太湖水体散射特性及其与悬浮物浓度关系模型

水体散射特性与水环境参数如悬浮颗粒及其浓度密切相关.利用Wetlabs公司研制的水体固有光学特性测量系统,于2006-10～2006-11对太湖水体的散射系数和后向散射系数进行了测量.在对水体散射特性分析的基础上,建立了太湖水体颗粒物后向散射系数的光谱模型.此外,利用后向散射率计算水体折射系数,根据折射系数的变化范围,将水中颗粒物的主导因子分为3种类型：①浮游植物主导;②无机颗粒物主导;③两者共同主导.在对散射系数与无机悬浮物、有机悬浮物、总悬浮物浓度相关性分析的基础上,针对颗粒物主导因子的不同,分别建立了散射系数与无机悬浮物浓度的乘幂关系模型.

Scattering Characteristics of Taihu Lake and Its Relationship Models with Suspended Particle Concentration

Water scattering characteristics are closely related to water quality parameters, such as suspended particles and their concentrations. Through the observing system of water inherent optical properties, which were developed by WETlabs Inc, the backscattering and scattering coefficients of Lake Taihu had been obtained in Oct. 2006 and Nov. 2006. Based on analysis of data, the backscattering coefficient spectra model had been established. In addition, the water refraction indexes were computed by backscattering ratio. According to the change scopes of refraction index, the dominant factors of in-water particles were divided into three categories: (1) phytoplankton; (2) inorganic particles; (3) both of the above. By analyzing the correlations between scattering coefficients with inorganic particle, organic particle and total particle concentration, the relationship between scattering coefficient and inorganic particle concentration was simulated well by power function for three different categories respectively.