| 摘要: |
| 本文介绍了海滩及近岸浅水区使用的两种推移质捕沙器的结构 及使用方法,并分析了部分测量结果。测量表明,中潮线以下海滩及近岸浅水区内,推移质沙的运动方向基本上和波能的传递方向一致。据此关系,提出了直接运用 波能流和推移质沙量的函数关系来计算推移质输沙量的方法,它不同于常用的只利用波能的沿岸分量的计算方法。 |
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| FIELD MEASUREMENT OF THE TRAVELLING SAND MOVEMENTIN THE COASTAL ZONE |
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| Abstract: |
| The travelling sand and some part of the saltational sand were measured with trap on the beach of Baishakou, Shandong Province and on the submarine bar off Fangcheng Port, Guangxi Province. The result shows that movement direction of the travelling sand is generally consistent with progressive direction of wave energy flux from middle tidal level to shallow region where sand is being moved by wave. Meanwhile, transport rate of sand is the function of the progressive wave energy flux. Therefore, calculation of back setting volume in the waterway can be immediately based on the progressive wave energy flux and measured transport coefficient of sand with trap, rather than longshore component of the wave energy flux. The waterway is like a pond where sand will settle down. Travelling sands coming into the waterway are difficult to go out. Therefore, gross transport rate can be used for the calculation of back setting volume of the travelling sand in the waterway. In other words, back setting volume in the waterway is considered the sum of the transport rate of sand from different directions, i.e. Qg=ΣKiEi. |
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