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<p>Evaluating channel seepage rates is crucial for the effective and sustainable management of irrigation systems. Seepage can result in significant losses, leading to adverse outcomes such as settling, subsidence, and collapse. Afghanistan heavily depends on irrigation channels to transport water to remote locations, particularly in regions lacking natural water sources, such as the northern areas. This study concentrated on analyzing seepage rates in the first phase of the Khush Tepa Canal Project. The primary aim is to provide insights to ensure the project's safe performance. This study employed SEEP/W numerical modeling to assess seepage rates and flow patterns in the canal and adjacent soil. The approach is a distinctive, context-specific application in Afghanistan’s dry conditions, giving a practical framework that wasn’t previously applied in prior regional analysis. The results of this study reveal that employing simulation models with a coefficient of remaining mass (CRM = 10.33%) is an effective approach for estimating seepage flow. The analysis showed that seepage rates were notably high, about 18%, in the first 20&#xa0;km of the main canal, moderate to high, below 10%, up to 40&#xa0;km, and within acceptable engineering limits for the remaining sections extending to 108&#xa0;km. Furthermore, the canal lining achieved an approximate 50% reduction in water losses and improving irrigation efficiency. These findings not only advance the fundamental understanding of seepage flow but also offer valuable insights for the management of water resources, design of hydraulic infrastructure, and efforts in environmental conservation. Furthermore, appropriate suggestions for the current status of the construction effort are also provided.</p>

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Numerical Analysis of Channel Seepage Using Geo-studio Modeling: A Case Study in an Artificial River, Afghanistan

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Jahanzeb Rahimi,
  • Mohammad Nasim Nasimi

摘要

Evaluating channel seepage rates is crucial for the effective and sustainable management of irrigation systems. Seepage can result in significant losses, leading to adverse outcomes such as settling, subsidence, and collapse. Afghanistan heavily depends on irrigation channels to transport water to remote locations, particularly in regions lacking natural water sources, such as the northern areas. This study concentrated on analyzing seepage rates in the first phase of the Khush Tepa Canal Project. The primary aim is to provide insights to ensure the project's safe performance. This study employed SEEP/W numerical modeling to assess seepage rates and flow patterns in the canal and adjacent soil. The approach is a distinctive, context-specific application in Afghanistan’s dry conditions, giving a practical framework that wasn’t previously applied in prior regional analysis. The results of this study reveal that employing simulation models with a coefficient of remaining mass (CRM = 10.33%) is an effective approach for estimating seepage flow. The analysis showed that seepage rates were notably high, about 18%, in the first 20 km of the main canal, moderate to high, below 10%, up to 40 km, and within acceptable engineering limits for the remaining sections extending to 108 km. Furthermore, the canal lining achieved an approximate 50% reduction in water losses and improving irrigation efficiency. These findings not only advance the fundamental understanding of seepage flow but also offer valuable insights for the management of water resources, design of hydraulic infrastructure, and efforts in environmental conservation. Furthermore, appropriate suggestions for the current status of the construction effort are also provided.