礁冠宽度对珊瑚礁坪波浪增水影响的实验研究

发布时间：2018-04-18 16:48

本文选题：礁冠宽度 + 波浪破碎　；参考：《海洋通报》2017年03期

【摘要】：通过物理模型实验研究岸礁礁冠宽度变化对礁坪上波浪增水的影响,实验采用概化的岸礁和梯形礁冠模型,在一系列规则波工况下分别测试5种不同宽度的礁冠以及无礁冠模型。实验结果表明:礁冠宽度越大,波浪破碎造成的能量衰减越剧烈;礁冠的存在使礁坪上的波浪增水增大,且礁冠宽度越大,增水值越大;增水随礁冠水深的增大而减小,并引入了一对无量纲参数合理地描述了入射波波要素对增水的影响;运用文献中基于能量守恒的理论模型进一步研究了礁冠宽度对增水的影响,并给出模型中的礁形参数与实测的礁冠相对宽度间的经验关系式;通过分析同一礁冠水深控制下,相对增水随着礁冠相对宽度的变化趋势,发现只有在礁冠充分宽的情况下礁冠水深才是控制礁坪上增水的主要因素。
[Abstract]:The effects of the variation of reef crown width on the increase of wave water on the reef floor were studied by physical model experiments, and the generalized reef and trapezoidal reef canopy models were used in the experiment.Five reef crown models with different widths and no reef crown models were tested under a series of regular wave conditions.The experimental results show that the larger the reef crown width, the more severe the energy attenuation caused by wave breakage, and the larger the reef crown width, the larger the water increment value, and the smaller the water increase with the increase of the depth of the reef canopy, and the larger the reef crown width, the greater the water increase value, and the larger the reef crown width is, the greater the water increase value is.A pair of dimensionless parameters are introduced to describe reasonably the influence of incident wave elements on water increase, and the influence of reef crown width on water addition is further studied by using the theoretical model based on energy conservation in literature.The empirical relation between the reef parameters and the measured relative width of the reef crown is given, and the trend of the relative increase of water with the relative width of the reef crown is analyzed by analyzing the control of the water depth of the same reef crown.It is found that only when the reef canopy is wide enough, the depth of the reef canopy is the main factor to control the increase of water on the reef.
【作者单位】：长沙理工大学水利工程学院;大连理工大学海岸和近海工程国家重点实验室;湖南省水沙科学与水灾害防治重点实验室;
【基金】：国家自然科学基金(51309035;51239001) 高等学校博士学科点科研基金新教师类(20134316120004) 大连理工大学海岸和近海工程国家重点实验室开放课题基金(LP1510) 长沙理工大学研究生科研项目(CX2015SS07)
【分类号】：P731.2;P756.8

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