Spray generation a wave absorbing sea wall under s strong wind and transport process of spray in the leeward direction.

“强风作用下吸波海堤的水雾产生及水柱在背风方向的输运过程”是国家文科部资助的研究课题。结果总结如下：1。吸波海堤水雾的产生与传输过程对在大分县别武港建造的标准截面吸波海堤进行了模型试验。1)在海堤附近，水雾浓度由水雾平流与沉降之间的平衡决定。在远离海堤的区域，喷雾变得非常小，处于平流和扩散的平衡状态。2)得到了估算海堤附近喷雾浓度的流程图。水雾在海滩上的传输过程模型。了解天然海滩和人造结构保护的海滩上的喷雾传输过程之间的差异是非常重要的。从这一角度出发，对海滩模型上的喷雾输运过程进行了实验研究。1)在近海区域，在背风方向，喷雾量和喷雾浓度的垂直分布是均匀的。它们是由喷雾的扩散和沉降之间的平衡决定的。(2)在浅层区域，近海平衡被打破，背风方向浓度迅速下降。3)在地面以上，由于下边界不供给喷雾，且输送的喷雾量很小，形成了喷雾平流与扩散的平衡。

Studies of 'Spray generation from a wave absorbing sea wall under a strong wind and transport process of spary in the leeward direction' have been made with the aid of a grant form the Ministry of Education, Science, Sports and Culture. The results are summarized as follows.1.Spray generation and transport process from a wave absorbing sea wall.2.Model experiments were carried out for a wave absorbing sea wall with a standard cross-section which is built at Beppu Port in Oita Prefecture.1) Near the sea wall, the spray concentration is determined by the equilibrium between the advection of spray and its sedimentation. In a region far from the sea wall, the spray becomes very small and is in the equilibrium between its advection and diffusion.2) A flow chart is obtained to estimate the spray concentration near a sea wall.2.Transport process of spray above a beach model.It is very important to understand the difference between the transport processes of spray above a natural beach and a beach protected by man-made structures. From such a point of view, the transport process of spray above a beach model was investigated experimentally.1) In an offshore zone, the vertical profiles of spray quantity and spray concentration are uniform in the leeward direction. They are determined by the balance between the diffusion of spray and its sedimentation.2) In a shallow region, the balance in an offshore zone is broken and the concentration decreases rapidly in the leeward direction.3) Above the ground, the balance between the advection of spray and its diffusion is formed because no spray is supplied from the lower boundary and very small spray is transported.