全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
湖泊科学  2007 

淀山湖有色可溶性有机物的光谱吸收特性

DOI: 10.18307/2007.0304

Keywords: 有色可溶性有机物质,光谱吸收系数,淀山湖

Full-Text   Cite this paper   Add to My Lib

Abstract:

探讨了淀山湖水体中有色可溶性有机物(CDOM)的光谱吸收特性,CDOM与叶绿素a、浊度和COD等水质参数的关系,以及不同波段范围内CDOM光谱吸收形状(指数函数斜率S值)的变化。结果表明:淀山湖CDOM吸收系数不高,在355nm波长处的吸收系数变化范围是6.95-10.28m-1,而且湖南区高于湖北区;CDOM吸收系数和叶绿素a、浊度、COD等水质参数的相关性都不高,证明湖中的CDOM主要来自于城镇生活污水和工业废水的排放;CDOM吸收系数在300-500nm范围内随着波长的增加呈指数递减,超过500nm之后呈线性递减,在300-500nm波段范围内指数函数的曲线斜率S为11.7-14.8μm-1,在501-750nm波段范围内波长每增1nm,CDOM的吸收系数减小0.0021m-1。

References

[1]  Kirk J T 0.Light and photosynthesis in aquatic ecosystem.Cambridge:Cambridge University Press,1994.
[2]  Rochelle2Newall E J,Fisher T R.Chromophoric dissolved organic matter and dissolved organic carbon in Chesapeake Bay.Marine Chemistry ,2002,77:23-41.
[3]  Bricaud A,Morel A,Prieur L.Absorption by dissolved organic matter of the sea (yellow substance) in the UV and visible domain.Limnology and Oceanography,1981,26:43-53.
[4]  Keith D J,Yoder J A,Freeman S A.Spatial and temporal distribution of colored dissolved organic matter (CDOM) in Narragansett Bay,Rhode Island:implications for phytoplankton in coastal waters.Estuarine,Coastal and Shelf Science,2002,55:705-717.
[5]  Green S A,Blough N V.Optical absorption and fluorescence properties of chromophoric dissolved organic matter in natural waters.Limnology and Oceanography,1994,39:1903-1916.
[6]  Baltin T.Dissolved organic matter and its optical properties in a blackwater tributary of the upper Orinoco River,Venezuela.Org Geochem,1998,8:561-569.
[7]  马荣华,戴锦芳等.东太湖CDOM吸收光谱的影响因素与参数确定.湖泊科学,2005,17(2):120-126.
[8]  Davis-colley R J.Absorption of light by yellow substance in freshwater lakes.Limnology and Oceanography,1983,32(2):416-425.
[9]  Markager W,Vincent W F.Spectral light attenuation and absorption of UV and blue light in natural waters.Limnology and Oceanography,2000,45(3):642-650.
[10]  张运林,秦伯强等.太湖典型草、藻型湖区有色可溶性有机物的吸收及荧光特性.环境科学,2005,26 (2):142-147.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133