山东省黄河三角洲粉沙质海岸港口与海岸工程建设目前正遭受骤冲骤淤灾害威胁，海岸带整体发展滞后于国家《黄河三角洲高效生态经济区发展规划》中关于港口和临港产业区的建设规划。为了改变上述局面，急需厘清粉沙质海岸骤冲骤淤灾害发生机理，提出对应的防灾减灾对策。本项目拟通过室内试验、现场观测、理论分析和数值模拟的方法，揭示风暴过程中复杂动力因素作用下粉沙运动及骤冲骤淤机理，建立一个能够准确描述近岸风-浪-流-泥沙耦合运动机制又能合理预测粉沙质海岸泥沙运动和地形冲淤演变的先进三维数学模型，并进一步针对黄河三角洲沿岸港口提出有效减少航道骤淤的优化设计方案，针对海岸工程提出有利于海岸生态恢复的防骤冲措施。本项目的开展将深化粉沙质海岸骤冲骤淤致灾机理的科学认识，对于促进黄河三角洲高效生态经济区建设和山东省国民经济发展，有着十分重要的科学意义和现实意义。

Project of port and coastal engineering on silty coasts in the Yellow River Delta of Shandong Province is threatened by sudden erosion and siltation disasters. The development of coastal zone lags behind the plan about the ports and port-vicinity industrial zones in “Development Planning of High Efficiency Eco-economic Zone in the Yellow River Delta” issued by the government. In order to change this situation, it is necessary to understand the mechanism of sudden erosion and siltation and provide methods to reduce the disasters. The mechanism of silt transport and sudden siltation and erosion under complex dynamic factors in storm process will be revealed based on the laboratory experiment, field observations, theoretical analysis and numerical simulation. On the basis of breakthrough in mechanism research, a advanced three-dimensional mathematical model is established which can accurately describe the coupling of wind-wave-current-sediment transport in nearshore zone and reasonably predict the sediment transport and morphology evolution on the silty coast. Furthermore, measures or optimal design schemes for reducing the sudden siltation of channel are proposed for the ports along the Yellow River Delta, and measures beneficial to coastal ecological restoration for preventing sudden scour are proposed for coastal engineering project. The implement of this project will deepen the scientific understanding of the disaster-causing mechanism of sudden scour and siltation on the silty coast. It is of great scientific and practical significance to promote the development of the High-Efficiency Eco-economic Zone in the Yellow River Delta and the national economic development of Shandong Province.