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    Geomorphological influence on groundwater quality and arsenic distribution in parts of Brahmaputra river basin adjoining eastern Himalayas

    Access Status
    Fulltext not available
    Authors
    Verma, S.
    Mukherjee, Abhijit
    Date
    2014
    Type
    Conference Paper
    
    Metadata
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    Citation
    Verma, S. and Mukherjee, A. 2014. Geomorphological influence on groundwater quality and arsenic distribution in parts of Brahmaputra river basin adjoining eastern Himalayas, pp. 123-125.
    Source Title
    Proceedings of the 16th International Association for Mathematical Geosciences - Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment: Challenges, Processes and Strategies, IAMG 2014
    ISBN
    9789381891254
    URI
    http://hdl.handle.net/20.500.11937/68208
    Collection
    • Curtin Research Publications
    Abstract

    © 2014, Capital Publishing Company. The present study attempts to understand the controls of geomorphological terrains on groundwater geochemistry and groundwater arsenic (As) distribution in the shallow aquifers of parts of the Brahmaputra floodplains of India. Three different geomorphologic units e. g. older alluvial (OA), younger alluvial (YA) and river channel deposits (RCD) were identified as predominant geomorphic terrains in the study area by coupled remote sensing and field observations. Groundwater compositions in the aquifers of these terrains were dominated by Ca-Na-HCO 3 and Na-Ca-HCO 3 hydrogeochemical facies. At least 60 % groundwater samples of study areahave As = 0. 01 µg/L. The reductive dissolution of (Fe-Mn)OOH is the dominant mechanism of As mobilization in different alluvial terrains and redox transitions play major role for As mobilization in groundwater.

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