The research results showed: In dry years and normal years, the extent of saltwater intrusion at South Branch and South Channel in Yangtze Estuary will become serious after the East Route Project and the Pumping Works;In rainy years, the water.

Analysis of the saltwater intrusion in the Changjiang estuary during the flood season in extreme drought year;

The main dynamic factors affecting the Changjiang River mouth saltwater intrusion are upstream runoff and outsea tide.

To exploit and utilize the freshwater resources of the Changjiang Estuary,studies on the pollutants of estuarine waters and the spatial and temporal variation of saltwater intrusion are very important.

The applications of the jet theory in the environmental protection,including the ocean disposal project for sewage,the jet dredging,the jet aeration for improving water quality,the cavitation for controlling eutrophication,and the bubble plumes preventing salt water intrusion,were comprehensively summarized and analyzed.

Nine automatic monitoring stations along the path of salt water intrusion were established around the Changjiang Estuary for automatic and real-time monitoring of the surface salinity and water temperature on a continuous basis.