Performance of a shallow-water model for simulating flow over trapezoidal broad-crested weirs
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU135958" target="_blank" >RIV/00216305:26110/19:PU135958 - isvavai.cz</a>
Result on the web
<a href="http://www.uh.sav.sk/jhh/Find-Issues/All-Issues?kod=67,4" target="_blank" >http://www.uh.sav.sk/jhh/Find-Issues/All-Issues?kod=67,4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2478/johh-2019-0014" target="_blank" >10.2478/johh-2019-0014</a>
Alternative languages
Result language
angličtina
Original language name
Performance of a shallow-water model for simulating flow over trapezoidal broad-crested weirs
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10503 - Water resources
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Hydrology and Hydromechanics
ISSN
0042-790X
e-ISSN
1338-4333
Volume of the periodical
67
Issue of the periodical within the volume
4
Country of publishing house
SK - SLOVAKIA
Number of pages
7
Pages from-to
322-328
UT code for WoS article
000497193600004
EID of the result in the Scopus database
2-s2.0-85076303124