Scholarlink

The present study assessed and estimated soil erosion in the Gomukhi Watershed using the Revised Universal Soil Loss Equation (RUSLE) model integrated with geospatial techniques in a Geographic Information System (GIS) environment. The watershed is located in the semi-arid region of Kallakurichi district, Tamil Nadu, India. Soil erosion was estimated based on five key factors: annual average rainfall (R-factor), slope length and steepness (LS-factor), soil erodibility (K-factor), crop management (C-factor), and support conservation practices (P-factor).These parameters were calculated and integrated using GIS, and the RUSLE model was applied in the form A = R × K × LS × C × P. The analysis revealed that the northwestern region of the watershed experiences high to severe erosion, with estimated soil loss ranging from 13.44 to 20.97 t ha−1 yr−1, covering approximately 255.11 km2. This corresponds to areas with steep (10–15%) and very steep (> 15%) slopes.In contrast, the southern basin with gentle (3–5%) to nearly level (< 3%)slopes showed lower erosion rates, below 2 t ha−1 yr−1. Sub-watershed boundaries were overlaid with erosion hazard layers to delineate risk zones. The study area was categorized into five erosion hazard classes: low, moderate, high, very high, and severe. The resulting erosion hazard map serves as a valuable tool for block- and district-level planning, enabling the implementation of targeted soil and water conservation strategies to promote sustainable land and resource management.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Geospatial Approach; Identification of Soil Erosional Hazards Zone and Prioritizations of Gomukhi Watershed at Tamil Nadu State, India; Through RUSLE Model

  • 章节

  • 发表日期：

    2025年

查看全文
  • V. Govindaraj,
  • C. Lakshuman,
  • M. Mythili

摘要

The present study assessed and estimated soil erosion in the Gomukhi Watershed using the Revised Universal Soil Loss Equation (RUSLE) model integrated with geospatial techniques in a Geographic Information System (GIS) environment. The watershed is located in the semi-arid region of Kallakurichi district, Tamil Nadu, India. Soil erosion was estimated based on five key factors: annual average rainfall (R-factor), slope length and steepness (LS-factor), soil erodibility (K-factor), crop management (C-factor), and support conservation practices (P-factor).These parameters were calculated and integrated using GIS, and the RUSLE model was applied in the form A = R × K × LS × C × P. The analysis revealed that the northwestern region of the watershed experiences high to severe erosion, with estimated soil loss ranging from 13.44 to 20.97 t ha−1 yr−1, covering approximately 255.11 km2. This corresponds to areas with steep (10–15%) and very steep (> 15%) slopes.In contrast, the southern basin with gentle (3–5%) to nearly level (< 3%)slopes showed lower erosion rates, below 2 t ha−1 yr−1. Sub-watershed boundaries were overlaid with erosion hazard layers to delineate risk zones. The study area was categorized into five erosion hazard classes: low, moderate, high, very high, and severe. The resulting erosion hazard map serves as a valuable tool for block- and district-level planning, enabling the implementation of targeted soil and water conservation strategies to promote sustainable land and resource management.