Influence of renovation project in Jiaojiang on estuary dynamic and evolution of river bed

Renovation project of Jiaojiang estuary began in June 1998,according to the measured hydro-data of Jiaojiang Estuary,the change of sediment dynamic was analyzed from Zhapu to Haimen reach.the paper pointed out that the project influences the sediment concentration,sediment transport and sediment size.The results showed that the flow velocity and the ratio of tidal volume in south channel increase,and the south channel scours steadily,but the north channel is changeable.The change of the estuary channel will achieve new equilibrium.