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连云港新建吹泥站工程为淤泥质海滩演变提供了研究实例。观测表明,波浪是造成淤泥质岸滩冲刷的主要动力,而潮流的扩散是泥沙运移的主要动力。海滩演变主要发生在经常性破波作用范围(-3m等深线)以内。淤泥质岸滩剖面的变化与近岸泥沙供应及横向水动力强度分布有关,后者用波浪和潮流底切力表达。本文对此作了定性分析并对海滩冲淤进行了计算,结果与吹泥条件下海滩演变的观测一致。
Lianyungang new blowing station project for the evolution of the muddy beach provides a case study. The observation shows that the waves are the main driving force for the erosion of the muddy shore and the spreading of currents is the main driving force for sediment transport. Beach evolution occurs mainly within the scope of the regular wave (-3m isobath). The variation of silt bank profile is related to the supply of sediment in the nearshore zone and the distribution of lateral hydrodynamic strength, which is expressed by wave and tidal current undercutting force. This paper made a qualitative analysis and calculated the beach scouring and silting. The result is consistent with the observation of beach evolution under the condition of blowing mud.