开敞式潮滩-潮沟系统发育演变动力机制——Ⅰ.物理模型设计及潮沟形态

发布时间：2018-04-02 17:19

本文选题：潮滩　切入点：潮沟　出处：《水科学进展》2017年01期

【摘要】：为研究潮沟发育演变动力机制,建立了以江苏中部粉砂淤泥质潮滩-潮沟系统为原型的降比尺物理模型,模拟在潮汐作用下,潮沟系统从平坦滩面逐渐形成、发育演变至动态平衡状态的过程,并分析了潮沟系统在不同阶段的形态特征。研究结果表明:潮沟系统发育速率先快后慢,最终达到动态平衡状态。采用潮沟发育各阶段潮沟系统的总长度与终态潮沟总长度的比值以及潮沟及其相邻处潮滩的高程变化速率两种方法,均可以衡量潮沟系统的发育程度。潮沟系统发育达到动态平衡后,各级潮沟个数占潮沟总数量的比例基本固定。潮沟的宽度、深度、宽深比均符合对数正态分布。潮沟的宽度与宽深比、深度与宽深比之间均具有幂函数关系。
[Abstract]:In order to study the dynamic mechanism of tidal channel development and evolution, a scale scale physical model based on silty silty tidal flat tidal channel system in central Jiangsu Province was established. It was simulated that the tidal channel system was gradually formed from flat beach surface under tidal action.The process of development to dynamic equilibrium state and the morphological characteristics of tidal trench system at different stages were analyzed.The results showed that the development rate of tidal trench was first fast and then slow, and finally reached the state of dynamic equilibrium.The development of tidal trench system can be measured by using the ratio of total length of tidal channel system to the total length of terminal tidal channel and the rate of elevation change of tidal channel and its adjacent tidal flat in each stage of tidal channel development.The ratio of the number of tidal trenches to the total number of tidal trenches is basically fixed after the development of tidal trench system reaches dynamic equilibrium.The width, depth and ratio of width to depth of the trench are in accordance with the logarithmic normal distribution.There is a power function relationship between width and width ratio, depth and width depth ratio.
【作者单位】：河海大学水文水资源与水利工程科学国家重点试验室;河海大学江苏省海岸海洋资源开发与环境安全重点试验室;中交水运规划设计院有限公司;School
【基金】：国家自然科学基金资助项目(51379003) 中央高校基本科研业务费专项资金资助项目(2015B15814)~~
【分类号】：P737.1

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