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Uticajni činioci na rečnim ušćima sa izdignutim dnom pritoke
Controls at river confluences with discordant beds
dc.creator | Đorđević, Dejana | |
dc.date.accessioned | 2021-03-04T10:48:03Z | |
dc.date.available | 2021-03-04T10:48:03Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 0352-2733 | |
dc.identifier.uri | https://grafar.grf.bg.ac.rs/handle/123456789/2274 | |
dc.description.abstract | U ovom radu se pomoću modela prostornog tečenja ispituje uticaj četiri izabrana činioca na hidrodinamiku ušća sa izdignutim dnom pritoke. To su: ugao uliva 'alfa', odnos sila inercije reke i pritoke MR, odnos [irina korita pritoke i reke BP / BR i stepen zakrivljenosti trase pritoke Rp / Bp. Razmatraju se asimetrična ušća širokih pravougaonih korita (B / h >> 5) kod kojih je stepen izdignutosti dna korita pritoke iznad dna reke Dzp / hn = 0,5. Cilj je da se projektantima, na osnovu rezultata ovih istraživanja, daju smernice za uređenje rečnih ušća i postavljanje ispusta. Jedan od najbitnijih zaključaka ovog istraživanja je da u linijskom modelu ušća Hagerov koeficijent popravke srednje vrednosti ugla skretanja toka 'delta' na ušću nije konstantan, već da zavisi od ugla uliva i parametra MR. Takođe je utvrđeno da intenzitet komponente sile inercije pritoke koja deluje u pravcu toka reke može biti precenjen i do 30% ako se umesto integracije odgovarajuće komponente količine kretanja po poprečnom preseku za proračun koristi srednja vrednost ugla 'delta'. | sr |
dc.description.abstract | The role of four parameters that are controlling river confluence hydrodynamics at discordant beds confluences is investigated using 3D numerical model. These are: the junction angle 'alpha', the momentum-flux ratio between the river and tributary channels MR, the width-ratio of the two upstream channels BP / BR and the upstream planform curvature Rp / Bp. Only confluences of wide-channels (B / h >> 5) with non-dimensional elevation of the tributary bed of Dzp / hn = 0.5 are considered. The paper aims at providing the designers with the guidelines for river training at confluences and proper positioning of the outlet structures. The main conclusion regarding 1D modelling procedure is that the Hager's correction coefficient for the mean flow angle 'delta' at the tributary entrance to the confluence is not constant, i.e. it depends both on 'alpha' and MR. Additionally, the magnitude of the inertia-force component acting in the main-river direction might be overestimated by 30% if calculated using the mean 'delta'-angle value instead of integrating the corresponding momentum-flux component over the downstream tributary cross-section. | sr |
dc.language.iso | sr | sr |
dc.publisher | Savez građevinskih inženjera Srbije - Beograd | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37009/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37010/RS// | sr |
dc.rights | openAccess | sr |
dc.source | Građevinski kalendar 2012 | sr |
dc.subject | rečno ušće | sr |
dc.subject | river confluence | sr |
dc.subject | izdignuto dno pritoke | sr |
dc.subject | discordant beds | sr |
dc.subject | model prostornog tečenja | sr |
dc.subject | three-dimensional numerical model | sr |
dc.title | Uticajni činioci na rečnim ušćima sa izdignutim dnom pritoke | sr |
dc.title | Controls at river confluences with discordant beds | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.rights.holder | Dejana Đorđević | sr |
dc.citation.epage | 355 | |
dc.citation.rank | M53 | |
dc.citation.spage | 298 | |
dc.citation.volume | 44 | |
dc.identifier.fulltext | https://grafar.grf.bg.ac.rs/bitstream/id/9100/GK2012-DejanaDordevic.pdf | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_grafar_2274 | |
dc.type.version | publishedVersion | sr |