水资源与水工程学报2012，Vol.23Issue(1)：1-5,5.
边界条件对自然河流形成及演变影响机理的实验研究
Experiment on influence mechanism of boundary conditions to the formation and evolution of natural river
摘要
Abstract
Using the natural model method, an indoor natural river has been successfully portrayed with the scouring water. The experiment includes the study of the influence of different initial river geometric boundary conditions on river channel evolution process and different flow conditions. Studies reveal that flow is mostly influence to river stretcher amplitude. There are no necessary relationships among the size of the inflow angle and rivers stretcher range and the changes of river bend degrees, when the inflow angle is 300, changes of river width and curvature are the most obvious. The inflow angle affects the river evolution in a short - term and has a greater impact in the initial stage of evolution. Subjecting to initial boundary conditions, rivers evolution downward is lag and transitivity of curvature changes. Finally, this paper analyzed the sediment sorting phenomena in the process of river evolution.关键词
河流演变/自然模型法/弯曲度/入射角/泥沙分选Key words
river evolution/ natural model method/ curvature/ inflow angle/ sorting of sediment分类
建筑与水利引用本文复制引用
杨树青,白玉川..边界条件对自然河流形成及演变影响机理的实验研究[J].水资源与水工程学报,2012,23(1):1-5,5.基金项目
国家自然科学基金资助项目(50979066) （50979066）
