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文章摘要
千岛湖沉积物中碳、氮、磷的分布特征及污染评价
Distribution Characteristics and Pollution Assessment of Carbon, Nitrogen and Phosphorus in Sediments of Qiandao Lake
  
DOI:
中文关键词: 有机质  总氮  总磷  沉积物  分布特征  污染评价  千岛湖
英文关键词: Organic matter  Total nitrogen  Total phosphorus  Sediments  Distribution characteristic  Pollution assessment  Qiandao Lake
基金项目:杭州市社会发展科研攻关基金资助项目(20150533B08)
作者单位
张明 浙江省杭州生态环境监测中心 
唐访良 浙江省杭州生态环境监测中心 
程新良 杭州市淳安生态环境监测站 
徐建芬 浙江省杭州生态环境监测中心 
郑文婷 浙江省杭州生态环境监测中心 
许燕冰 浙江省杭州生态环境监测中心 
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中文摘要:
      通过测定千岛湖柱状沉积物中有机质(OM)、总氮(TN)和总磷(TP)含量,分析其污染分布特征,并评价污染水平。结果表明,千岛湖沉积物中OM、TN、TP平均值分别为1.44%、1.86mg/g、0.89mg/g。空间分布差异明显,城区库湾、新安江干流沿线污染相对较重;垂直分布,OM、TN、TP整体上均从湖底由下而上呈逐步上升变化过程。相关性分析表明,该湖沉积物中OM、TN、TP具有较高的同源性,氮、磷多以有机形式存在。C/N值表明,该湖沉积物中有机质主要来自内源的水生生物分解。评价结果显示,综合污染指数范围为1.1~4.2,该湖整体上处于重度污染水平,TP污染重于TN;有机指数范围为0.04~0.52,整体上属于轻度污染水平。
英文摘要:
      In this paper, the contents of organic matter (OM), total nitrogen (TN) and total phosphorus (TP) in core sediments of Qiandao Lake were determined, the distribution characteristics were analyzed and the pollution status was evaluated. The results showed that the average contents of OM, TN and TP in sediments were 1.44%, 1.86 mg/g and 0.89 mg/g, respectively. The spatial distribution differences were obvious. The pollution in urban bay area and along the main stream of Xin,an River was relatively severe. In terms of vertical distribution, the contents of OM, TN and TP gradually increased from the bottom to the top of the lake. Correlation analysis showed that OM, TN and TP in sediments had high homology. Nitrogen and phosphorus mostly existed in organic form. The ratio of C/N indicated that organic matter in sediments mainly derived from endogenous decomposition of aquatic organisms. The evaluation results showed that the comprehensive pollution index ranged from 1.1 to 4.2, indicating that the lake was heavily polluted on the whole. TP pollution was heavier than TN. The organic index ranged from 0.04 to 0.52, indicating a light pollution level on the whole.
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