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[摘 要]：随着经济的高速发展发展,全国各大城市的污染物排放日益加剧。区域性污染问题日益突出,地区的空气质量不仅成为政府部门的焦点，而且社会各界也在关注环境污染问题。因此研究地区性首要污染物的时空分布特征以及其污染源，对于治理和改善该地区的空气质量具有一定的现实指导意义。40249
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本文研究基于GIS软件对徐州各个监测站2014年-2015年每日的首要污染物数据,包括徐州市2014年逐日空气污染指数(API)数据以及首要污染物种类变化季节性分析，将徐州的首要污染物变化呈现出来，并得出以下结论：总体上看来徐州空气质量较好，一年之中半数以上天气状况为良好，但是一年之中约三分之一的时间是处于污染状态。总体各个等级空气质量一年中出现频率依次为良>轻度污染>优>中度污染>重度污染>严重污染; 徐州市各个监测点首要污染物时间上变化存在以下规律：（1）徐州市首要污染物以PM10、O3为主。（2）徐州市首要污染物以PM10出现频率最高，随着季节转变变化显著，具体为：PM10出现频率表现为:从第一季度到第二季度降低，第二季度到第三季度显著降低，第三季度到第四季度频率显著升高。（3）以O3为首要污染物出现频率很高，且伴随着季节转变变化显著，具体为：第一季度到第二季度O3出现频率升高，第二季度到第三季度频率显著升高，第三季度到第四季度频率显著降低。（4）各个污染物在时间上变化关系：以PM10为首要污染物出现的频率与以O3为首要污染物出现的频率呈现出负相关的趋势; 徐州市各个监测点首要污染物在各个季度的空间分布有所差异具体为：徐州市中部地区全年以PM10为首要污染物的频率明显高于其他区域，徐州东部与南部地区全年首要污染物为SO2 的出现频率明显少于其他区域。
[毕业论文关键词]： 徐州市，首要空气污染物，GIS
Analysis of Spatial and Temporal Distribution of Primary Pollutants Based on GIS in Xuzhou city
Abstract：
Along with the rapid development of economic , the emissions of pollutants in major cities are increased.Regional pollution problems have become increasingly prominent, the region's air quality has not only become the focus of the government, but alsoThe various social strata pay attention to the environmental pollution problem. So the space-time distribution features of regional primary pollutants and the pollution sources, has a certain realistic guiding significance to governance and improving the region's air quality.
In this paper based on GIS software for each monitoring station in 2014-2015, xuzhou daily data of primary pollutants, Including xuzhou 2014 daily air pollution index (API) data and the analysis of the primary pollutant seasonal change, to present space-time distribution of the primary pollutants in xuzhou and draw the following conclusion:The overall view of xuzhou air quality is better, more than half of the year the weather is good, but a year about a third of the time is in a state of pollution. Overall hierarchical order frequency is good air quality year > > light pollution optimal > > moderate pollution > > severe pollution seriously polluted;Xuzhou inpidual monitoring-station primary pollutants in time change has the following rules: (1) Xuzhou regions primary pollutants is given priority to with PM10,O3. (2) The inpidual monitoring-station of xuzhou primary pollutants with the highest occurrence of PM10, after significant changes with the seasons change, specific as follows: in the first quarter to the second quarter of PM10 reduced frequency, frequency decreased significantly in the second quarter to the third quarter, the third quarter to the fourth quarter of a significant rise in frequency. (3) O3 as primary pollutants frequency is very high, and with the seasons change significantly, specific as follows: in the first quarter to the second quarter of O3 higher frequency, a significant rise in the second quarter to the third quarter of the frequency, frequency was significantly lower in the third quarter to the fourth quarter. (4) the relation between various pollutants in time: the frequency of the occurrence and PM10 as primary pollutants with O3 as the frequency of primary pollutants presents negative correlation trend; Xuzhou inpidual monitoring-station primary pollutants in each quarter of the spatial distribution of different specific for: The central part of the xuzhou annual frequency of PM10 as primary pollutants is significantly higher than other area, xuzhou annual primary pollutants in southern and eastern area is the frequency of SO2 is less than that of other areas.