长江流域资源与环境 >> 2011, Vol. 20 >> Issue (10): 1262-.

• 生态环境 • 上一篇    下一篇

南京近城市河流沉积物营养水平与磷形态的空间分布

叶宏萌 |袁旭音 |徐荆棘   

  1. (1.河海大学文天学院|安徽 马鞍山 243031;2.河海大学环境学院|江苏 南京 210098;3.浅水湖泊综合治理与资源开发教育部重点实验室|江苏 南京 210098
  • 出版日期:2011-10-20

DISTRIBUTION OF PHOSPHORUS SPECIATION AND TROPHIC LEVEL OF SEDIMENT FROM THE PERIURBAN RIVER, NANJING

YE Hongmeng1,3, YUAN Xuyin2,3, XU Jingji2   

  1. (1.Wen Tian College,Hohai University,Maanshan 243031,China;2.College of the Environmental,Hohai University,Nanjing 210098,China;3.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,Nanjing 210098,China
  • Online:2011-10-20

摘要:

近城市河流位于城市与农村的过渡带,其环境现状反映城市化过程对河流的影响。通过不同断面的样品研究了南京近城市河流——秦淮新河沉积物中主要营养元素与磷形态的空间分布,分析其变化特征和污染成因。研究表明,不同河段由于受人为活动和沉积环境的影响营养程度差异较大。河流表层沉积物的TOC、TN和TP范围分别为307~3497 g/kg、830~2 370 mg/kg和447~3 517 mg/kg,磷的形态显示FeP或CaP>OrgP>>AlP>DP,其中FeP和CaP二者之和占TP的70%以上,两者均可指示营养化程度的轻重。通过西善桥段和入江口段柱状沉积物分析表明,营养元素和磷形态垂向上均呈现明显的“沉降降解堆积”三段式变化,西善桥段以FeP为优势形态,占TP的431%~505%,入江口段以CaP为优势形态,占TP的463%~603%。通过不同河流磷含量的对比,表明秦淮新河作为近城市河流,营养水平介于一般的乡村河流与城市河流之间,并且优势形态磷空间分布带有区域性,表明长三角的城市化对近郊河流的影响是局部的

Abstract:

The environmental circumstances of periurban river in the transition zone between urban and country can reflect the effect of urbanization on rivers. This study revealed space characteristics of nutrients and geochemical forms of phosphorus in the sediment from the periurban riverNew Qinhuai River in Nanjing.The statistics data showed discrepanttrophic levels in different sections of the river due to various sewage discharge and sedimentary process. TOC, TN and TP ranged from 307 to 3497 g/kg, 830 to 2 370 mg/kg and 447 to 3 517 mg/kg respectively. The content sequence of phosphorus fractions was FeP or CaP> OrgP>>AlP>DP, in which FeP and CaP accounted more than 70% of TP, and both showed signals of nutritional status. The characteristics of nutrients and phosphorus fractions in Xishanqiaoqiao core and the estuarine core followed a mode marked threestage of "settlementdegradationstacked" changes in contents. FeP was the dominant form and accounting for 431% ~505% of TP in the Xishanqiao core. CaP was the dominant form and accounting for 463%~603% of TP in the estuarine core. The trophic level of New Qinhuai River is between rural river and urban river. The dominant phosphrous fractions are distributed in variant sites. In a way, the urbanization in the Yangtze River Delta does’t affect overall environment of the periurban river

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 张 强.
近40年来长江流域水沙变化趋势及可能影响因素探讨
[J]. 长江流域资源与环境, 2008, 17(2): 257 .
[2] 袁旭音. 污染河道的常量和微量元素特征及指示意义[J]. 长江流域资源与环境, 2008, 17(2): 270 .
[3] 吕东亮. 汉江水质优于长江的原因刍议[J]. 长江流域资源与环境, 2006, 15(Sup1): 102 -104 .
[4] 彭刚华,黄良英. 长江水质评价和预测模型探讨[J]. 长江流域资源与环境, 2006, 15(Sup1): 77 -82 .
[5] 张其成,姚亦锋,蒋成煜. 南京城市滨江带功能演变及现代景观规划研究[J]. 长江流域资源与环境, 2004, 13(1): 30 -34 .
[6] 胡鸿兴,康洪莉,贡国鸿,朱觅辉5,郑文勤5,吴法清,何定富,李振文,耿 栋5. 湖北省湿地冬季水鸟多样性研究[J]. 长江流域资源与环境, 2005, 14(4): 422 -428 .
[7] 张 雷,吴映梅. 长江干流地区区域发展与国家工业化[J]. 长江流域资源与环境, 2005, 14(5): 633 -637 .
[8] 魏 伟,周 婕,许 峰. 大城市边缘区土地利用时空格局模拟——以武汉市洪山区为例[J]. 长江流域资源与环境, 2006, 15(2): 174 -179 .
[9] 李友辉,董增川,孔琼菊. 廖坊水利工程对抚河流域生态承载力的影响分析[J]. 长江流域资源与环境, 2008, 17(1): 148 .
[10] 吴之坤, 张长芹,黄 媛,张敬丽,孙宝玲,. 长江上游玉龙雪山植物物种多样性形成的探讨[J]. 长江流域资源与环境, 2006, 15(1): 48 -53 .