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ASME Press Select Proceedings

International Conference on Measurement and Control Engineering 2nd (ICMCE 2011)

By
Yi Xie
Yi Xie
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ISBN:
9780791859858
No. of Pages:
500
Publisher:
ASME Press
Publication date:
2011

Make use of the surveillance data and the meteorology observation data of the acid rain in Xuchang Station from January in 2007 to September in 2010. Apply mathematical statistics and analyze the characteristics of the acid rain in the region. In addition, make preliminary discussion about the relationship between the characteristics of the acid rain and the meteorology factors. The results have shown that the frequency of acid rain from the year 2007 to the year 2010 is 65.5%. The annual PH value is 4.77. The results have shown that the region belongs to the area with relatively serious acid rain. The seasonal variation of acid rain in Xuchang is not so obvious. Summer is a season when the pollution of acid rain is relatively light. The reason for that is the subtropical anticyclone and severe convection weather. Xuchang is controlled by the subtropical anticyclone and severe convection weather in some areas in summer. It has a great deal of rainfall and the pollutants are easy to scatter about. In this way, the frequency of acid rain and the intensity in summer will ease up a bit. The variations of PH value and K value and the annual changing trend of the concentration of SO2, Ca2, and Mg+ in the air in Xuchang are synchronous. In winter, there are a great amount of pollutants in the air so that the concentration of pollution is high. When the concentration of pollutants is high in the air, the acidity of the acid rain is strong. There is no so much relationship between the rainfall PH value and the amount of precipitation. When N is the leading wind direction, the pollution of acid rain is the most serious. There is as well certain interdependency between the formations of the acid rain and the light fog.

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