水科学进展2018，Vol.29Issue(1)：109-117,9.DOI:10.14042/j.cnki.32.1309.2018.01.013
开敞式潮滩-潮沟系统发育演变动力机制——Ⅲ.海平面上升影响
Mechanisms underlying the dynamic evolution of an open-coast tidal flat-creek system: Ⅲ: impact of sea level rise
摘要
Abstract
To explore the influence of sea level rise on the evolution of tidal fiat and tidal creek system,adistorted physical model was established,taking a silt-muddy tidal fiat-creek system in the central Jiangsu coastas the prototype.Based on the model,a variety of parameters were analyzed to illustrate the properties of the creek system changed with the sea level rise,such as duration of submergence,drainage density,cross section profile of the tidal channel,etc.Results indicate that the elongation increases more rapid than the elaboration at the initial stage of the creek system development,but both approach a dynamic equilibrium ultimately.Under the pressure of sea level rise,the inundation period increases hence the exposure duration of the tidal fiats decreases,resulting in reduced shaping effects of the shift return fiow on the creek bottom.Both mean unchannelled length and Hortonian drainage length show a decreasing trend,indicating a higher drainage ability of the creek system.In addition,the width/depth ratio follows an approximate lognormal distribution.The cross-section area and the width/depth ratio increase with sea level rise,as well as the distribution range of the width/depth ratio.关键词
潮滩/潮沟/物理模型/海平面上升/动态平衡/江苏海岸/对数正态分布Key words
tidal fiat/tidal creek/physical model/sea level rise/dynamic equilibrium/Jiangsu coast/lognormal distribution分类
建筑与水利引用本文复制引用
龚政,严佳伟,耿亮,朱思谕,李欢,张长宽..开敞式潮滩-潮沟系统发育演变动力机制——Ⅲ.海平面上升影响[J].水科学进展,2018,29(1):109-117,9.基金项目
国家自然科学基金国际(地区)合作与交流项目(51620105005) （地区）
国家自然科学基金资助项目(51379003)The study is financially supported by the National Natural Science Foundation of China ((No.51620105005 （51379003）
No.51379003). （）
