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Issue 15 (4) 2016 pp. 209-226

Marta Kiraga, Zbigniew Popek

Warsaw University of Life Sciences – SGGW

USING A MODIFIED LANE’S RELATION IN LOCAL BED SCOURING STUDIES IN ALUVIAL BED

Keywords: local scour, dynamic balance, Lane’s relation, physical modelling, alluvial rivers
Abstract:

Numerous approaches to the local scour studies have been developed. The research aim was to verify modified Lane’s relation in scope of local scouring phenomenon basing on laboratory studies results. Original Lane’s relation [1955] is applicable in dynamic balance conditions in alluvial rivers context. Original form is not an equation, but a qualitative expression which cannot be directly used to estimate the influence of a change in one parameter on the magnitude of others. Modified version allows transforming it into equation for dynamic equilibrium conditions in steady flow assumption and gives a new opportunity to this principle application. Two physical models of laboratory channel with rectangular cross-sections and glass panels have been constructed, with totally or partially sandy bottom. Model I assumed non-continual sediment transport, because of model construction, i.e. the solid bottom transforms into sandy bottom in the intake part. Model II assumed water structure (the weir with four slots) introducing into laboratory channel with solid bottom in its region, whereas the rest of channel was filled with sand above and below structure, i.e. continuity of sediment transport was assured. Results of research confirmed modified Lane’s relation usability in scope of local scouring phenomenon description in dynamic equilibrium conditions of alluvial sandy bed.

pub/15_4_209.pdf Full text available in in Adobe Acrobat format:
http://www.formatiocircumiectus.actapol.net/volume15/issue4/15_4_209.pdf

DOI: 10.15576/ASP.FC/2016.15.4.209

For citation:

MLA Kiraga, Marta, and Zbigniew Popek. "USING A MODIFIED LANE’S RELATION IN LOCAL BED SCOURING STUDIES IN ALUVIAL BED." Acta Sci.Pol. Form. Cir. 15.4 (2016): 209-226. http://dx.doi.org/10.15576/ASP.FC/2016.15.4.209
APA (2016). . Acta Sci.Pol. Form. Cir. 15 (4), 209-226 http://dx.doi.org/10.15576/ASP.FC/2016.15.4.209
ISO 690 KIRAGA, Marta, POPEK, Zbigniew. USING A MODIFIED LANE’S RELATION IN LOCAL BED SCOURING STUDIES IN ALUVIAL BED. Acta Sci.Pol. Form. Cir., 2016, 15.4: 209-226. http://dx.doi.org/10.15576/ASP.FC/2016.15.4.209
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Streszczenie w języku polskim:
http://www.formatiocircumiectus.actapol.net/tom15/zeszyt4/abstrakt-209.html