摘要
通过对宿州市沱河段沿岸实地调查,以沱河东关闸断面为采样点,分时段采集样品,并以沱河东关闸断面2004—2009年的连续监测资料为基础,对水质污染物主要指标进行了分析。监测的水质指标包括溶解氧(DO)、生化需氧量(BOD)、化学需氧量(COD)、氨氮(NH3—N)、总氮(TN)、总磷(TP)。采用单因子评价,基于直观图解、线性趋势分析和季节性Kendall检验法,探究了沱河水质污染的年内及年际变化趋势,并分析影响水质变化的主要因素,提出了相关保护对策。结果表明:(1)年内水质变化显著,DO,NH3—N和TP在冬季含量偏高,TN和COD在春、秋季含量较高,BOD在夏季含量偏高。(2)年际变化方面,BOD,NH3—N和TN均呈显著下降趋势,COD呈不明显下降趋势,DO和TP无明显变化趋势。总体来说,宿州市沱河段水质状况处于不断改善之中。
By investigating Tuohe River section in Suzhou City, this study used the Dongguanzha station as the sampling point to analyze the main index of water quality based on the continuous monitoring data of Tuohe River from 2004 to 2009. The monitored water quality indicators are DO, BOD, COD, NH3--N, TN and TP. Based on the method of single factor evaluation, the intuitive graphical interpretation, the linear trend analysis and seasonal Kendall test were used to explore the seasonal and interannual trends of water pollution of Tuohe River. The results indicated that： （1） Water quality changed significantly during a year, the content of DO, NH3--N and TP were higher in winter, while TN and COD were higher in spring and au- tumn, and the BOD content was higher in summer. （2） The inter-annual variations of BOD, NH3--N and TN showed significantly downtrend, while there was no obvious change about COD. In general, water quali- ty of Tuohe River section in Suzhou City is becoming better.
出处
《水土保持通报》
CSCD
北大核心
2013年第6期308-312,共5页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"水资源约束下的黑河流域土地利用/覆盖变化模拟研究"(40961038)
生态经济学省级重点学科(5001-02)
西北师范大学知识与科技创新工程项目(NWNU-KJCXGC-03-66)
关键词
河流污染
水质变化
宿州市沱河段
River pollution
water quality change
Tuohe River section in Suzhou City
