悬沙水体光谱反射率与质量浓度、粒径的相关关系  

Correlations Between the Spectral Reflectance of Water Mass Containing Suspended Sediments and the Concentration and Particle Size of the Suspended Sediments

作　　者：张芸[1] 张鹰[1] 王晶晶[2] 

机构地区：[1]江苏省环境演变与生态建设重点实验室,江苏南京210046 [2]南京大学国际地球系统科学研究所,江苏南京210093

出　　处：《海洋科学进展》2008年第3期340-346,共7页Advances in Marine Science

基　　金：国家自然科学基金项目--潮滩滩面高程的高光谱定量遥感反演方法研究(40606044);国家自然科学基金重点项目--长江流域调水等工程对河口环境的影响及对策(50339010)

摘　　要：根据实验室测得的和野外现场实测的悬沙质量浓度、粒度与光谱数据,分析了不同质量浓度的悬沙水体和同一质量浓度不同粒径大小的悬沙水体的光谱特征,选取了质量浓度的敏感波段,建立光谱反射率与质量浓度、粒径之间的关系模型。分析结果表明:不同质量浓度的悬沙水体光谱反射率具有双峰特征;同一质量浓度的悬沙水体,随着粒径的减小,光谱反射率逐渐增大,粒径大小与反射率呈反比关系;光谱反射率、质量浓度和粒径的指数关系模型能较好地反映三者的关系。Based on the spectral data and the suspended sediment concentration （SSC） and particle size measured both in the laboratory and in the field, the spectral characteristics of water masses with different SSC and with the same SSC but different particle size were analyzed, the sensitive wave bands of SSC were selected and the relationship models between the spectral reflectance of the water mass and the concentration and particle size of the suspended sediments were established. The results have indicated that the spectral reflectance of the water mass with different SSC shows a bi-peak character, whereas in the water mass with the same SSC but different particle size the spectral reflectance increases gradually with decrease in particle size, showing an inverse relation between the particle size and the spectral reflectance. The exponential model of the relation between the spectral reflectance of water mass and the suspended sediment concentration and particle size can reflect their relationships preferably.

关 键 词：光谱反射率 悬沙浓度 粒径 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]