• Occurrence of heavy rainfall around the confluence line in monsoon disturbances and its importance in causing floods

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    • Keywords


      Monsoon disturbances; confluence line; heavy rainfall; floods

    • Abstract


      It is well known that heavy rainfall occurs in the southwestern sector of the monsoon depressions due to strong convergence in that sector. By examining the rainfall distribution associated with the monsoon disturbances (lows and depressions) in one of the central Indian river basins, ‘Godavari’, the author found that when the disturbance-centre is away from the basin, heavy rainfall may also occur in the basin area close to the confluence line and cause severe floods in the river. The confluence line is the zone of convergence between the northeasterlies to the west of the disturbance centre and the monsoon westerlies. This study further reveals the importance of the position and movement of the confluence line with respect to the basin, on which the intensity and the raising period of the resulting flood depend.

    • Author Affiliations


      G Nageswara Rao1

      1. Department of Meteorology & Oceanography, Andhra University, Visakhapatnam - 530003, India
    • Dates

  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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