太湖水体秋季散射特性及其相关因素分析  

Scattering characteristics and relevant factors in autumn Lake Taihu

作　　者：黄昌春[1] 李云梅[1] 王桥[1] 孙德勇[1] 乐成峰[1] 伍蓝[1] 王利珍[1] 王鑫[1] 

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,南京210046

出　　处：《湖泊科学》2009年第4期594-602,共9页Journal of Lake Sciences

基　　金："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

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.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 In（550nm）/In（756nm）. The correlation coefficients （R^2） are 0.894 and 0.783 respectively. Negative correlation between the baekscattering rate and the concentration of inorganic suspended was found and R^2 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 （R^2） were 0.851 and 0.781 respectively.

关 键 词：太湖 散射特性 折射指数 粒径分布斜率 

分 类 号：P343.3[天文地球—水文科学]