Foundation and prospect of complete sediment model for the Yangtze estuary

Based on the need of a complete sediment model for the regulation of the Yangtze-River estuary,three aspects of the model are analyzed in this paper,including model theory,model technology and law of sediment movement.Key problems in performing the complete sediment model of the Yangtze-River estuary are put forward,including time scale,distortation rate and selection of model sand.Finally,the possibility of the model is demonstrated.Besides the model technology,the key problem in the model is the proper understanding and modeling of field sediment movement,which decides the precision and success of the model.