Communications on Hydraulic and Geotechnical Engineering: Mathematical Modelling of Morphological Processes in Estuaries

摘要

In the present study a mathematical model has been developed for the morphological development in estuaries (ESMOR). The model is aimed for well mixed estuaries since the density flow effect is not taken into account. Further the influence of the wind and short waves has been neglected. The ESMOR model consists of three submodels, viz. the flow model, the sediment transport model and the bed level model. The flow model is constructed from the existing two-dimensional tidal flow model DUCHESS, a simple velocity profile model, and a simplified secondary flow model. The sediment transport is divided into bed load and suspended load transport. The bed load transport is calculated with a transport formula while the suspended load transport is calculated from a depth-integrated model. The ESMOR model has been applied for long term morphological prediction in a part of the Yantze estuary.