【作者】 赵洪波；

【导师】 张庆河；

【作者基本信息】 天津大学 ， 港口、海岸及近海工程， 2007， 硕士

【摘要】 我国沿海近岸工程众多,常遭受不同程度台风的侵袭。台风期间产生的大浪和风暴潮极易掀起并输运滩面上的泥沙,泥沙落淤到航道中发生骤淤,对港口通航和作业造成较大影响。在台风及风暴潮作用下,泥沙的运动极为复杂,合理地模拟此种条件下的泥沙运动对于准确预测港口航道工程的骤淤情况具有重要意义。为此,本文将建立一套能够比较真实地反映台风过程中风、浪、流相互影响的水动力模拟模型和泥沙运动模型,用于港口航道工程的风暴骤淤预测,以期为近岸工程的设计提供依据。本文首先引入描述台风场和气压场的计算模式、描述潮流运动的ADCIRC模型、描述波浪运动的SWAN模型以及描述泥沙运动的挟沙力模型。在了解工程区自然条件的前提下,建立了风暴骤淤二维数值模型,并采用实测资料对模型进行了验证计算。最后,把建立的风暴骤淤模型应用于苍南电厂煤港外航道整治工程中,并确定十年一遇的骤淤条件,对不同工程方案的骤淤情况进行模拟和分析,结果表明,建立的模型能够较好地反映在台风天气下泥沙的运动和骤淤情况,可以用于指导工程实践。更多还原

【Abstract】 There are many coastal infrastructures in China, which are attacked frequently by varying typhoon. During the typhoon attacking, the sediment on beaches in nearshore zone are easily suspended and transported by large waves and storm surge. The sudden siltation can occur due to sediment deposit in channel, which may cause serious effects on the harbor navigation and operation. During typhoon and storm surge process, the sediment transport is very complex. Resonable simulation of the sediment transport process will be very important to predict the sudden siltation of harbor and channel accurately. Therefore, a whole hydrodynamic simulation and sediment transport model, which can reflect the mutual effect among wind, wave and tidal current, is developed in this paper. It can be used to predict the sudden siltation due to storm process, and to provide reliance for coastal engineering design.In this paper, the typhoon wind field and atomspheric pressure field model, the ADCIRC model for tidal current simulation, the SWAN model for wind waves simulation and the sediment-carrying capacity model are firstly introduced. After the analysis of the natural conditions of the coastal project in Cangnan, Zhejiang, the 2-D numerical model of sudden siltation is developed and verified by using measured data in site.At last, the numerical model of sudden siltation due to storm is applied to simulate the channel siltation of Cangnan power plant coal harbor. The 10-year return period sudden siltation condition is discussed, and the sudden siltation for different channel design plans are simulated and analyzed. It is shown that the model can reflect the fact of sediment transport and sudden siltation in the typhoon process. The simulated results can be used to guide engineering practice.更多还原