Occurrence of heavy rainfall around the confluence line in monsoon disturbances and its importance in causing floods |
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| Authors: | G Nageswara Rao |
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| Institution: | (1) Department of Meteorology & Oceanography, Andhra University, 530003 Visakhapatnam, India |
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| 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. |
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| Keywords: | Monsoon disturbances confluence line heavy rainfall floods |
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