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一、引言利用遥感手段研究河口海岸地区混浊水体的泥沙运动(如泥沙来源、扩散范围、输移方向以及含沙量的定量判读等等),是十分有效的。就含沙量定量判渎而言,解决遥感模式问题乃是关键的所在,也就是说要确定遥感数据与悬沙浓度(指水体表层含沙量)的数学关系,或称为悬沙浓度遥感模式。本文以大气物理和海水光学的一些基本概念为基础,力图从理论上导出水体反射率与表层含沙量的关系,並讨论影响这种关系的原因,同时提出反射率与含沙量之间可进行统计分析的理论依据,还对模式进行了研究。二、海洋—大气系统辐射传输简述 1.太阳辐射能在大气中的传输大气的吸收和散射作用导致太阳辐射能量的衰减。为便于分析,可把到达水面的辐射能分成两部分:(1) 太阳光的直接辐射,它直接透过大气层没有产生
I. INTRODUCTION It is very effective to study the sediment movement (such as sediment source, extent of diffusion, direction of sediment transport, sediment concentration and so on) of estuarine and coastal waters using remote sensing. In terms of quantitative determination of sediment concentration, it is the key to solve the problem of remote sensing model, that is to say, the mathematical relationship between remote sensing data and suspended sediment concentration (that is, sediment concentration in water body) mode. Based on some basic concepts of atmospheric physics and seawater optics, this paper attempts to theoretically deduce the relationship between water reflectance and surface sediment concentration and discuss the reasons that affect this relationship. At the same time, it is proposed that the relationship between reflectance and sediment concentration The theoretical basis for statistical analysis, but also on the model were studied. Second, the ocean - atmospheric system radiative transfer Brief 1. Solar radiation in the atmosphere of the transmission of atmospheric absorption and scattering led to the attenuation of solar radiation energy. For ease of analysis, the radiant energy that reaches the water surface can be divided into two parts: (1) direct solar radiation, which is not produced directly through the atmosphere