| 温瑞塘河流域水体污染时空分异特征及污染源识别 |
| 摘要点击 2442 全文点击 1240 投稿时间：2014-06-27 修订日期：2014-07-26 |
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| 中文关键词 水质评价 主成分分析 时空变异特征 污染源识别 人类活动 |
| 英文关键词 water quality assessment principal component analysis temporal and spatial variation characteristics pollution source apportionment anthropogenic activities |
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| 中文摘要 |
| 不同季节主要污染物的空间分布特征及其潜在的污染源分析对水资源管理与污染控制具有重要意义. 本研究应用GIS、主成分分析方法对2008-09~2009-10温瑞塘河水的温度、DO、电导率、pH、浊度、NH4+-N、NO2-、NO3-、PO43-、SiO32-、H2S、TOC、TN等水质参数进行时空分异特征分析和潜在污染源的识别. 结果表明流域内丰水期、平水期、枯水期的典型污染物是TN、NH4+-N、PO43-,主要来自于工业和生活点源; 空间上水质污染程度是三级河道>二级河道>一级河道,无论几级河道市区的水质都劣于郊区和湿地; 时间上水质污染程度是枯水期>平水期>丰水期; 另外河道周边人口密度、土地利用类型及其调水对温瑞塘河的水质产生了不同程度的影响. |
| 英文摘要 |
| Identifying the temp-spatial distribution and sources of water pollutants is of great significance for efficient water quality management pollution control in Wenruitang River watershed, China. A total of twelve water quality parameters, including temperature, pH, dissolved oxygen(DO), total nitrogen(TN), ammonia nitrogen(NH4+-N), electrical conductivity(EC), turbidity(Turb), nitrite-N(NO2-), nitrate-N(NO3-), phosphate-P(PO43-),total organic carbon(TOC) and silicate(SiO32-), were analyzed from September, 2008 to October, 2009. Geographic information system(GIS) and principal component analysis(PCA) were used to determine the spatial distribution and to apportion the sources of pollutants. The results demonstrated that TN,NH4+-N,PO43- were the main pollutants during flow period, wet period, dry period, respectively, which was mainly caused by urban point sources and agricultural and rural non-point sources. In spatial terms, the order of pollution was tertiary river>secondary river>primary river, while the water quality was worse in city zones than in the suburb and wetland zone regardless of the river classification. In temporal terms, the order of pollution was dry period>wet period>flow period. Population density, land use type and water transfer affected the water quality in Wenruitang River. |
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