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黄、东海悬浮物分布和输运的卫星遥感研究; Distribution and transportation of Suspended particulate matter in the Yellow Sea and East China Sea with satellite Remote Sensing
Thesis Advisor杨顶田
Degree Discipline环境工程
Keyword黄、东海 悬浮物 输送量 遥感 Modis
Abstract悬浮颗粒物是海水的重要组成部分,悬浮物的影响海水的透明度、对海洋的生态环境等产生重要的影响。而且对于大陆近岸海域,受陆源沉积物的影响很深。所以,对于近海悬浮物的研究很有必要。 黄、东海海域受该地区复杂的水动力条件的影响,海水中的悬浮物含量高,季节变化明显、影响范围广,是世界上悬浮物含量最高的海域之一。而且受陆架环流的影响,黄、东海之间的悬浮物处于变动之中。本文首先利用漫衰减系数大小与悬浮物浓度之间的良好相关性,分析悬浮物分布的季节性变化。之后利用2003年春季航次现场观测的悬浮物浓度资料,结合MODIS数据,建立了表层悬浮物浓度反演模型,并利用反演得到的表层悬浮物浓度数据,结合庞重光等基于多个航次实测资料建立的悬浮物垂向浓度预测模型,计算垂向的浓度分布。假定每时每刻海水中的悬浮均处于稳定状态,输入量等于输出量,这样便可计算某一时刻海水中的悬浮物含量。悬浮物输运是一个连续过程,计算出已知时刻的悬浮物含量,利用插值方法,插值出海水中悬浮物含量的变化曲线,计算该时间段海水中悬浮物的总含量即为所求输送量值。在缺少水层流速数据情况下,这是一种简单的可行的输送量估算方法。利用此方法对黄、东海之间的悬浮物输送量进行了估算。
Other AbstractSuspended particulate matter, one of the important components in coastal water, could affect the seawater transparency and Marine ecological environment. In the boundary water of the Yellow Sea and East China Sea, concentration of suspended matter is high and varied seasonally with wide range for the complicated hydrodynamic conditions in the region. It had been regarded that the concentration of suspended solids in the region was the highest in the world oceans. In order to retrieve concentration of suspended solids and variations, the diffuse attenuation coefficient were used in the paper for good correlation with suspended solids concentration. An empirical model of the relationship between diffuse attenuation coefficient and suspended solids concentration was established and used for retrieving sea surface suspended solids with MODIS data. Combined with vertical distribution model developed by Pang et al, water column suspended matter contents were calculated. Assuming that every moment suspended solids in the seawater were in a stable state, in other words, the input is equal to the output, a certain moment of suspended solids contents can be calculated. Considering that the transportation of suspended solids is a continuous process, calculating the content of suspended solids in the known moment and by using the method of interpolation, the interpolation curve of the change of the content of suspended solids in water can be acquired. Then the total content of suspended solids during the period of transporting could be calculated and the result can be regard as the requested delivery. Under the condition of lack current velocity, it is a simple and feasible method for estimating the throughput.
Document Type学位论文
Recommended Citation
GB/T 7714
尹小青. 黄、东海悬浮物分布和输运的卫星遥感研究, Distribution and transportation of Suspended particulate matter in the Yellow Sea and East China Sea with satellite Remote Sensing[D],2016.
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