Detail publikace

Performance of a shallow-water model for simulating flow over trapezoidal broad-crested weirs

ŘÍHA, J. DUCHAN, D. ZACHOVAL, Z. ERPICUM, S. ARCHAMBEAU, P. PIROTTON, M. DEWALS, B.

Originální název

Performance of a shallow-water model for simulating flow over trapezoidal broad-crested weirs

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Shallow-water models are standard for simulating flow in river systems during floods, including in the nearfield of sudden changes in the topography, where vertical flow contraction occurs such as in case of channel overbanking, side spillways or levee overtopping. In the case of stagnant inundation and for frontal flow, the flow configurations are close to the flow over a broad-crested weir with the trapezoidal profile in the flow direction (i.e. inclined upstream and downstream slopes). In this study, results of shallow-water numerical modelling were compared with seven sets of previous experimental observations of flow over a frontal broad-crested weir, to assess the effect of vertical contraction and surface roughness on the accuracy of the computational results. Three different upstream slopes of the broad-crested weir (V:H = 1:Z(1) = 1:1, 1:2, 1:3) and three roughness scenarios were tested. The results indicate that, for smooth surface, numerical simulations overestimate by about 2 to 5% the weir discharge coefficient. In case of a rough surface, the difference between computations and observations reach up to 10%, for high relative roughness. When taking into account mentioned the differences, the shallow-water model may be applied for a range of engineering purposes.

Klíčová slova

Discharge coefficient; Frontal broad-crested weir; Shallow flow modelling; Rough weir crest

Autoři

ŘÍHA, J.; DUCHAN, D.; ZACHOVAL, Z.; ERPICUM, S.; ARCHAMBEAU, P.; PIROTTON, M.; DEWALS, B.

Vydáno

19. 12. 2019

Nakladatel

VEDA, SLOVAK ACAD SCIENCES

Místo

BRATISLAVA

ISSN

0042-790X

Periodikum

Journal of Hydrology and Hydromechanics

Ročník

67

Číslo

4

Stát

Slovenská republika

Strany od

322

Strany do

328

Strany počet

7

URL

http://www.uh.sav.sk/jhh/Find-Issues/All-Issues?kod=67,4

Plný text v Digitální knihovně

http://hdl.handle.net/11012/200893

BibTex

@article{BUT163283,
  author="Jaromír {Říha} and David {Duchan} and Zbyněk {Zachoval} and Sébastien {Erpicum} and Pierre {Archambeau} and Michel {Pirotton} and Benjamin {Dewals}",
  title="Performance of a shallow-water model for simulating flow over trapezoidal broad-crested weirs",
  journal="Journal of Hydrology and Hydromechanics",
  year="2019",
  volume="67",
  number="4",
  pages="322--328",
  doi="10.2478/johh-2019-0014",
  issn="0042-790X",
  url="http://www.uh.sav.sk/jhh/Find-Issues/All-Issues?kod=67,4"
}