Fluvial process of establishing new equilibrium in river section upstream of strong tide estuary due to constructed reservoirs

The fluvial process of establishing new equilibrium in river section upstream of Aojiang River estuary due to constructed reservoir is studied by means of 1-D tidal flow-sediment mathematical model coupling with 2-D model.The characteristics of hydrology,sediment transport and fluvial process are analyzed.The calculation condition, the techniques for solving some key problems and verification of computation results are presented.The flow and fluvial process are predicted.It is found that the aggradation develops rapidly in the early stage after construction of reservoirs and it tends to degrade afterward until a new equilibrium is established.The aggradation process develops from upstream to downstream and the thickness of deposition at the river bend is smaller than the transition section between two bends.The water depth of navigation at the port will be affected by the sediment deposition.