Progress on suspended sediment concentration remote sensing in nearshore case 2 waters
Progress on suspended sediment concentration remote sensing in nearshore case 2 waters
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发表时间：
2006
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通讯作者：
L. Zhiguo;Zhou Yun-xuan;Jiang Xue-zhong;S. Fang
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作者：
L. Zhiguo;Zhou Yun-xuan;Jiang Xue-zhong;S. Fang
遥感数据以其高的空间分辨率和时间优势，成为近岸海岸带案例2沃茨悬浮泥沙浓度（SSC）监测和提取的重要数据源之一。(1)一般来说，SSC遥感建模技术分为三类。它们分别是基于地面光谱测量的反射率反演方法、基于大气校正的方法和基于大气传播模型的SSC建模方法。(2)SSC的地面反射率反演方法是理论与经验相结合的方法，目前应用较为广泛，反射率与SSC之间的经验数学关系式有线性、对数、负指数、Gordon关系式或几种形式的组合。（3）目前已有的SSC模型精度不能与现场瓶装样品测量的SSC相媲美，应加强水文光谱研究，建立多光谱SSC模型，高空间分辨率和高光谱分辨率的遥感图像融合是SSC遥感反演的发展趋势。
Remote sensing data are among the most important data sources for monitoring and extracting suspended sediment concentration(SSC) in near-shore coastal case 2 waters for its high spatial resolution and temporal advantage.The status of SSC extraction from remote sensing imageries may be summarized as follows.(1) Broadly speaking,SSC remote sensing modeling techniques fall into three categories. They are reflectance inversion methods based on ground spectral measurement against SSC,methods based on atmospheric corrections,and atmospheric propagation model based SSC modeling methods,respectively.(2) The ground reflectance inversion methods for SSC are of a combination of theory and experience,which are employed intensively.The empirical mathematic expressions between reflectance and SSC are in one of the forms of linear,logarithmic,negative exponential,Gordon relation or combinations of previous forms.(3)Available SSC models so far are not satisfied due to their incomparable accuracy to the SSC measured from in situ bottled samples.The authors believe that hydrological spectra study should be strengthened in order to establish a SSC model relating to multiple spectra.The trend for SSC inversion with remote sensed data is the application of fused images with both high spatial and spectral resolution.