Morphology and Dynamics of Active Bed Forms in the Terek R. Channelстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
Аннотация:Active bed forms of three major classes are formed in Terek lower reaches during summer floods.
They include ripples, dunes of the first order, and dunes of the second order (from smaller to larger), which
commonly form an incomplete hierarchy. The morphology of the bed forms is essentially stochastic and can
be adequately described by probability distribution functions of bed form characteristics for some narrow
ranges of hydraulic flow characteristics. At the same time, the mean values of bed form morphometric characteristics
(length, height, and asymmetry) show stable relationships with flow velocity and depth. The celerity
of active dunes can be adequately described by a modified Snishchenko–Kopaliani formula. The channelforming
sediments that move as bed forms in Terek lower reaches account for 7% of sediment transport rate
of all channel-forming sediments, a value near the lower limit for rivers with sand alluvium.
Keywords: active bed forms, classification, rivers with flood regime, channel-forming sediment transport rate