非均匀推移质运动参数提取

Extraction of non-uniform bedload movement parameters

推移质运动机理复杂,准确提取推移质颗粒运动参数为推移质运动的微观理论研究提供基础。本文以水槽试验拍摄的视频为基础资料,通过一定方法对其做一系列的处理,将视频中运动推移质颗粒标记出来,得到推移质颗粒的位置坐标,文中给出了由原始视频到提取出推移质颗粒位置坐标的详细过程:通过编程等手段计算出推移质颗粒的一些运动参数,如粒径,运动位移,运动速度,运动和静止时间,对提取结果进行展示,并给出这些参数随时间的变化过程。

Bed load movement parameters are the basis of the microscopic theoretical study of bed load.Based on the bed load experiment video data in this study,an approach was proposed to extract the param-eters of bed load particles. Firstly the video was converted to pictures by image processing method,mark-ing bedload particles and recording the coordinates in images:secondly the parameters of bed load parti-cles such as particle size,displacement,velocity,movement time and rest time were calculated by program-ming method;finally the calculation results of movement parameters were showed,and the changing pro-cesses of these parameters with time were given. The results show that bed load particles parameters canbe obtained well in this study,which provide the basic data for the movement rule of bed load particles.