caa a22 4500 44531690X CHVBK 20180317142650.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10749-011-0218-4 doi (NATIONALLICENCE)springer-10.1007/s10749-011-0218-4 Dolgopolova E. Moscow State Civil-Engineering University, Moscow, Russia aut Energy losses and hydraulic friction of open and ice-covered river flow [Elektronische Daten] [E. Dolgopolova] Laws governing flow in open and ice-covered river flows are investigated. The dimensionless Darcy - Weisnbach coefficient is used to evaluate the hydraulic resistance of channel flow. A shape factor is introduced for the cross section of a channel flow, which makes it possible to account for the complex shape of the channel in analyzing hydraulic resistance. A relationship derived to show the dependence of resistance on Reynolds number is used to evaluate the ratio of energy losses during viscous dissipation to the total energy of the flow. Results of calculations based on mock-up formulas are compared with results obtained for flows in rivers and flumes. Springer Science+Business Media, Inc., 2011 open and ice-covered river flows nationallicence dimensionless Darcy — Weisnbach coefficient nationallicence energy loss of flow nationallicence flow velocity nationallicence hydraulic resistance nationallicence Power Technology and Engineering Springer US; http://www.springer-ny.com 45/1(2011-05-01), 17-24 1570-145X 45:1<17 2011 45 10749 https://doi.org/10.1007/s10749-011-0218-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10749-011-0218-4 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Dolgopolova E. Moscow State Civil-Engineering University, Moscow, Russia aut NATIONALLICENCE 773 0- Power Technology and Engineering Springer US; http://www.springer-ny.com 45/1(2011-05-01), 17-24 1570-145X 45:1<17 2011 45 10749 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer