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| 太原汾河景区跨桥断面水体污染的时空变化模式研究 |
| Spatiotemporal Patterns of Water Pollution on Bridge cross Sections in Taiyuan Segment,Fen River Watershed |
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| DOI： |
| 中文关键词: 污染指数 主成分分析 自组织特征映射网络 时空变化 水污染 汾河景区 |
| 英文关键词: Pollution index Principal component analysis Self organizing map Spatiotemporal patterns Water pollution Fen river watershed |
| 基金项目:山西省科技厅基金资助项目（20130313010-4）；太原市环保局基金资助项目 |
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| 中文摘要: |
| 选取太原汾河景区跨桥断面8个监测点，在2012年 3 月—2013年10月期间对河流8项水质参数进行监测，并结合派生的水体综合污染指数及主成分分析方法分析和评价景区水污染时空变化特征。结果表明，景区水质污染变化时空差异明显，上游污染相对较小，下游污染较重；春季溶解氧和pH值变化幅度最大，夏季除总氮和氨氮外，其他各污染物均有显著变化特征，秋季则以氨氮、总氮和总磷变化最为显著。主成分分析结果显示，虽然各监测点水体污染的关键影响因子不同，但总磷是太原市河流水体污染的共同解释因子。 |
| 英文摘要: |
| In this study,8 water quality variables were investigated in 8 monitoring sites located on the bridge cross sections of Taiyuan Segment in Fen river watershed during the period of March 2012 to October 2013.Spatiotemporal patterns of stream pollution were explored based on water pollution index coupled with principal component analysis (PCA).The results showed that spatial difference of hydrochemical variables is observed with the relative small values in upstream and relative high values in downstream.Meanwhile,the eight water quality variables also had temporal differences:high values of DO and pH were observed in spring; all variables except TN and NH3N changed drastically in summer while TP,TN and NH3N became the main changing elements in fall.The results of PCA indicated that TP was the common explaining factors. |
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