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      https://www.ias.ac.in/article/fulltext/jess/108/01/0057-0068

    • Keywords

       

      Mudbanks; Kerala coast; edge waves; infragravity waves; far infragravity waves; currents; undertow; reflections

    • Abstract

       

      Field experiments conducted in the nearshore ocean to understand the dynamics of mudbank off Kerala, south-west coast of India, are highlighted. Real time monitoring of the nearshore ocean off Purakkad, Kerala was accomplished using pressure transducers for nearshore surface wave measurements, and current sensors for nearshore velocity measurements. Comprehensive information on the spatial structure of mudbank was obtained from aerial surveys. Extensive data collected on surface waves and currents in the nearshore ocean, indicate that the infra-gravity (IG) waves (leaky modes and trapped edge wave modes), and far infra-gravity (FIG) waves coupled with strong shoreline reflections and undertow play an important role in the dynamics associated with the mudbanks off Kerala during the monsoon season. During the non-monsoon season evidence for progressive edge waves in the infragravity frequency band, an energetic gravity wave band and a strong undertow with weak reflections was observed.

    • Author Affiliations

       

      R Tatavarti1 A C Narayana2 P Manoj Kumar2 Shyam Chand2

      1. Naval Physical and Oceanographic Laboratory, Defence R & D Organization, Thrikkakara, Cochin - 682 021, India
      2. Department of Marine Geology & Geophysics, School of Marine Sciences, Cochin University of Science & Technology, Lake Side Campus, Fine Arts Avenue, Cochin - 682 016, India
    • Dates

       
  • Journal of Earth System Science | News

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