工业园区SO_2大气环境容量时间变化特征分析

Analysis of Time Variation Characteristics of SO_2 Atmospheric Environmental Capacity in Industrial Park

地处西北干旱区的某工业园区(简称X园区),面积广阔、企业众多,其SO_2大气环境容量变化大.为准确掌握园区SO_2大气环境容量变化以及为X园区SO_2总量控制提供科学依据,利用当地气象站(简称C气象站)观测资料,进行风速统计的简单修正后,在修正A值法基础上分析X园区不同时间下的SO_2大气环境容量变化趋势,并根据灰色关联度法分析其影响因素.结果表明:研究期内,SO_2年环境容量变化较大,其次为非采暖期、采暖期,月环境容量变化最小.SO_2年环境容量变化趋势呈抛物线型变化;SO_2月环境容量1至5月呈上升趋势,从5月开始下降,1月达到最小值;SO_2季环境容量在春、夏季较高,冬季环境容量最小,SO_2采暖期与非采暖期之间环境容量差异巨大.影响SO_2大气环境容量的最大因素是系数A,其次是混合层高度、风速、环境背景浓度,且系数A、混合层高度皆受风速直接影响.

In the northwest arid area, a certain industrial park(X park) has a wide area and a large number of enterprises, its SO2 atmospheric environmental capacity changes greatly. In order to accurately master the change of SO2 atmospheric environmental capacity and provide a scientific basis for control of total amount control of SO2 in X park, the observational data of weather station(C weather station) are used to modify the wind speed and on the basis of modified A value method analyze changing trend of SO2 atmospheric environmental capacity of the X park under different periods and the influencing factors are analyzed according to the grey correlation degree method. The results display that during the study period, SO2 annual environmental capacity changes greatly, then the Heating and Non-Heating periods and the environmental capacity of the month changes less. The changing trend of SO2 annual environmental capacity is parabolic and SO2 monthly environmental capacity is rising from January to May and from May down, reaching the minimum in January. SO2 seasonal environmental capacity is higher in spring and summer, and the smallest in winter. There is a great difference in SO2 atmospheric environmental capacity between the Heating and Non-Heating periods. The A coefficient are the largest influence factors of SO2 atmospheric environmental capacity, followed by the mixed layer height and wind speed, background concentration, and the A coefficient, the mixed layer height are directly affected by wind speed.