Determining the Concentration of Suspended Sediment in the Lower Đáy River (Northern Vietnam) Using MSI Sentinel 2 High Spatial Resolution Data

Abstract: The concentration of suspended sediment is an important parameter in assessing the quality of surface waters. Many studies have shown that reflectance from remote sensing data is strongly related to the concentration of suspended sediment. Results are presented from determining the concentration of suspended sediment in the surface water of Đáy River in northern Vietnam using Sentinel 2 multispectral images with a spatial resolution of 10 meters. The reflectance of the water’s surface, calculated on the basis of the visible and near-infrared channels of the Sentinel 2 image, are compared to in situ data. Regression models are developed on the basis of relationship between the reflectance and the concentration of suspended sediment. The best linear equation among the models is chosen to quantitatively assess the pollution of surface water in this river basin. The results can be used to monitor, evaluate, and manage the quality of surface water. © 2020, Pleiades Publishing, Ltd.