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Soil erosion is the gradual wearing away of soil by wind, water, or ice. It can be a natural process, but human activities like deforestation and overgrazing can accelerate it. Soil erosion is a serious environmental risk in the Eastern Ghats, India, which is further heightened by human interventions such as deforestation and overgrazing. In this study, multi-criteria decision-making (MCDM) methods was used to analyse and rank soil erosion risk areas. The analysis integrates seven key factors: slope, elevation, slope length, land use/land cover, soil type, rainfall intensity, and Normalized Difference Vegetation Index (NDVI). Using the analytical hierarchy process (AHP), a soil erosion susceptibility map was developed, categorizing watershed sensitivity into five levels: extremely high, high, moderate, low, and extremely low. The results highlight the geographical distribution of soil erosion risk in the Kadavur Basin, Tamil Nadu; approximately 30% of the area is classified as having high to extremely high susceptibility, primarily due to steep slopes and heavy rainfall, and the result has a validation of high satisfactory accuracy 0.86%. This study equips policymakers and land managers with essential information to adopt sustainable land-use practices and counteract the negative impacts of soil erosion as well as the loss of biodiversity. Through an identification of these vulnerable areas, specific interventions are created to promote effective management of natural resources while minimizing environmental degradation.

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Assessing and Identifying the Soil Erosion-Prone Areas Using Multi-criteria Decision-Making Model and GIS Techniques in Kadavur Watershed, Central Part of Tamil Nadu, India

  • 章节

  • 发表日期：

    2026年

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  • S. P. Dhanabalan,
  • R. Jegankumar,
  • B. Balakumar,
  • R. S. Libina,
  • M. A. Arya

摘要

Soil erosion is the gradual wearing away of soil by wind, water, or ice. It can be a natural process, but human activities like deforestation and overgrazing can accelerate it. Soil erosion is a serious environmental risk in the Eastern Ghats, India, which is further heightened by human interventions such as deforestation and overgrazing. In this study, multi-criteria decision-making (MCDM) methods was used to analyse and rank soil erosion risk areas. The analysis integrates seven key factors: slope, elevation, slope length, land use/land cover, soil type, rainfall intensity, and Normalized Difference Vegetation Index (NDVI). Using the analytical hierarchy process (AHP), a soil erosion susceptibility map was developed, categorizing watershed sensitivity into five levels: extremely high, high, moderate, low, and extremely low. The results highlight the geographical distribution of soil erosion risk in the Kadavur Basin, Tamil Nadu; approximately 30% of the area is classified as having high to extremely high susceptibility, primarily due to steep slopes and heavy rainfall, and the result has a validation of high satisfactory accuracy 0.86%. This study equips policymakers and land managers with essential information to adopt sustainable land-use practices and counteract the negative impacts of soil erosion as well as the loss of biodiversity. Through an identification of these vulnerable areas, specific interventions are created to promote effective management of natural resources while minimizing environmental degradation.