1-D and 2-D combined numerical model for flow and suspended sediment transport in Pearl River network and Lingding Sea

Based on the Three Steps Methods and junction control method for suspended sediment,a numerical model for simulating unsteady flow and suspended-sediment transport in river networks is presented.By transferring the water level,discharge and sediment concentration at the interface of some cross sections,a stagger calculation method is established on 1-D network and 2-D Lingding Sea.The calculated results by the coupling model are calibrated with the hydrological data synchronously measured in the Pearl River Delta region and Lingding Sea region in Feb 2001 and July 2003.The good agreement of the calculated results with the measured data of the Pearl River Delta network region,Lingding Sea region,and their intersecting regions shows that the model can be used to describe the hydrodynamic and suspended sediment process of these regions.