重庆市十二五期间SO2和NOx总量控制对降低酸沉降的效果评估

摘要

为了评估重庆市"十二五"SO2和NOx总量控制对降低酸沉降的效果,利用重庆铁山坪2011~2016年的穿透水的观测数据进行硫沉降和氮沉降变化趋势分析.结果表明硫沉降下降效果显著,而氮沉降的下降尚不明显.2016年重庆铁山坪的穿透水中硫沉降为2.34kmolc/(hm2·a),与2011年的6.70kmolc/(hm2·a)相比有大幅下降;而2016年氮沉降为2.11kmolc/(hm2·a),与2011年的2.41kmolc/(hm2·a)相当.重庆地区的酸沉降整体上有所下降,但是氮沉降的控制仍需加强.%In order to evaluate the effect of the total SO2 and NOxemissions control on the decrease of acid deposition, we analyzed the trends of sulfur deposition and nitrogen deposition on the basis of the throughfall from 2011 to 2016 at Tieshanping catchment, Chongqing. The sulfur deposition significantly reduced from 6.70kmolc/(hm 2 ·a) in 2011 to 2.34kmolc/(hm 2 ·a) in 2016. In comparison, the nitrogen deposition did not have obvious decrease, with the values of 2.41kmolc/(hm 2 ·a) and 2.11kmolc/(hm 2 ·a) in 2011 and 2016, respectively. Therefore, although the total acid deposition has declined in Chongqing, the control of nitrogen deposition still need to be strengthened.