Liu Shuguang

Hydrological Regime and Morphodynamics of the Yangtze River Mouth Area

The features of the hydrological regime, modern morphological structure, fluviomorphological processes, and the history of formation of the Yangtze River mouth area are discussed. The influence of the huge river water and sediment runoff and tides on the hydrological and morphological processes in the Yangtze River mouth is shown. The possible impact of construction of the large waterworks “Three Gorges” on the hydrological and morphological processes in the Yangtze River mouth is roughly evaluated.

Effects of south-to-north water transfer project on salinity intrusion in Yangtze Estuary.

ABSTRACT Salinity intrusion, as one of the main coastal hazards, has a significant influence to the Yangtze Estuary. To describe the characteristics of salt intrusion, the modified ECOMSED is applied to establish a three dimensional baroclinic salinity transport model. An approach to represent a moving boundary is introduced and the improved model is validated through the observed field data of tidal height, current and salinity distribution. Since the saline intrusion is mainly affected by the upstream discharge and out sea tidal ranges, several combinations of discharge and tidal ranges conditions have been carried out to discuss the impact of saline intrusion due to the South-to-North Water Transfer Project in the dry seasons. Based on the simulation result, the salinity intrusion under different computational conditions is discussed.