水科学进展2017，Vol.28Issue(2)：231-239,9.DOI:10.14042/j.cnki.32.1309.2017.02.008
开敞式潮滩-潮沟系统发育演变动力机制 ——Ⅱ.潮汐作用
Mechanisms underlying the dynamic evolution of an open-coast tidal flat-creek system: Ⅱ: influence of tidal range
摘要
Abstract
To explore the initiation and development of tidal creek network driven by tidal currents, an experimental physical model was established based on the prototype of a silt-muddy tidal flat-creek system on the Jiangsu coast. The evolutional process was simulated with an initially gentle bed slope of about 1%. The movement of flow and sediment, as well as the influence of tidal range on tidal creek development, was analyzed. The results indicated that tidal creek development was influenced by the bed slope variation. For the cases of uniform bed slope, the connection of neighbor-ing tidal creeks, rather than headward erosion as shown by previous studies, resulted in the development of tidal net-works. A strong flow and sediment movement occurred at the early flood and the late ebb stages, and sediment move-ment was most active in the mid-intertidal flat. Tidal range had little influence on the overall pattern formation and the structure of tidal networks. The relationship between the mean drainage path length and the sub-basin area generally followed a power-law function. Tidal networks approached a dynamic equilibrium state earlier under larger tidal ranges which contributed more to the development of the tidal creek widths.关键词
潮滩/潮沟/物理模型/潮汐作用/泥沙运动/水动力条件/江苏海岸Key words
tidal flat/tidal creek/physical model/tidal range/sediment movement/hydrodynamics/Jiangsu coast分类
建筑与水利引用本文复制引用
龚政,耿亮,吕亭豫,周曾,严佳伟,张长宽..开敞式潮滩-潮沟系统发育演变动力机制 ——Ⅱ.潮汐作用[J].水科学进展,2017,28(2):231-239,9.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(2015B25614) The study is financially supported by the National Natural Science Foundation of China (No. 51379003) and the Fundamental Re-search Funds for the Central Universities (No. 2015B25614) . （2015B25614）
