基于遥感方法反演悬浮泥沙分布

Study on the inversion model for the suspended sediment concentration in remote sensing technology

摘要: 基于遥感理论,采用地物光谱仪与光电测沙仪对同一水样同步测量的方法,确保建立相关关系数据的同步性;由地物光谱仪测得的光谱值推算出遥感反射率,并等效计算ETM₊图象相应波段的遥感反射率;由光电测沙仪测出悬浮泥沙浓度;通过对等效算出的ETM₊各个波段遥感反射率和悬浮泥沙浓度这两组数据的相关分析,得到4种形式的经验模型.结果表明,TM₄与TM₁波段光谱值的比值与悬浮泥沙浓度之间的相关系数最高,故应用该模式进行研究区域悬沙浓度反演.

Abstract: On the basis of the remote sensing theories,we get the spectrum and the concentration,and at the same time make sure of the correlation of the data simultaneously,then work out the remote sensing reflectance of ETM₊ imagery relevant to the spectrum instrument.The photoelectricity instrument works out the suspended sediment concentration.Four kinds of the experiment models are derived from the correlation of the reflectance and the concentration.The results show that the ratio of TM₄ to TM₁ has the best correlation with the concentration,therefore we can make use of the model to derive suspended sediment distribution