| Based on the in situ measured remote sensing reflectance (Rrs), the suspended matter concentration (SM) and GF-1 WFV imagery in Dalian Changxing Island sea during August to September in 2017, studies the remote sensing retrieval model of suspended matter. The results indicate that, there are two different trends in scatter plots of Rrs and SM. After superimposing the data of other sea areas in Liaodong Bay during the period of 2008-2015 and the data of Changxing Island, it can be preliminarily concluded that the main reasons for the two trends are particle size difference in of dredged and non-dredged area, resulting in differences in optical properties and inversion algorithms. The two algorithms are applied to the GF-1 WFV4 image of Liaodong Bay and Changxing Island coastal sea on September 20, 2017, respectively. The inversion results show, there is a significant underestimation in the Changxing Island coastal sea by the non-dredged area algorithm, however, the dredged area algorithm can better reflect the distribution of suspended matter during dredging construction, and has good engineering value. |
