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    Channel response in structurally disturbed terrain: evaluation of implication of neotectonic activity through an integrated approach

    Access Status
    Fulltext not available
    Authors
    Vijith, Vijith
    Prasannakumar, V.
    Mohan, M.
    Pratheesh, P.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Vijith, V. and Prasannakumar, V. and Mohan, M. and Pratheesh, P. 2015. Channel response in structurally disturbed terrain: evaluation of implication of neotectonic activity through an integrated approach. Geocarto International. 30 (9): pp. 984-996.
    Source Title
    Geocarto International
    DOI
    10.1080/10106049.2015.1006528
    ISSN
    1010-6049
    School
    Curtin Sarawak
    URI
    http://hdl.handle.net/20.500.11937/50049
    Collection
    • Curtin Research Publications
    Abstract

    The anomalous channel pattern in the midland stretch of the river Karamana, having highly sinuous and incised course with varying floodplain, is analysed to determine the different stages of evolution of the river channel in response to the structural disturbances in the area. Geometric analysis of foliation, geospatial analyses of sinuosity index, hypsometry, channel and streamline changes, river channel cross-profile, longitudinal profile and derivation of fold structure from satellite images were attempted in evaluating the characteristic features of the selected river segment. Datasets used in the analysis were collected through the detailed fieldwork, structural mapping and interpretation of satellite images and satellite-derived digital elevation data. Systematic analysis of the channel pattern of the selected reaches of the river, in 1915, 1968 and 2008 classifies the river as tortuously meandering. Implications of tectonic disturbance can be inferred from the presence of channel incision, unpaired terraces, younger terrain with intense erosion, knick points, convex river long profile, and high hypsometric integral, oscillating and unpaired character of the river channel. Structural analysis along with GIS and remote sensing studies proved the presence of a major fold with a NW–SE-trending axial surface. An evolutionary model is proposed to elucidate the channel planform changes in response to the deformation and tectonic uplift of the region.

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