788 KB78 KB199920252023Apusiga Adongo, ThomasBwambale, ErionChikavumbwa, SylvesterJeremaiho, ZechariahNtole, RomainSibale, DavisUmkiza, Etienneletnik:36številka:64str. 31-55ISSN:0352-3551DOI:10.15292/acta.hydro.2023.03COBISSID_HOST:210429443URN:URN:NBN:SI:doc-I008KV6UenFakulteta za gradbeništvo in geodezijoActa hydrotechnicaaccuracydischargeflumesmerilna koritanatančnostopen channelpotopljenostpretoksamočiščenjeself-cleaningsubmergencetok s prosto gladinoReview of hydraulic performance of open-channel flow-measuring flumes| Pregled hidravličnih razmer pri koritih za merjenje pretoka v vodotokih|The review explored various flumes used for open channel flow measurement and provided insight into operational concepts, discharge measurement, range of flow, head loss requirements, degree of accuracy and submergence, advantages, and limitations for use. The reviewed flumes included; Parshall flumes, Montana flumes, Cutthroat flumes, H-flumes, Trapezoidal flumes, Replogle-Bos-Clemmens (RBC) flumes, PalmerBowlus flumes and Central Baffle flumes (CBF). Based on the stage and discharge relationship, the reviewed flumes have a reasonable accuracy of ± 10 % over a wide range of flows. RBC flumes are the most accurate flumes (± 2 %). For flows that deal with a lot of sediments, most flumes have self-cleaning capability except for Palmer-Bowlus flumes and Central Baffle flumes. H-flumes have low resistance to submergence. The submergence transition for H-flumes is only 25-30 %. RBC flumes and Palmer-Bowlus flumes have the highest submergence (90 %). CBF and Palmer-Bowlus flumes need to be improved in order to have self-cleaning capability. Submerged flow corrections need to be developed and published for Palmer-Bowlus flumes and RBC flumes. The reviewed flumes effectively operate with a minimal head loss. The review has provided an insight on selection of an appropriate type of flume for flow measurement in open channelsČlanek obravnava različna korita, ki se uporabljajo za merjenje pretoka pri toku s prosto gladino, podaja vpogled v zasnovo meritev in izračuna pretoka, obravnava natančnost in dopustno stopnjo potopljenosti, ter prednosti in omejitve pri uporabi posameznih korit. Obravnavana so Parshallova korita, korita Montana, korita Cutthroat, H-korita, trapezna korita, Replogle-Bos-Clemmensova (RBC) korita, Palmer-Bowlusova korita in korita s sredinsko oviro (CBF). Če delujejo korita v ustreznih pogojih, lahko merijo pretok z natančnostjo do ±10 %. Korita RBC so najbolj natančna (±2 %). Večina korit ima sposobnost samočiščenja pri tokovih z veliko sedimenti, razen Palmer-Bowlusovih korit in korit CBF. Najmanjšo dovoljeno potopljenost imajo H-korita (25 do 30 %), največjo dovoljeno potopljenost (do 90 %) pa korita RBC in Palmer-Bowlusova korita. Ugotovljeno je, da je treba korita CBF in Palmer-Bowlusova korita spremeniti, če naj bi ta imela samočistilno sposobnost. Za Palmer-Bowlusova korita in korita RBC pa je treba raziskati in objaviti način določanja pretoka v pogojih potopljenosti. Pregledana korita so učinkovita z minimalno izgubo energije. Prikazan je tudi pregled zahtev za pravilno izbiro korita glede na terenske razmere in posebne zahteve ob vgradnji koritTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za gradbeništvo in geodezijo