Investigation of Lithuanian river-channels classification

摘要

The paper reviews the development of river-channels classification (river-channel processes type). A description of the degree of investigation of this point is presented. The importance of river-channels classification to the investigation of subsequent theoretical river bed processes and practical purposes of hydraulic engineering is emphasized. According to the research of river-channel stability criterion / Grishanin invariant channels of Lithuanian rivers are suggested to be classified into straight channels with alternating bars, adapted type and highly meandering channels. It has been proved that the most important parameters of different type river-channels - mean depth, width and yield - have different interdependencies. The type helps to evaluate river-channel stability and trend of deformations: highly meandering channels have the highest transporting capacity, straight channels with alternating bars - the lowest one.