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Water profile computations in non-prismatic compound channels with simple cross-sectional geometry using exchange discharge model

dc.creatorĐorđević, Dejana
dc.creatorStojnić, Ivan
dc.creatorRosić, Nikola
dc.date.accessioned2020-06-29T12:25:31Z
dc.date.available2020-06-29T12:25:31Z
dc.date.issued2017
dc.identifier.isbn0350-0519
dc.identifier.urihttp://grafar.grf.bg.ac.rs/handle/123456789/1988
dc.description.abstractCilj ovog rada je da se stručnoj javnosti prikažu mogućnosti modela razmene količine kretanja (MRKK) u proračunima linije nivoa duž neprizmatičnih korita za veliku vodu (KVV). Reč je o modelu koji je već uspešno primenjivan za procene krive protoka u prizmatičnim KVV, a koji istovremeno pruža mogućnost proračuna nagiba linije energije i linije nivoa kada je poznata vrednost protoka velike vode. Kao takav, model se može koristiti i za potrebe procene rizika od poplava i za rekonstrukciju poplavnog događaja. Model je u ovom radu proveren korišćenjem rezultata merenja u pravolinijskim neprizmatičnim kanalima sa obostrano proširujućim i obostrano sužavajućim plavnim površinama. Razmatrani su i slučajevi blagih i slučajevi naglih proširenja/ suženja. Rezultati proračuna upoređeni su i sa onima koji se dobijaju primenom tradicionalnih modela koji se standardno primenjuju u inženjerskoj praksi. Pokazuje se da tradicionalni modeli potcenjuju nivoe u KVV preko 10%, a da su odstupanja dobijena primenom MRKK manja od 3%. Zadovoljavajuća slaganja postižu se i po pitanju raspodele protoka na glavno korito i plavne površine – odstupanja ne prelaze 3%, a samo za jednu vrednost protoka dostižu 8%.sr
dc.description.abstractThe paper aims at presenting possibilities of the exchange discharge model (EDM) in 1D non-prismatic compound channel flow modelling to the Serbian hydraulic engineering community. The model has been already successfully applied for the estimation of a rating curve in a two-stage channel based on the recorded water level, but it can be also used for the estimation of the slope of the energy grade-line for non-uniform flow calculations in a flooding river once the flood discharge is known. As such, the EDM can be used both in the flood risk assessment and the reconstruction of the flood event. The model is calibrated and tested against the experimental data from straight, non-prismatic channels with symmetrically enlarging and symmetrically narrowing floodplains with different degrees of expansion and contraction (gradual and abrupt expansions / contractions). Moreover, the model results are compared to those obtained with the traditional models that are still used in everyday engineering practice. It is readily demonstrated that traditional models underestimate water levels by more than 10%, while the EDM provides better agreement with measured ones (discrepancies are less than 3%). Acceptable level of agreement is also attained with the discharge distribution between the main channel and floodplains – discrepancies do not exceed 3%, and in one case only they reach 8%.en
dc.language.isosrsr
dc.publisherSrpsko društvo za odvodnjavanje i navodnjavanjesr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37009/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37010/RS//sr
dc.rightsopenAccesssr
dc.sourceVodoprivredasr
dc.subjectkorito za veliku vodu / compound channelsr
dc.subjectlinija nivoa / water profilesr
dc.subjectmodel linijskog tečenja / 1D flow modelsr
dc.subjectrazmena količine kretanja / momentum exchangesr
dc.subjectnagib linije energije / energy slopesr
dc.titleProračun linije nivoa u neprizmatičnom koritu za veliku vodu primenom metode razmene količine kretanja između glavnog korita i plavnih površina (primer korita jednostavne geometrije)sr
dc.titleWater profile computations in non-prismatic compound channels with simple cross-sectional geometry using exchange discharge modelen
dc.typearticlesr
dc.rights.licenseARRsr
dc.citation.epage361
dc.citation.issue288-290
dc.citation.spage349
dc.citation.volume49
dc.description.otherErratum: U jednačini 9 na strani 352, Maningovi koeficijenti u četvrtom članu sa desne strane znaka jednakosti treba da budu kvadrirani (n_gl,u)^2 i (n_gl,n)^2.sr
dc.identifier.fulltexthttp://grafar.grf.bg.ac.rs/bitstream/id/7707/17-Dejana-Djordjevic-i-saradnici-Vodoprivreda.pdf
dc.type.versionpublishedVersionsr


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