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引用本文:黄昌春,李云梅,王桥,孙德勇,乐成峰,伍蓝,王利珍,王鑫.太湖水体秋季散射特性及其相关因素分析.湖泊科学,2009,21(4):594-602. DOI:10.18307/2009.0420
HUANG Chuangchun,LI Yunmei,Wang Qiao,SUN Deyong,LE Chengfeng,WU Lan,WANG Lizhen,WANG Xing.Scattering characteristics and relevant factors in autumn Lake Taihu. J. Lake Sci.2009,21(4):594-602. DOI:10.18307/2009.0420
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太湖水体秋季散射特性及其相关因素分析
黄昌春, 李云梅, 王桥, 孙德勇, 乐成峰, 伍蓝, 王利珍, 王鑫
南京师范大学虚拟地理环境教育部重点实验室, 南京 210046
摘要:
水体散射特性的研究是水色遥感和水生态学研究中重要的组成部分.通过对2007-11-08至2007-11-21在太湖获取的水体固有光学属性和室内水样分析数据的分析,研究太湖水体散射特性及其相关因素.结果表明,太湖水体散射系数与波长之间存在幂函数递减规律,平均幂指数为-0.82±0.21,变异系数为25.39%;粒径分布斜率与幂指数以及散射系数ln(550nm)/ln(756nm)之间存在线性相关,R2分别为0.894和0.783;后向散射率与无机悬浮物浓度之间指数负相关R2=0.854;折射指数与无机悬浮物浓度和无机物与有机物的比例之间指数负相关,R2分别为0.851和0.781.
关键词:  太湖  散射特性  折射指数  粒径分布斜率
DOI:10.18307/2009.0420
分类号:
基金项目:“十一五”国家科技支撑计划项目“基于环境一号等国产卫星的大型水体环境遥感监测应用技术与软件研发”(2008BAC34B05);江苏省2008年度普通高校研究生科研创新计划(CX08B_015Z)联合资助
Scattering characteristics and relevant factors in autumn Lake Taihu
HUANG Chuangchun, LI Yunmei, Wang Qiao, SUN Deyong, LE Chengfeng, WU Lan, WANG Lizhen, WANG Xing
Key Laboratory of Virtual Geographic Environment, Ministry of Education, Nanjing Normal University, Nanjing 210046, P. R. China
Abstract:
Characteristic of water scattering is very important for researches on water color remote sensing and aquatic ecology. The inherent optical properties of water samples collected in Lake Taihu from Nov. 8 to Nov. 21 in 2007 were analyzed, and the scattering characteristics and relative factors were researched. The results showed that, the scattering coefficient was reduced with increasing wavelength according to power function. The average power index is -0.82±0.21, and the variation coefficient is 25.39%. Both slope and power of the particle size distribution function are linearly correlated with the scattering coefficient of ln(550nm)/ln(756nm). The correlation coefficients (R2) are 0.894 and 0.783 respectively. Negative correlation between the backscattering rate and the concentration of inorganic suspended was found and R2 was 0.854. Correlations between refractive index and the inorganic suspended solids concentration and between the ratio of inorganic and organic were negative, and the coefficients (R2) were 0.851 and 0.781 respectively.
Key words:  Lake Taihu  scattering characteristics  refractive index  particle size distribution slope
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