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dc.contributor.authorBombar, Gökçen
dc.contributor.authorElçi, Şebnem
dc.contributor.authorTayfur, Gökmen
dc.contributor.authorGüney, M. Şükrü
dc.contributor.authorBor, Aslı
dc.date.accessioned2017-03-01T07:32:38Z
dc.date.available2017-03-01T07:32:38Z
dc.date.issued2011-11
dc.identifier.citationBombar, G., Elçi, Ş., Tayfur, G., Güney, M. Ş., and Bor, A. (2011). Experimental and numerical investigation of bed-load transport under unsteady flows. Journal of Hydraulic Engineering, 137(10) , 1276-1282. doi:10.1061/(ASCE)HY.1943-7900.0000412en_US
dc.identifier.issn0733-9429
dc.identifier.urihttp://doi.org/10.1061/(ASCE)HY.1943-7900.0000412
dc.identifier.urihttp://hdl.handle.net/11147/4931
dc.description.abstractThe dynamic behavior of bed-load sediment transport under unsteady flow conditions is experimentally and numerically investigated. A series of experiments are conducted in a rectangular flume (18 m in length, 0.80 m in width) with various triangular and trapezoidal shaped hydrographs. The flume bed of 8 cm in height consists of scraped uniform small gravel of D 50=4.8 mm. Analysis of the experimental results showed that bed-load transport rates followed the temporal variation of the triangular and trapezoidal hydrographs with a time lag on the average of 11 and 30 s, respectively. The experimental data were also qualitatively investigated employing the unsteady-flow parameter and total flow work index. The analysis results revealed that total yield increased exponentially with the total flow work. An original expression which is based on the net acceleration concept was proposed for the unsteadiness parameter. Analysis of the results then revealed that the total yield increased exponentially with the increase in the value of the proposed unsteadiness parameter. Further analysis of the experimental results revealed that total flow work has an inverse exponential variation relation with the lag time. A one-dimensional numerical model that employs the governing equations for the conservation of mass for water and sediment and the momentum was also developed to simulate the experimental results. The momentum equation was approximated by the diffusion wave approach, and the kinematic wave theory approach was employed to relate the bed sediment flux to the sediment concentration. The model successfully simulated measured sedimentographs. It predicted sediment yield, on the average, with errors of 7% and 15% of peak loads for the triangular and trapezoidal hydrograph experiments, respectively.en_US
dc.description.sponsorshipTÜBİTAK (106M274)en_US
dc.language.isoengen_US
dc.publisherAmerican Society of Civil Engineersen_US
dc.relation.isversionof10.1061/(ASCE)HY.1943-7900.0000412en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBed loaden_US
dc.subjectDiffusion waveen_US
dc.subjectKinematic wave theoryen_US
dc.subjectNumerical modelen_US
dc.subjectSediment transporten_US
dc.titleExperimental and numerical investigation of bed-load transport under unsteady flowsen_US
dc.typearticleen_US
dc.contributor.authorIDTR107796en_US
dc.contributor.authorIDTR2054en_US
dc.contributor.institutionauthorElçi, Şebnem
dc.contributor.institutionauthorTayfur, Gökmen
dc.contributor.institutionauthorBor, Aslı
dc.relation.journalJournal of Hydraulic Engineeringen_US
dc.contributor.departmentİYTE, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümüen_US
dc.identifier.volume137en_US
dc.identifier.issue10en_US
dc.identifier.startpage1276en_US
dc.identifier.endpage1282en_US
dc.identifier.wosWOS:000296510400017
dc.identifier.scopusSCOPUS:2-s2.0-80155163287
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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