices on erosion dynamics. To reduce soil erosion in this watershed, it is advisable to implement conservation practices, particularly direct seeding and soil conservation agriculture. It is imperative to establish protection zones around hydraulic structures to prevent any contamination and ensure their proper functioning.