利用2003年实测的悬浮体样品和遥感反射率数据以及美国NOAA气象卫星AVHRR数据的可见光波段,进行了南黄海辐射沙洲附近海域悬浮泥沙的遥感反演研究。结果发现:悬沙浓度和实测遥感反射率之间存在很好的线性关系(R^2=0.9537,n=39),利用该关系式进行该区悬沙遥感反演取得了较好的结果。遥感反演证明,研究区悬沙浓度值由高至低从沙洲中部向沙洲周围延伸;悬沙的分布呈现出明显的季节性,秋季悬沙浓度值一般为春季的1/5;且秋季悬沙的平面扩散范围要小于春季的扩散范围。以上研究结果可为我国海岸带泥沙实时监测和悬浮泥沙遥感定量研究提供必要的基础资料。
The research on the remote sensing retrieval of the suspended sediment near the radial sand ridges area in the South Yellow Sea was carried out based upon the total suspended matter samples, remote sensing reflectance data investigated in 2003 and the satellite NOAA/AVHRR visible data. The results showed that a robust linear relationship was established between the suspended sediment concentration (SSC) and in situ remote sensing reflectance (R^2 = 0.9537, n = 39), and by using this, the SSC was retrieved from the satellite images with a better precision. The remote sensing retrieval demonstrated that the nearshore area has higher SSC than the offshore. The SSC value is higher in spring than in autumn, and bigger horizontal diffuse range occurs in spring.