水利水电科技进展2017，Vol.37Issue(1)：60-67,8.DOI:10.3880/j.issn.1006-7647.2017.01.011
向家坝下长江干流长河段河道横剖面分形特征
Fractal research of long river channel' s transverse section downstream Xiangjiaba Dam of Changjiang River
摘要
Abstract
Using a navigation-obstructing section downstream the Xiangjiaba Dam of Changjiang River as a research object, a two-dimensional unsteady fractal mathematical model that can meet the requirement for maintaining a minimum water depth was established for statistical analysis of the channel width, and the fractal dimension of the river channel ' s transverse section was calculated, demonstrating one-order fractal dimension characteristics. The results show that the fractal dimension of the channel width has a close relationship with the water depth, the topography of river reach, and the shape of transverse section, demonstrating a general increasing trend of the fractal dimension of the channel width with the increasing water depth for a shoal and a general decreasing trend of the fractal dimension of the transverse section with the increasing flow velocity. Comparison of the fractal dimension of different shoals in the same river reach shows that the fractal dimension is relatively small for a transverse section with smooth topography under the same flow rate from upstream.关键词
分形维数/横剖面分形/数值模拟/非恒定流/通航水力要素/向家坝/长江Key words
fractal dimension/fractal analysis of transverse section/numerical simulation/unsteady flow/navigable hydraulic elements/Xiangjiaba Dam/Changjiang River分类
建筑与水利引用本文复制引用
倪志辉,周舟,吴立春,钟亮,赵健..向家坝下长江干流长河段河道横剖面分形特征[J].水利水电科技进展,2017,37(1):60-67,8.基金项目
国家重点基础研究发展计划(2016YFC0402104) （2016YFC0402104）
重庆市基础与前沿研究计划(cstc2016jcyjA0380) （cstc2016jcyjA0380）
内河航道整治技术交通行业重点实验室开放基金(NHHD-201514) （NHHD-201514）
