基于遥感方法反演珠江三角洲西江干流悬浮泥沙分布研究  

Study on the Inversion Model of the Suspended Sediment Concentration at the Pear River Delta Based on Remote Sensing Technology

作　　者：钟凯文[1,2] 刘旭拢[1,2] 解靓[2,3] 孙彩歌[2,3] 

机构地区：[1]广州地理研究所,广州510070 [2]广东省遥感与地理信息应用重点实验室,广州510070 [3]中科院广州地球化学研究所,广州510640

出　　处：《遥感信息》2009年第1期49-52,59,共5页Remote Sensing Information

基　　金：广东省自然科学基金资助项目(6020300);广东重点引导科研计划项目(2007A060303009)

摘　　要：基于定量遥感理论,采用水色光谱仪与传统泥沙测量对珠江同一河段在汛期和非汛期进行水样同步测量的方法,确保建立相关关系数据的同步性;由水色光谱仪测得的光谱值推算出遥感反射率,并等效计算准同步TM图像相应波段的遥感反射率;再由水文测站测出悬浮泥沙浓度,通过对等效算出的TM各个波段遥感反射率和悬浮泥沙浓度这两组数据分别在汛期和非汛期的相关分析,得到8种形式的经验模型。结果表明,在汛期TM3波段光谱值与悬浮泥沙浓度之间的相关系数最高;在非汛期TM3与TM2波段的比值与悬浮泥沙浓度之间的相关系数最高。因此,分别采用相应的模式进行研究区域悬沙浓度反演,效果良好。On the basis of the quantitative remote sensing theories, we measure the water sample of Pear river in the same zone during flood season and beyond the flood season synchronously by SEAWiFS and traditional measure way, and at the same time make sure the correlation of the data simultaneously, then work out the remote sensing reflectance of TM imagery relevant to the spectrum instrument. The hydrologic observation site works out the suspended sediment concentration. Eight kinds of the experiment models are derived from the correlation of the reflectance and the concentration. It is concluded that the spectrum of TM3 measured during flood season correlates best with suspended sediment concentration; and the ratio of TM3 to TM2 has the best correlation with the concentration beyond the flood season. Based on the experiments, the results of inversion are better when corresponding model with each season is applied.

关 键 词：珠江三角洲河段 遥感反射率 悬浮泥沙浓度 TM 反演模式 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]