Dependence of saltation parameters on bed roughness and bed porosity

0377138 - ÚH 2013 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Kharlamova, Irina - Vlasák, Pavel
Dependence of saltation parameters on bed roughness and bed porosity.
Engineering Mechanics 2012. Prague: ITAM AS CR, v. v. i., 2012 - (Náprstek, J.; Fischer, C.), s. 625-629. ISBN 978-80-86246-40-6.
[Engineering Mechanics 2012 /18./. Svratka (CZ), 14.05.2012-17.05.2012]
Grant CEP: GA ČR GA103/09/1718
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: saltation parameters * saltation length * saltation height * bed structure * normal distribution of bed particles * bed roughness
Kód oboru RIV: BK - Mechanika tekutin

In numerical models of bed load transport a bed structure of channel could be described by two parameters, a size of bed particles and a standard deviation of normal distribution of bed particles in the vertical direction. The present paper deals with the effect of bed parameters on average length and height of one jump of saltating particle. A new formula was proposed for bed roughness based on size and standard deviation of the normal distribution of the bed particles. The dependences of length and height of the jump on the diameter of the saltating and bed particles were determined for different variation of vertical distribution of the bed particles.
Trvalý link: http://hdl.handle.net/11104/0209381