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引用本文:宋玲玲,仇雁翎,张洪恩,刘登国,韩中豪,赵建夫.淀山湖有色可溶性有机物的光谱吸收特性.湖泊科学,2007,19(3):250-254. DOI:10.18307/2007.0304
SONG Lingling,QIU Yanling,ZHANG Hongen,LIU Dengguo,HAN Zhonghao,ZHAO Jianfu.On the light absorption characteristics of colored dissolved organic matter in Lake Dianshan. J. Lake Sci.2007,19(3):250-254. DOI:10.18307/2007.0304
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淀山湖有色可溶性有机物的光谱吸收特性
宋玲玲1, 仇雁翎1, 张洪恩1, 刘登国2, 韩中豪2, 赵建夫1
1.同济大学长江水环境教育部重点实验室, 上海 200092;2.上海市环境监测中心水质监测室, 上海 200030
摘要:
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355 nm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500 nm之后呈线性递减, 在300-500 nm波段范围内指数函数的曲线斜率S为11.7-14.8μm-1, 在501-750 nm波段范围内波长每增1 nm, CDOM的吸收系数减小0.0021 m-1
关键词:  有色可溶性有机物质  光谱吸收系数  淀山湖
DOI:10.18307/2007.0304
分类号:
基金项目:上海市科委2004年重大科技专项资助项目(04DZ12028)
On the light absorption characteristics of colored dissolved organic matter in Lake Dianshan
SONG Lingling1, QIU Yanling1, ZHANG Hongen1, LIU Dengguo2, HAN Zhonghao2, ZHAO Jianfu1
1.Key Laboratory of Yangtze Aquatic Environment, Ministry of Education, Tongji University, Shanghai, 200092, P. R. China;2.Water Environment Division, Shanghai Environmental Monitoring Center, Shanghai, 200030, P. R. China
Abstract:
This paper focuses on the spectral absorption characteristic of colored dissolved organic matter (CDOM) in Lake Dianshan, which is the source of Huangpu River in Shanghai.The relationships between CDOM and water quality parameters, including chlorophyll a (Chi.a), turbidity and chemical oxygen demand (COD) were investigated.Spectral absorption shapes in different bands were studied to find precise S values (absorption spectrum slope coefficient).The results show that absorption coefficients of CDOM are not high, absorption coefficients at 355 nm range from 6.95 to 10.28m-1 and absorption coefficients in the south lake is higher than that in the north lake.Corrections of CDOM and water quality parameters are not high, which show that CDOM mainly comes from urban sewage and industry wastewater.Spectral absorption coefficients of CDOM in the bands from 300 nm to 500 nm exponentially decrease with wavelength increasing while decrease linearly after 500 nm.The S values in the bands from 300 nm to 500 nm changes from 11.7μm-1 to 14.8μm.Absorption coefficients after 500nm decrease 0.0021m-1 per.
Key words:  Colored dissolved organic matter  spectral absorption coefficient  Lake Dianshan
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