Abstract
A simple method for estimation of mean angle of deflection i.e. slant angle of wind driven rain from vertical has been recapitulated. The method has been used for computation of average slant angles of rain for twelve driving rain prone stations, viz., Bhopal, Mumbai, Calcutta, Cochin, Indore, Kodaikanal, Mangalore, Port Blair, Sagar Island, Tiruchchirapalli, Tiruvananthapuram, and Veraval. Based on ten years data on mean hourly wind speed and hourly rainfall, the cumulative probability distribution of angle of deflection of rain at these stations were determined and optimum values of these angles were worked out. The values vary broadly from 50° to 65° for the stations covered in the present study.
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