Scholarlink

<p>The various Watersheds in Ethiopia and around the world have faced challenges from soil erosion and land degradation, highlighting the need for effective conservation planning. This study aims to prioritize sub-watersheds within the Andasa watershed using morphometric and topo-hydrological parameters, derived from a 20 × 20&#xa0;m resolution Digital Elevation Model (DEM), and stakeholder input. An Automated Sub-Watershed Prioritization Tool (SWPT) was used to generate compound parameter value (CPV), utilized for watershed prioritization ranking by integrating key topo-hydrological, and morphometric parameters. This Parameter was generated by integrating topo-hydrological with morphometric parameters, reflecting the relative erosion susceptibility of each sub-watershed. The lower or more negative CPV values indicate higher vulnerability. The result indicated SW-2 as the most erosion-prone sub-watershed, with a CPV of − 342.8, followed by SW-7 (− 307), SW-8 (− 296.5), and others in descending order of priority. Validation of the SWPT outputs was conducted through sensitivity analysis, expert evaluation, and the use of 80 field-verified Ground Control Points (GCPs), which demonstrated strong ground truth. 77.5% of the area is exposed to gully and severe erosion, which aligns with the observed degradation patterns. This confirms the reliability of the tool. The field observations support the prioritization results, with the most susceptible sub-watersheds exhibiting visible signs of rill and gully erosion, poor vegetation cover, and declining agricultural productivity. The findings confirmed that the study area’s erosion vulnerability and the SWPT provide exact and cost-effective watershed prioritization. Afforestation, check dams, and terracing are tailored conservation methods that local governments and stakeholders should employ to protect high-risk sub-watersheds.</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

Sub-watershed prioritization: coupling morphometric and topo-hydrological analysis in Ethiopia’s Andasa watershed, Upper Blue Nile Basin

  • 期刊论文

  • 发表日期：

    2025年10月24日

查看全文
  • Dessie Wubetu Melsse,
  • Workineh Tadesse Ayele,
  • Moges Animut Tegegne,
  • Yilak Taye Bihon,
  • Asimamaw Nigusie Asitatikie

摘要

The various Watersheds in Ethiopia and around the world have faced challenges from soil erosion and land degradation, highlighting the need for effective conservation planning. This study aims to prioritize sub-watersheds within the Andasa watershed using morphometric and topo-hydrological parameters, derived from a 20 × 20 m resolution Digital Elevation Model (DEM), and stakeholder input. An Automated Sub-Watershed Prioritization Tool (SWPT) was used to generate compound parameter value (CPV), utilized for watershed prioritization ranking by integrating key topo-hydrological, and morphometric parameters. This Parameter was generated by integrating topo-hydrological with morphometric parameters, reflecting the relative erosion susceptibility of each sub-watershed. The lower or more negative CPV values indicate higher vulnerability. The result indicated SW-2 as the most erosion-prone sub-watershed, with a CPV of − 342.8, followed by SW-7 (− 307), SW-8 (− 296.5), and others in descending order of priority. Validation of the SWPT outputs was conducted through sensitivity analysis, expert evaluation, and the use of 80 field-verified Ground Control Points (GCPs), which demonstrated strong ground truth. 77.5% of the area is exposed to gully and severe erosion, which aligns with the observed degradation patterns. This confirms the reliability of the tool. The field observations support the prioritization results, with the most susceptible sub-watersheds exhibiting visible signs of rill and gully erosion, poor vegetation cover, and declining agricultural productivity. The findings confirmed that the study area’s erosion vulnerability and the SWPT provide exact and cost-effective watershed prioritization. Afforestation, check dams, and terracing are tailored conservation methods that local governments and stakeholders should employ to protect high-risk sub-watersheds.