2001—2007年银川市降水pH值变化分析及控制措施

Analysis and controlling measure on variation of precipitation pH in Yinchuan from 2001 to 2007

根据银川国家基准气候站2001—2007年对大气降水酸雨观测资料和《酸雨观测站环境报告书》,采用降水量加权法计算并分析银川市降水pH值的变化趋势、季节分布特征及降水pH值减小的原因.2001—2007年,银川市降水pH值变化范围为5.79-8.33,各季的降水pH值均偏碱性,平均降水pH值春季的碱性最强,冬季次之,秋季最弱.

According to the observation data of acid rain from atmospheric rainfall by Yinchuan National Climate Observatory from 2001 to 2007, the tendency of variation of precipitation pH in Yinchuan, seasonal distribution characteristics and the reasons for the decrease of precipitation pH were calculated and analyzed by weighted measure of precipitation. The results showed that the variation range of precipitation pH was from 5.79 to 8.18 and precipitation pH in all seasons in Yinchuan presented alkaline from 2001 to 2007. Alkalinity in spring was the strongest, alkalinity in winter came second and alkalinity in autumn was the weakest.