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Abstract <p>The present study investigates the alarming decline of Mohana Ghat Island in Dibrugarh between 2014 and 2025, driven by intensified riverbank erosion and monsoonal flooding in the Brahmaputra River. Once a fertile 103-hectare land was supporting roughly 50 households, the island has been reduced to only 6.51 hectares by 2025. Most of this loss occurred rapidly following post-monsoon events in 2024, as confirmed by remote-sensing data and community reports. Utilizing GIS-based analysis, hydrological data, 3D modelling, and field observations, the research examines the relationship between riverbank erosion, island degradation, waterlogging, and human adaptation strategies. Findings reveal significant land loss due to Brahmaputra River’s dynamic behaviour, exacerbated by inadequate infrastructure and climate variability. The study underscores the urgency for integrated management approaches combining technological interventions with community-based adaptation.</p> Research highlights <p><UnorderedList Mark="Bullet"> <ItemContent> <p>Severe erosion of Mohana Ghat Island detected using ArcScene 3D modelling.</p> </ItemContent> <ItemContent> <p>Hydrological analysis links river shifts with urban waterlogging impacts.</p> </ItemContent> <ItemContent> <p>Communities face rising socio-economic vulnerability from land loss.</p> </ItemContent> <ItemContent> <p>Study calls for integrated GIS-based and community adaptation strategies.</p> </ItemContent> </UnorderedList></p>

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Island degradation and waterlogging assessment in Mohana Ghat, Dibrugarh, Assam: using ArcScene 3D modelling

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Chandra Kumar Dutta,
  • Appun Taye

摘要

Abstract

The present study investigates the alarming decline of Mohana Ghat Island in Dibrugarh between 2014 and 2025, driven by intensified riverbank erosion and monsoonal flooding in the Brahmaputra River. Once a fertile 103-hectare land was supporting roughly 50 households, the island has been reduced to only 6.51 hectares by 2025. Most of this loss occurred rapidly following post-monsoon events in 2024, as confirmed by remote-sensing data and community reports. Utilizing GIS-based analysis, hydrological data, 3D modelling, and field observations, the research examines the relationship between riverbank erosion, island degradation, waterlogging, and human adaptation strategies. Findings reveal significant land loss due to Brahmaputra River’s dynamic behaviour, exacerbated by inadequate infrastructure and climate variability. The study underscores the urgency for integrated management approaches combining technological interventions with community-based adaptation.

Research highlights

Severe erosion of Mohana Ghat Island detected using ArcScene 3D modelling.

Hydrological analysis links river shifts with urban waterlogging impacts.

Communities face rising socio-economic vulnerability from land loss.

Study calls for integrated GIS-based and community adaptation strategies.