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<p>Anthropogenic activities are increasingly altering geomorphic systems, often exceeding the influence of natural processes. Assessing the extent of this Anthropogeomorphic Pressure (AGP) is essential for mitigating its adverse effects on landscapes. This study introduces the Nigam-Kotha Model of Anthropogeomorphic Impact at Ecumene (AGI@E), a novel, holistic approach developed using interdisciplinary variables spanning human and physical geography. The model quantitatively assesses AGP using ten variables, including socioeconomic, demographic, geomorphometric, climatic, and natural hazard factors. It uniquely differentiates between anthropogenic pressure and natural erosion susceptibility, providing a dual-impact profile for ecumene regions. A case study in four sub-districts of coastal South Goa—Marmugao, Salcete, Quepem, and Canacona—was conducted for model validation, covering the period from AD 2000 to 2020. Results revealed markedly higher AGI@E values in Marmugao (338.77 in 2000; 229.44 in 2020) and Salcete (358.34 in 2000; 290.80 in 2020), indicating intensive anthropogenic influence, coinciding with rapid urban and industrial development. In contrast, Quepem and Canacona displayed significantly lower values (Quepem: 85.10 to 103.84; Canacona: 73.40 to 76.29), suggesting relatively stable geomorphic conditions with limited human interference. Extensive field surveys, satellite data, and historical development trends corroborated these outcomes. The AGI@E model effectively identifies and quantifies geomorphic stress in human-dominated landscapes, making it a valuable tool for regional planning and environmental management. However, its applicability is currently limited to ecumene zones, necessitating caution when extrapolating beyond inhabited regions.</p>

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A novel and holistic model to quantify the impact of anthropogeomorphic process in any ecumene: a multi-temporal case study of coastal tracts of South Goa district, India

  • 期刊论文

  • 发表日期：

    2025年10月9日

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  • Ritwik Nigam,
  • Mahender Kotha

摘要

Anthropogenic activities are increasingly altering geomorphic systems, often exceeding the influence of natural processes. Assessing the extent of this Anthropogeomorphic Pressure (AGP) is essential for mitigating its adverse effects on landscapes. This study introduces the Nigam-Kotha Model of Anthropogeomorphic Impact at Ecumene (AGI@E), a novel, holistic approach developed using interdisciplinary variables spanning human and physical geography. The model quantitatively assesses AGP using ten variables, including socioeconomic, demographic, geomorphometric, climatic, and natural hazard factors. It uniquely differentiates between anthropogenic pressure and natural erosion susceptibility, providing a dual-impact profile for ecumene regions. A case study in four sub-districts of coastal South Goa—Marmugao, Salcete, Quepem, and Canacona—was conducted for model validation, covering the period from AD 2000 to 2020. Results revealed markedly higher AGI@E values in Marmugao (338.77 in 2000; 229.44 in 2020) and Salcete (358.34 in 2000; 290.80 in 2020), indicating intensive anthropogenic influence, coinciding with rapid urban and industrial development. In contrast, Quepem and Canacona displayed significantly lower values (Quepem: 85.10 to 103.84; Canacona: 73.40 to 76.29), suggesting relatively stable geomorphic conditions with limited human interference. Extensive field surveys, satellite data, and historical development trends corroborated these outcomes. The AGI@E model effectively identifies and quantifies geomorphic stress in human-dominated landscapes, making it a valuable tool for regional planning and environmental management. However, its applicability is currently limited to ecumene zones, necessitating caution when extrapolating beyond inhabited regions.