【摘要】 海岸围垦工程实施后,将会改变地形及边界条件,并对工程区的水动力及泥沙冲淤产生影响。针对淤泥质海岸的特点,选取适当的经验参数,在平面二维潮流的基础上应用半经验半理论的泥沙冲淤计算方法,并考虑波浪对沉降机率和水流挟沙能力的影响,建立了淤泥质海岸围垦促淤的计算方法。同时,以舟山市钓梁围垦二期工程作为实例进行分析,利用工程区实测水文泥沙资料,确定当地挟沙能力公式参数,并对区内进行冲淤计算,得到冲淤强度的分布,通过实测资料的对比,取得了满意的结果。其中,考虑波浪效应后的计算结果更符合实测资料,波浪对该围垦工程促淤效果的影响比例在0.76%~17.5%之间,不能忽略。更多还原

【Abstract】 After reclamation, the coast will change its terrain and boundary conditions, as well as the hydrodynamic condition and sediment deposition environment in the project region. On the basis of the two-dimensional tidal current model and the sediment deposition calculation method of half experience and half theory, selecting appropriate experience parameters according to the characteristics of muddy coast, and considering wave effect on settlement probability and sediment carrying capacity, this paper successfully established the method of calculating scouring and silting intensity after reclamation on muddy coast. At the same time, in order to verify the method, the research chose Zhoushan Diaoliang reclamation project as an application example. With the observed hydrological and sediment data, we calibrated the parameters of local carrying capacity formula and calculated the scouring and silting intensity, and obtained the density distribution. Comparing with the measured data, the results are credible. However, the calculation results with considering the wave effect was more in line with the measured data, the wave effect ratio ranged from 0.76 % ~ 17.5 %, it could not be ignored.更多还原