A Study on Chemical Composition and Formation of Dewfall in Miryang Area

In order to understand chemical characteristics and formation of dewfall in Miryang area, we analysed monthly distribution of dewfall, and investigated its chemical composition of dewfall. The modified teflon plate ($1m{\times}1m$) was used qualitatively to collect water soluble components at Miryang weather station from August 2002 to April 2003. Dewfall amount during the sampling periods (37 day) collected 5.28 mm. The behaviors of water soluble ions in dewfall showed the highest concentration ($555.8{\mu}eq/l$ for $Cl^-$, $338.6{\mu}eq/l$ for ${NO_3}^-$, $1118.2{\mu}eq/l$ for ${SO_4}^{2-}$, $262.7{\mu}eq/l$ for ${NH_4}^+$, $1341.0{\mu}eq/l$ for ${Ca_2}^+$, $177.8{\mu}eq/l$ for ${Mg_2}^+$, and $325.5{\mu}eq/l$ for $Na^+$) during the April, the lowest concentration ($243.6{\mu}eq/l$ for ${SO_4}^{2-}$, $39.3{\mu}eq/l$ for ${NH_4}^+$ and $456.2{\mu}eq/l$ for ${Ca_2}^+$) during the September. Monthly equivalent ratio of [${SO_4}^{2-}$]/[${NO_3}^-$] showed the highest value (6.45) during the March, the lowest value (1.86) during the September, and the mean value was 2.70.

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