杭州市酸雨污染现状及成因分析

对杭州市1998年—2002年的降水监测数据进行了统计分析。结果表明,2002年杭州市区酸雨频率为73.6%,降水pH均值为4.68,临安酸雨频率高达97.5%,降水pH均值为4.04,其余几个县(市)降水酸度均<5.60。杭州市有82.1%面积属重酸雨区。指出,杭州市气象条件不利于大气中SO2、NOx的扩散,土壤扬尘不能对酸雨的形成起有效的缓冲作用,因此只有通过调整能源结构,从源头控制煤质(含硫量),严格控制机动车尾气污染,以减少SO2、NOx排放量。

Acid Rain Pollution and Its Origin of Hangzhou

Statistic was done for the precipitation monitoring data of Hangzhou from 1998 to 2002. In 2002, the frequency of acid rain was 73.6%, pH was 4.68. In Linan, the frequency was up to (97.5%,) pH was 4.04. In other region, pH was less 5.60. There are 82.1% area of Hangzhou was heavy pollution area of acid rain. The meteorological condition of Hangzhou was bad for the dispersion of SO_2?NO_x in atmosphere. It must adjust energy structure, control the sulfur content in coal, and control the emission pollution of motor vehicle, to decrease the emission of SO_2?NO_x.