Scholarlink

<p>Urban expansion significantly impacts soil erosion and land use, particularly in environmentally sensitive regions. Understanding these changes is crucial for sustainable land management and environmental conservation. This study was conducted in Akamkpa area of the Calabar Flank, Southern Nigeria. It evaluates the effects of urban expansion on soil erosion and land use changes using Geographic Information System (GIS) and remote sensing techniques. It aims to quantify land cover transformations, assess terrain characteristics, and identify vulnerable areas requiring mitigation strategies. Terrain analysis was conducted using Shuttle Radar Topography Mission (SRTM) Digital Elevation Model (DEM) data, processed in ArcGIS environment. Slope, elevation, and soil properties were analyzed to determine erosion susceptibility. Land Use/Land Cover (LULC) changes were assessed using post-classification comparison techniques, comparing 2017 and 2023 satellite imagery. Soil erodibility factors were calculated using empirical models. The study found that built-up areas increased from 21.48&#xa0;km² in 2017 to 34.13&#xa0;km² in 2023 (59% growth), while tree cover declined by 36.50&#xa0;km². Cropland expansion nearly doubled, reaching 46.26&#xa0;km². Low-lying areas were most vulnerable to erosion due to high water retention and poor drainage. Steeper slopes in northern regions exhibited rapid runoff, accelerating soil loss. Urbanization intensified land degradation, particularly in low-lying regions with weak drainage. The study highlights the need for targeted soil conservation and sustainable urban planning to mitigate erosion and support ecological stability. This research uses geospatial techniques to provide a holistic understanding of the impact of urbanization on erosion and land degradation, offering actionable insights for sustainable development.</p>

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 Evaluation of Urban Expansion Impacts on Soil Erosion and Land Use Changes in Parts of the Calabar Flank, Southern Nigeria

  • 期刊论文

  • 发表日期：

    2026年3月30日

查看全文
  • Francis Begianpuye Akiang,
  • Theresa Nkechi Obiekezie,
  • Anthony Michael George,
  • Faith Onyinyechi Sunday,
  • Ikechukwu Onyema Njoku,
  • Chidiebere Charles Agoha,
  • Caroline Chinyere Amadi,
  • Trust Akpabio

摘要

Urban expansion significantly impacts soil erosion and land use, particularly in environmentally sensitive regions. Understanding these changes is crucial for sustainable land management and environmental conservation. This study was conducted in Akamkpa area of the Calabar Flank, Southern Nigeria. It evaluates the effects of urban expansion on soil erosion and land use changes using Geographic Information System (GIS) and remote sensing techniques. It aims to quantify land cover transformations, assess terrain characteristics, and identify vulnerable areas requiring mitigation strategies. Terrain analysis was conducted using Shuttle Radar Topography Mission (SRTM) Digital Elevation Model (DEM) data, processed in ArcGIS environment. Slope, elevation, and soil properties were analyzed to determine erosion susceptibility. Land Use/Land Cover (LULC) changes were assessed using post-classification comparison techniques, comparing 2017 and 2023 satellite imagery. Soil erodibility factors were calculated using empirical models. The study found that built-up areas increased from 21.48 km² in 2017 to 34.13 km² in 2023 (59% growth), while tree cover declined by 36.50 km². Cropland expansion nearly doubled, reaching 46.26 km². Low-lying areas were most vulnerable to erosion due to high water retention and poor drainage. Steeper slopes in northern regions exhibited rapid runoff, accelerating soil loss. Urbanization intensified land degradation, particularly in low-lying regions with weak drainage. The study highlights the need for targeted soil conservation and sustainable urban planning to mitigate erosion and support ecological stability. This research uses geospatial techniques to provide a holistic understanding of the impact of urbanization on erosion and land degradation, offering actionable insights for sustainable development.