Suspended Sediment Transport Modeling of Poyang Lake in the Wet Season Based on Remote Sensing Data

Suspended sediment is one of the important factors of water quality and aquatic ecosystem for lakes. A two-dimensional sediment transport model of Poyang Lake was established in the wet season. The lake substrate data obtained from remote sensing image was used to perform parameter sensitivity analysis of the sediment transport model, and then the model parameters were calibrated based on the insitu measured sediment concentration in the area with different lake substrate type. The model was used to forecast the sediment transport of Poyang Lake during its high water period in 2013. Model validation showed the square root mean error is 19.8 mg/L and the R² is 0.78 for the simulated sediment concentration, revealing a good performance of the model. Spatial distribution of sediment concentration from the model results and remote sensing images showed a satisfactory spatial consistence, further indicating the ability of the model to simulate the sediment transport of Poyang Lake. This study provides a reliable method to monitor the water environment dynamic of lakes and makes a foundation for further studying the water environment dynamic of Poyang Lake.