Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBoruah, Sanchitaen_UK
dc.contributor.authorGilvear, Daviden_UK
dc.contributor.authorHunter, Peteren_UK
dc.contributor.authorSharma, Nayanen_UK
dc.description.abstractThis paper presents the results of a trialling of the use of Indian Remote Sensing (IRS) satellite imagery for mapping the geomorphology and physical habitat of the Brahmaputra River in Assam, India. The study was undertaken on a 110 km reach as the river emerges out of the Himalayas; a reach with a complex braid pattern and high levels of channel instability. Image analysis on four sets of IRS data encompassing a period of 13 years (1990-2002) was undertaken to detect basic changes in the extent and pattern of low flow channels, vegetated islands, exposed sand bars and floodplain vegetation. Simple unsupervised classification techniques were applied to the images. The water surface of the low flow braided channel network, however was mapped more accurately using the GROW facility within ENVI 4.1; a technique based upon mapping areas within a given number of standard deviations in terms of pixel values within a training area. Subsequent to this unsupervised classification of the water surface area allowed classification of the water in to three water types based on depth and separation of isolated pools and backwaters from the channels conveying flow. Overall classification accuracies of 82.5% were achieved in relation to mapping physical habitat; varying between 86 and 95% for the four different dates. Analysis of the nature of channel planform and habitat change showed that there has been a 3.7% increase in the active channel area consisting of exposed sediment and water within the river corridor. This substantiated a general awareness of an increase in the width and reduction in depth of the Brahmaputra River over the last few decades. The analysis also depicts the occurrence of a major avulsion and the highly dynamic nature of the braided channel network and sand bars.Overall the study demonstrated that simple classification methods when applied to satellite data, capturing imagery in the visible and near infra-red, can be used to measure important changes in the geomorphology and physical habitats that make up the fluvial system of the Brahmaputra River. The approach may also be more widely applicable to large river systems comprising a mosaic of water, exposed sediment and spectrally different vegetation communities. Copyright ¸ 2008 John Wiley & Sons, Ltd.en_UK
dc.relationBoruah S, Gilvear D, Hunter P & Sharma N (2008) Quantifying channel planform and physical habitat dynamics on a large braided river using satellite data - The Brahmaputra, India. River Research and Applications, 24 (5), pp. 650-660.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.subjectremote sensingen_UK
dc.subjectBrahmaputra Riveren_UK
dc.subjectimage analysisen_UK
dc.subjectriver islandsen_UK
dc.subjectsand barsen_UK
dc.subjectRiparian zonesen_UK
dc.titleQuantifying channel planform and physical habitat dynamics on a large braided river using satellite data - The Brahmaputra, Indiaen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[River Research and Applications 2008.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.citation.jtitleRiver Research and Applicationsen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationIndian Institute of Technologyen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorBoruah, Sanchita|en_UK
local.rioxx.authorGilvear, David|en_UK
local.rioxx.authorHunter, Peter|0000-0001-7269-795Xen_UK
local.rioxx.authorSharma, Nayan|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameRiver Research and Applications 2008.pdfen_UK
Appears in Collections:Biological and Environmental Sciences Journal Articles

Files in This Item:
File Description SizeFormat 
River Research and Applications 2008.pdfFulltext - Published Version233.61 kBAdobe PDFUnder Permanent Embargo    Request a copy

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

The metadata of the records in the Repository are available under the CC0 public domain dedication: No Rights Reserved

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.