胶州湾潮滩整治工程对潮流泥沙影响及冲淤预测分析

潮滩开挖后回淤问题一直困扰航道建设和港口发展的突出问题，为探究胶州湾北部海湾整治工程在不同开挖方案下潮流场分布情况，本研究通过对胶州湾北部海域进行潮流数值模拟，基于二维平面不可压缩雷诺平均纳维埃-斯托克斯（Navier-Stokes）浅水方程，对比分析两种潮滩开挖方案对航道水动力条件及冲淤变形影响。研究结果表明，工程疏浚后，开挖区及附近海域涨潮流作用明显增强，落潮流深槽流速降低，产生进水加速，出水缓慢的效应，方案二涨潮流作用增强而落潮流减小效应大于方案一。工程完成以后，开挖区有所淤积，方案一潮滩开挖区年平均淤强约15.6cm/a, 方案二约为19.0cm/a，淤积强度由深水区向浅水区逐渐增加，工程疏浚产生的涨潮流增强、落潮流减弱的效应将使淤积加速。

Influence of tidal flat regulation project on tidal current and sediment in Jiaozhou Bay and prediction analysis of erosion and deposition

After the excavation of the tidal beach, the problem of recovery of the stasis has been troubled by the construction of the channel and the development of the port. In order to explore the distribution of trend fields under different excavation schemes, through the numerical simulation of tidal current in the northern sea area of Jiaozhou Bay, Based on two-dimensional plane incompressible Reynolds averaged Navier Stokes (Navier Stokes) shallow water equation, the effects of two tidal flat excavation schemes on channel hydrodynamic conditions and scouring and silting deformation are compared and analyzed. The research results show that after engineering dredging, the rising tide effect in the excavation area and nearby sea areas is significantly enhanced, the flow velocity of the deep trough of the falling tide is reduced, resulting in the effect of accelerated inflow and slow outflow. The rising tide effect in scheme 2 is enhanced, and the decreasing effect of the falling tide is greater than that in scheme 2 Case 1. After the completion of the project, there will be siltation in the excavation area. The annual average siltation intensity of the tidal flat excavation area in scheme I is about 15.6cm/a, and that in scheme II is about 19.0cm/a. The siltation intensity gradually increases from deep water area to shallow water area. The effect of enhanced rising tide and weakened falling tide generated by engineering dredging will accelerate the siltation..