辐射沙脊群海域悬沙场遥感反演方法  

Remote Sensing Retrieval of Suspended Sediment Concentration Field in Radial Sand Ridges Area

作　　者：潘进[1] 丁贤荣[2] 康彦彦[3] 葛小平[2] 李森[1] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098 [2]河海大学水文与水资源学院,江苏南京210098 [3]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《地理空间信息》2013年第2期82-84,87,共4页Geospatial Information

基　　金：国家973计划资助项目(2010CB429001);国家海洋公益性行业科研专项资助项目(201005006-3);国家科技支撑计划资助项目(2012BAB03B01);江苏近海海洋综合调查与评价资助项目(JS-908-01-02)

摘　　要：利用2006年江苏908调查水文泥沙测验数据和同期MODIS影像建立遥感定量反演模式,获取了半个潮周期的悬沙场以及全潮平均悬沙场,进行了辐射沙脊群海域悬沙场遥感反演方法的研究,并结合悬沙数学模型对结果进行了验证。研究表明,在辐射沙脊群海域,敏感参数(B1-B4)/(B1+B4)的对数模式反演悬沙场精度较高;遥感反演结果在总体上与数学模型计算结果相似,悬沙高值区主要分布在弶港、废黄河口和长江口附近;在细节上比数学模型表现得更精细,能清晰地反映河口、沙洲、水道等地貌对悬沙分布的影响。Suspended sediment field has great significance in the study of sand ridge development and geomorphic evolution,also in the matter of tidal flat reclamation and coastal engineering.In this paper,on the basis of hydrology-sediment data obtained in JS908 investigation in 2006 and contemporaneous MODIS images,remote sensing quantitative retrieval model was established.Suspended sediment concentration distribution maps in different tide levels and mean sediment concentration distribution map of a half tidal cycle were obtained.The retrieval map was compared with the numerical simulation map using suspended sediment dynamic mathematical model.The result showed that:the precision of(B1-B4)/(B1+B4) logarithm mode was high.The remote sensing retrieval map was similar to the numerical simulation map.High-concentration region of suspended sediment were mainly located in near Jianggang,Feihuanghe estuary and Yangtze estuary.Retrieval map had more details than the simulation map.It can reflect clearly the influence of the estuaries,sandbars,waterways on the distribution of suspended sediment,and can provide technical support for the exploration of suspended sediment transport.

关 键 词：辐射沙脊群 遥感反演 悬沙场 MODIS影像 

分 类 号：P208[天文地球—地图制图学与地理信息工程]