水体多次散射作用对分析模型f值贡献率的影响因素分析  

ANALYSES OF THE INFLUENCE FACTORS OF CONTRIBUTION RATIO OF MULTIPLE SCATTERING PROCESS TO THE VALUE OF G IN WATER BODY

作　　者：黄昌春[1] 李云梅[1] 孙德勇[1] 乐成峰[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,江苏南京210046

出　　处：《海洋湖沼通报》2009年第4期171-178,共8页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金项目(40571110);十一五国家科技支撑计划项目(2008BAC34B05);江苏省2008年度普通高校研究生科研创新计划(CX08B_015Z)资助

摘　　要：基于HYDROLIGHT光学模拟软件模拟水表面以下辐照度比R（0^-）和参数厂值，着重分析多次散射作用对f值的贡献率以及太阳天顶角、风速和bb／（a＋bb）对贡献率的影响，结果表明：多次散射作用对参数f的贡献率受到太阳天顶角、风速和bb／（a＋bb）的共同影响，使得多次散射作用具有一定的时空差异；贡献率Pms在太阳天顶角从0（°）～85（°）的范围内，随太阳天顶角的增加呈现波动状态，但这种波动随bb／（a＋bb）值的增加而减弱，Pms在0m／s到4m／s的范围内存在较大的波动，而当风速增加到4m／s时，几乎不随风速的变化而变化；多次散射作用对参数f的贡献率最大值可以达到24．41％，因此在内陆湖泊高散射特性水体中必须考虑多次散射作用对R（0^-）的影响。Based on the simulated data of R（0^-） and g simulated by the optical simulation software HYDROLIGHT, the contribution ratio influenced by the wind speeds, solar zenith angle and bb/（a＋bb） were analyzed. The result indicates that： the contribution of the multiple scattering process to the value of g is affected by the wind speeds, solar zenith angle, and bb/（a＋bb） together, so that the multiple scattering process have the spatial and temporal dif{erence; the Pms present fluctuate state with the increase of the solar zenith angle in the range of 0°to 85°, but this fluctuation decreases with the increase of bb/（a＋bb） value. Pms have largest fluctuation in the wind speeds range of 0m/s to 4m/s, but have no change with the wind speeds when the wind speeds are bigger than 4m/s; the maximum of contribution of multiple scattering process to the g value can reach to 24.41%, so the influence of multiple scattering process to the R（0^- ） in the inland lake water must be considered.

关 键 词：多次散射 贡献率 HYDROLIGHT 模拟g值 

分 类 号：X87[环境科学与工程—环境工程]