荆门市近十年大气降雨的变化特征分析

Variation Characteristics of Precipitation in Jingmen City in Recent Decade

利用荆门市2001—2010年对城区和石化区的降水监测资料,研究分析了荆门市近十年来的大气降水量、pH及电导率的变化情况。结果表明:荆门市近十年来的年均降水量为793.27 mm,降水主要集中在5—8月,年降水量变化较大,基本呈周期性的波动趋势。荆门市城区降水的pH和电导率比较稳定,没有出现酸雨。石化区的降水年平均pH比城区低,年平均电导率比城区高,有酸雨发生,但污染并不严重。

Changes of precipitation,pH value and the electrical conductivity features in Jingmen city were investigated in the context of the monitoring data of urban area and petrochemical industry area in the period of 2001-2010.The results indicated that the annual rainfall of Jingmen city in recent decade is 793.27 mm,and precipitation mainly happened during May and August.The annual precipitation changed greatly,and basically appeared a trend of periodical fluctuation.The pH value and the electrical conductivity of precipitation in urban area of Jingmen city is stable and acid rain do not happen.The average pH value of annual precipitation in petrochemical industry area is lower than that in urban area,and the average annual electrical conductivity is higher.The acid rain is found to happen in this area,but its pollution is not serious.