东营港广利港区航道工程潮流场及泥沙骤淤数值模拟

Numerical simulation of tidal field and sand sudden siltation for channel project in Guangli port area of Dongying Port

防波堤和航道工程对工程海域潮流场的影响和大风浪条件下航道骤淤是东营港广利港区工程建设中的关键问题。根据搜集的资料和工程区域水文测验数据,对水动力条件、泥沙特征及岸滩演变规律进行分析研究。建立了包含潮汐和泥沙单元的数值模型,用于模拟工程施工对潮流场的影响,并计算了大风浪条件下的骤淤分布规律。结果表明:东营港广利港区具有往复流运动的不正规半日潮流特征。项目建设对口门区域的潮流场影响最大,以大潮为例,涨急、落急流速最大增幅为0. 32 m/s和0. 16 m/s。10 a一遇风浪条件影响下,口门附近淤强可达0. 5 m以上,最大可达到1. 02 m。

The impact of the breakwater and waterway engineering on the tidal current field of the engineering sea area and the sudden siltation of the navigation channel under the conditions of heavy wind and waves are the key problems in the construction of Guangli Port area of Dongying Port.According to the collected data and hydrology survey data of project site,we studied the hydrodynamic condition,sediment environment,process of beach evolution.A numerical model which contains modules of tide and sediment was established,which was used to simulate the influence of engineering construction on the tidal field and to calculate the distribution rule of sudden siltation under heavy wind and wave conditions.The results showed that the Guangli Port area of Dongying Port has the characteristics of irregular half-day tidal current with reciprocating flow.The engineering construction has the biggest influence on the tidal field in the entrance.Taking spring tide as an example,the biggest increase of maximum flood and ebb are 0.32 m s and 0.16 m s.At the 10 year return period storm conditions,the thickness of siltation around the entrance is more than 0.5 m,the maximum is 1.02 m.