水科学进展2017，Vol.28Issue(1)：86-95,10.DOI:10.14042/j.cnki.32.1309.2017.01.010
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
Mechanisms underlying the dynamic evolution of an open-coast tidal flat-creek system: I: physical model design and tidal creek morphology
摘要
Abstract
To deepen the understanding of the dynamics underlying tidal creek evolution,a reduced-scale physical model was established based on the prototype of muddy silt tidal flat-creek system on the central Jiangsu coast.Driven by tidal currents,the evolution of tidal creeks was simulated starting from initial uniform bed level to a dynamic equi librium state,and the morphology of tidal creeks was analyzed.The results showed that the tidal creek system developed with a sharp and later a smooth increasing rate.Finally,the tidal creek system achieved a dynamic equilibrium state.The development stages of the tidal creek system could be evaluated with two methods.The first index was the ratio between the total length of the tidal creek system in different experimental stages and the total length at the dy namic equilibrium state.The other was the comparison between the elevation-changing rate of tidal creeks and its adjacent tidal flat at each experimental stage.When the dynamic equilibrium state was reached,the number of ordered tidal creeks kept a substantially constant proportion in comparison to the total number of tidal creeks.The width,depth and the width-to-depth ratio of tidal creeks were in line with a lognormal distribution.It showed a power function exists between the width and the width-to-depth ratio,as well as the depth and the width-to-depth ratio.关键词
潮滩/潮沟/发育演变/物理模型/形态特征/江苏海岸Key words
tidal flat/tidal creek/evolution/physical model/morphological characteristics/Jiangsu coast分类
建筑与水利引用本文复制引用
龚政,吕亭豫,耿亮,周曾,徐贝贝,张长宽..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[J].水科学进展,2017,28(1):86-95,10.基金项目
国家自然科学基金资助项目(51379003) （51379003）
中央高校基本科研业务费专项资金资助项目(2015B15814) （2015B15814）
The study is financially supported by the National Natural Science Foundation of China (No.51379003) and the Fundamental Research Funds for the Central Universities(No.2015B15814). （No.51379003）
