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Erosion study of a part of Majuli River-Island using remote sensing data

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Abstract

Majuli, the world’s largest river island, is situated in mid of river Brahmaputra in Assam. River Brahmaputra flows in highly braided channels most of them are transient in nature, being submerged during high monsoon flows and changing drastically their geometry and location. Majuli island, home of about 1.3 million people is endangered because of the erratic behavior of the river. In this study, an attempt has been made to observe the trends of erosion in a small part of Majuli island, the area near Kaniajan village in south Majuli- a stretch of about 11 km, using satellite data of 1991, 1997 and 1998. Image processing of digital data has been done in ILWIS software. Supervised for delineation of river from land and then change detection analysis has been done to find out changes in river course from 1991 to 1997 and further from 1997 to 1998. Erosion and deposition maps of the area have been prepared and the erosion of island is measured at various sections at 1 km interval. Erosion of 1900 ha has been observed during the period of six years from 1991 to 1997 and 845 ha during the period of one year from 1997 to 1998.

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Authors and Affiliations

  1. Centre for Flood Management Studies, National Institute of Hydrology, 801 505, Patna

    Pankaj Mani, Rakesh Kumar & C Chatterjee

Authors
  1. Pankaj Mani
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  2. Rakesh Kumar
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  3. C Chatterjee
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Mani, P., Kumar, R. & Chatterjee, C. Erosion study of a part of Majuli River-Island using remote sensing data. J Indian Soc Remote Sens 31, 12–18 (2003). https://doi.org/10.1007/BF03030747

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  • DOI: https://doi.org/10.1007/BF03030747

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