Abstract
This paper describes a dam break experiment on a sloped channel, carried out in a hydraulic flume at UCL for the purpose of computer model validations of extreme events, such as flash floods. An elevated reservoir was situated upstream followed by a 1/20 slope leading up to a flat floodplain. Plexiglas blocks were positioned on the floodplain constituting different urban settlements and creating different obstructions to the flow. The flume was instrumented along its length measuring the change in water depth in the reservoir; the water depth time histories in various locations; the flow patterns and flood front velocity; and lastly the pressure and load on the buildings. The experiments were repeated for different urban settlements, flood intensities (two different initial water depths in the reservoir) and roughness layers along the slope, representative of a vegetated and a non-vegetated hill. In the present study, the experimental results were described qualitatively and compared with theoretical processes and 2D numerical results obtained using OpenFOAM's RAS turbulent model. Water depth, velocity and load measurements were analysed for different cases and it was found that while the 2D model provided a good fit on the slope, the flows generated around the building were more complex 3D formations which lead to inaccuracies. All experiments were repeated multiple times to ensure repeatability and thus the procedure was validated successfully providing a complete dataset that can be used for the validation of computational models for extreme events.
| Language | English |
|---|---|
| Article number | 06006 |
| Number of pages | 8 |
| Journal | E3S Web of Conferences |
| Volume | 40 |
| DOIs | |
| Status | Published - 5 Sep 2018 |
| Event | 9th International Conference on Fluvial Hydraulics, River Flow 2018 - Lyon-Villeurbanne, France Duration: 5 Sep 2018 → 8 Sep 2018 |
ASJC Scopus subject areas
- Environmental Science(all)
- Energy(all)
- Earth and Planetary Sciences(all)
Cite this
Study of dam break flow interaction with urban settlements over a sloping channel. / Stamataki, Ioanna; Zang, Jun; Buldakov, Eugeny; Kjeldsen, Thomas; Stagonas, Dimitris.
In: E3S Web of Conferences, Vol. 40, 06006, 05.09.2018.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Study of dam break flow interaction with urban settlements over a sloping channel
AU - Stamataki, Ioanna
AU - Zang, Jun
AU - Buldakov, Eugeny
AU - Kjeldsen, Thomas
AU - Stagonas, Dimitris
PY - 2018/9/5
Y1 - 2018/9/5
N2 - This paper describes a dam break experiment on a sloped channel, carried out in a hydraulic flume at UCL for the purpose of computer model validations of extreme events, such as flash floods. An elevated reservoir was situated upstream followed by a 1/20 slope leading up to a flat floodplain. Plexiglas blocks were positioned on the floodplain constituting different urban settlements and creating different obstructions to the flow. The flume was instrumented along its length measuring the change in water depth in the reservoir; the water depth time histories in various locations; the flow patterns and flood front velocity; and lastly the pressure and load on the buildings. The experiments were repeated for different urban settlements, flood intensities (two different initial water depths in the reservoir) and roughness layers along the slope, representative of a vegetated and a non-vegetated hill. In the present study, the experimental results were described qualitatively and compared with theoretical processes and 2D numerical results obtained using OpenFOAM's RAS turbulent model. Water depth, velocity and load measurements were analysed for different cases and it was found that while the 2D model provided a good fit on the slope, the flows generated around the building were more complex 3D formations which lead to inaccuracies. All experiments were repeated multiple times to ensure repeatability and thus the procedure was validated successfully providing a complete dataset that can be used for the validation of computational models for extreme events.
AB - This paper describes a dam break experiment on a sloped channel, carried out in a hydraulic flume at UCL for the purpose of computer model validations of extreme events, such as flash floods. An elevated reservoir was situated upstream followed by a 1/20 slope leading up to a flat floodplain. Plexiglas blocks were positioned on the floodplain constituting different urban settlements and creating different obstructions to the flow. The flume was instrumented along its length measuring the change in water depth in the reservoir; the water depth time histories in various locations; the flow patterns and flood front velocity; and lastly the pressure and load on the buildings. The experiments were repeated for different urban settlements, flood intensities (two different initial water depths in the reservoir) and roughness layers along the slope, representative of a vegetated and a non-vegetated hill. In the present study, the experimental results were described qualitatively and compared with theoretical processes and 2D numerical results obtained using OpenFOAM's RAS turbulent model. Water depth, velocity and load measurements were analysed for different cases and it was found that while the 2D model provided a good fit on the slope, the flows generated around the building were more complex 3D formations which lead to inaccuracies. All experiments were repeated multiple times to ensure repeatability and thus the procedure was validated successfully providing a complete dataset that can be used for the validation of computational models for extreme events.
UR - http://www.scopus.com/inward/record.url?scp=85053812446&partnerID=8YFLogxK
U2 - 10.1051/e3sconf/20184006006
DO - 10.1051/e3sconf/20184006006
M3 - Conference article
VL - 40
JO - E3S Web of Conferences
T2 - E3S Web of Conferences
JF - E3S Web of Conferences
SN - 2267-1242
M1 - 06006
ER -