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
张明 1唐访良 1程新良 2徐建芬 1郑文婷 1许燕冰1
作者信息
- 1. 浙江省杭州生态环境监测中心,浙江 杭州 310007
- 2. 杭州市淳安生态环境监测站,浙江 杭州 311700
- 折叠
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.
Abstract
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 verti-cal distribution,the contents of OM,TN and TP gradually increased from the bottom to the top of the lake.Cor-relation 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 endoge-nous 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.
关键词
有机质/总氮/总磷/沉积物/分布特征/污染评价/千岛湖Key words
Organic matter/Total nitrogen/Total phosphorus/Sediments/Distribution characteristic/Pol-lution assessment/Qiandao Lake引用本文复制引用
基金项目
杭州市社会发展科研攻关基金资助项目(20150533B08)
出版年
2024
NETL
NSTL
维普
万方数据