Other technical areas of the project belong to Wusong Estuary is the entrance of the Huangpu River to the Yangtze River Estuary. It is an important node for flood discharge from Taihu Lake and storm surge up from the Yangtze River Estuary, as well as the exchange of water and sediment between the Yangtze River Estuary and the Huangpu River. Wusong Estuary has a special geographical location and heavy and complex functions. The study of Wusong Estuary has great theoretical and social and economic value in the study of estuary morphology. For many years, relevant parties have been paying attention to the characteristics and transformation and utilization of the Wusongkou estuary to make it play a more favorable role in flood control, moisture, and navigation. In 2013, the Ministry of Water Resources supported the public welfare industry scientific research project "Research and Application on Optimizing Utilization of Wusongkou Water Potential River Regime and Estuary Shape", aiming to explore and optimize the Wusongkou estuary shape and serve the century-old project of building a sluice at the Huangpu River Estuary. Faced with the problems of busy shipping at Wusongkou, complex hydrodynamic forces, wide influence areas and sensitive river regimes, the project used advanced means such as mathematical models, physical models and ship simulation models to carry out hydrological tests, bend circulation, river regime evolution, and river estuary research in various aspects such as shape optimization and ship navigation, and achieved the following innovations: 1. Innovatively propose ldquo; vorticity; rdquo; quantity to solve the technical problem of quantitative description of unsteady bend circulation intensity. For the unsteady bend circulation at Wusong Estuary under the action of reciprocating tides, the ldquo; vorticity rdquo; quantity is proposed to solve the technical problem of describing the intensity of the unsteady bend circulation. Combined with the high-precision three-dimensional water-sediment model of Wusongkou, the three-dimensional flow structure of the bend circulation is reproduced and the spatio-temporal distribution characteristics of the circulation intensity are revealed. 2. Explore suitable comprehensive variability and solve the technical problem of unifying variability for models at different scales in establishing a physical model of a super-large estuary. The project established a 1:400 ultra-large physical model combining the small-scale Huangpu River and the large-scale Nangang, explored a comprehensive variability of 2.67, and solved the technical problem of unifying the small variability of Huangpu River and the large variability of Nangang in the ultra-large physical model. Combined with the evolution of Wusongkou river regime, the evolution mechanism is revealed due to the joint action of sediment transport by the bend circulation, less sediment from the upper reaches, and the stability of the southern branch Nangang river regime, and the conclusion that the Wusongkou river regime is basically stable in the near future is proposed. 3. A ship navigation simulation model is established, and the ship track characteristics and navigation restriction requirements at Wusongkou are proposed. A ship navigation simulation model for Wusongkou is established to simulate the sailing trajectories of three representative ship types entering and exiting Wusongkou. Taking into account the current situation of Wusongkou and the planned shipping capacity, a restriction condition that the width of the Wusongkou navigation hole should not be less than 238 meters is proposed. 4. The optimal optimization direction of Wusongkou's shape and the control scale for optimal utilization were proposed; for the first time, it was established that the Wusongkou guide embankment area should not be used as a site selection for the Huangpu River tidal gate, providing a major planning basis for the open use of Wusongkou's strategic location. Formulate possible shape optimization plans such as straightening the guide embankment, extending the guide embankment, and retaining the existing guide embankment; use mathematical models, physical models and ship simulation models, and use creative comprehensive evaluation methods to demonstrate and evaluate the advantages and disadvantages of each plan, and propose that retaining the existing guide embankment is the best optimization direction and the optimal utilization control scale with the total width of the Wusongkou section not less than 360m and the bottom elevation not higher than-12.0 m; For the first time, it was revealed that the Wusongkou guide embankment should not be used as the site of the Huangpu River tidal gate, and the water level boundary point of the Huangpu River flood control wall and the control requirements for temporary flood control wall in non-flood seasons were proposed. The conclusion put forward by the study that the Wusongkou guide embankment area is not suitable for building tide gates was adopted by the new round of Shanghai City urban master planning and industry authorities, which strongly supports the functional positioning of the open use and protection of Wusongkou strategic locations; the proposed Huangpu River flood control wall fortification water level demarcation point and non-flood season temporary flood control wall control requirements were adopted by the Shanghai City Control Headquarters and released as design regulations; The proposed results such as estuary bend circulation, ultra-large physical model variability, and estuary ship navigation simulation provide meaningful reference for other estuarine basic and applied research, and provide a basis for decision-making on major projects. Published 11 scientific papers, 1 invention patent, translated a 400,000-word translation.