Remote sensing survey on avulsion and bank erosion of Kobo Chapori

  • Manash Pratim Gogoi* and Swapnil Hazarika
    Department of Geology, Sibsagar College, Joysagar (Autonomous)


  • In an active drainage network, numerous fluvial processes may occur. Avulsion and bank erosion are distinct processes that together may work out in complex anastomosing channels resulting significant change in landforms and channel shifting. The Kobo Chapori, located at the eastern most part of Brahmaputra valley has been studied using time-lapsed satellite images taken between 2008 and 2019 showing drastic loss in landmass. From remote sens- ing based study showed about 33.373 sq. km. of area has been lost in river avulsion and bank erosion. Southern side of the Chapori has experienced significant amount of land loss in between year 2017 and 2018. Based on the rate of erosion it is manifested that the portion of D’Ering Memorial Wildlife Sanctuary of Arunachal Pradesh which is located in Chapori has been affecting from this land loss and is in risk of obliteration.

  • Key words: remote sensing, satellite data, time-lapse, avulsion, bank erosion, land-loss

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