重庆市渝中区20年酸雨污染变化趋势及成因分析研究

以重庆市渝中区降雨及大气监测数据为基础,对重庆市渝中区近二十年酸雨污染的变化趋势、降水中化学成分变化进行分析,并从致酸源、地理因素、气象因素等方面探讨了重庆市渝中区酸雨污染的主要成因.结果表明:重庆市渝中区酸雨污染不仅来自于本区,还受外区输入性污染影响,特殊的地理环境和不利的大气扩散条件加重了酸雨污染的程度;近年来降雨pH总体上升,酸雨污染有所减轻;酸雨污染由煤烟型污染向石油型污染转变.

Analysis on Characteristics and Causes of Acid Rain Pollution inYuzhong District of Chongqing City in Twenty Years

Based on the rainfall and atmospheric monitoring data in Yuzhong District of Chongqing Municipality, this paper analyzed the trend of acid rain pollution in Yuzhong District in Chongqing City in recent 20 years and the change of chemical com-position in precipitation. It discussed the factors of acid source,geographical factors and meteorological factors and the main cau-ses of acid rain pollution.The results show that the acid rain pollution not only comes from this area but also is affected by the in-put pollution in the outer area. The special geographical environment and unfavorable atmospheric diffusion conditions aggravate the degree of acid rain pollution. In recent years,the rainfall pH generally increases,has been alleviated;acid rain pollution from coal-based pollution to oil-based pollution change.