南宁市酸沉降来源的研究

建立2类模式(拉格朗日烟团轨迹模式和欧拉模式)研究南宁市的酸雨成因,计算出硫沉降场的分布特征和南宁市与广西各地区之间硫输送的关联矩阵.结果表明,2001年外来源的贡献占南宁市总硫沉降量的72%,而本地源的贡献占南宁市总硫沉降量的28%,故在南宁市的酸雨形成过程中外地源占据主导地位.自2001年8月-2002年9月,桂林、柳州、梧州、南宁4个城市环保监测站同步进行的10次降雨过程的pH观测结果亦表明,对南宁市硫沉降贡献最大的仍为外来源.因此,这2类模式的计算结果合理. 

Study on the Origin of Sulfur Deposition in Nanning

Two kinds of models (Lagrangian model and Eulerian model) were established to investigate the origin of acid rain in Nanning. The spatial distribution of the sulfur deposition and area-to-area source-receptor matrix between Nanning and Guangxi autonomous region were calculated. The calculation result shows that 72% of sulfur deposition in Nanning comes from the external sources while 28% comes from local sources in 2001. Therefore, external sources play major role in formation of acid rain in Nanning. According to simultaneous pH monitoring by environmental monitoring stations of Guilin, Liuzhou, Wuzhou and Nanning for 10 rainfalls from August 2001 to September 2002, the largest contributors of sulfur deposition in Nanning were still external sources. This shows that the calculation results by the two models are reasonable and credible.