Publications

2013

Larocque, Lindsey Ann, Mohamed Elkholy, Hanif Chaudhry, and Jasim Imran. “Experiments on Urban Flooding Caused by a Levee Breach”. Journal of Hydraulic Engineering 139, no. 9 (2013): 960-73.

Breached levees often cause extensive flood damage to urban and residential areas; there has been considerable interest in the numerical modeling of flooding of urban areas in recent years. However, comprehensive data that describe the complex flow field in residential areas are not available for validating the numerical models or for determining the extent of such damage. To fill this gap, results are presented of experiments on a scale model used as a test setup that examined the flow field in an urban area attributable to flooding caused by a levee breach.

Larocque, Lindsey Ann, Jasim Imran, and M. H. Chaudhry. “Experimental and Numerical Investigations of 2-D Dam-Break Flow”. Journal of Hydraulic Engineering 139, no. 6 (2013): 569-79.

This paper presents measurements of velocity profiles obtained from idealized dam-break experiments and results from numerical simulations of these experiments. Dam-break flows were generated in the laboratory by suddenly lifting a gate inside a flume for three different upstream heads with a dry-bed downstream condition. Ultrasonic Doppler velocity profilers were used for recording transient velocity profiles at eight different locations upstream and downstream of the removed gate.

Larocque, Lindsey Ann, Jasim Imran, and M. H. Chaudhry. “3-D Numerical Simulation of Partial Breach Dam Break Flow Using LES and K-Epsilon Turbulence Models”. Journal of Hydraulic Research 51 (2013): 145-57.

The shallow water equations, also known as the Saint Venant equations, are commonly used to simulate transient free-surface flows including dam-break and levee-breach flows. However, these solutions give inaccurate results in the near-field of dam-break flow. In this paper, 3D numerical simulations of dam-break flow are done using the large eddy simulation (LES) and the k–ε turbulence models with tracking of the free surface by the volume-of-fluid model. A computational fluid dynamics solver is utilized for this. Results are compared with published experimental data on dam-break flow through a partial breach as well as with results obtained by others using a shallow water model. The results show that both the LES and the k–ε modelling satisfactorily reproduce the temporal variation of the measured bottom pressure. However, the LES model captures better the free surface and velocity variation with time.

2012

Elholy, M., and M. H. Chaudhry. “Investigations on the Trajectory of Large Sandbags”. Journal of Hydraulic Engineering 138, no. 12 (2012): 1060-68.

Investigations undertaken to understand the mechanics of the motion of large sandbags and to compute their trajectories are reported in this paper, along with the details of the experimental setup and procedures. The motion of sandbags is recorded from the side of a flume by a high-definition charge-coupled device (CCD) camera, and the digital particle tracking velocimetry (DPTV) technique is used to track the motion of the bags. An equation is developed for the normalized maximum horizontal settling distance from the experimental data. It is found that the particle velocity normal to the flow depends mainly on the characteristic diameter of the particle and the Froude number of the flow, whereas the particle velocity in the streamwise direction shows lower dependency on the Froude number. Analysis of the particle tumbling shows that the Magnus force may be neglected for the purpose of modeling the trajectories of sandbags in uniform flows. A model of particle motion is developed by solving the Lagrangian equation numerically. Two approaches to computing the trajectory of sandbags are investigated. The results show that the approach in which the drag coefficient is varied based on the orientation of a particle gives better results than if the drag coefficient is kept constant and is based on the broadside orientation of the particle. The results also show that the change in the drag coefficient may be as low as 28% to as high as 76% based on the orientation of the particle with respect to the flow.

Other Publications

Numerical and Experimental Modeling of Levee Breach Including Slumping Failure of Breach Sides
Elafy, E., Tabrizi, A.A., and Chaudhry, M.H.
Journal of Hydraulic Engineering. 144(2) 04017066

Estimation of Discharge through a Levee Breach with Constant Cross Section
Elafy, E., Elkholy, M., Riahi-Nezhad, C.K. and Chaudhry, M.H.
Journal of Hydraulic Engineering. 144 (4)

Effect of soil composition on piping erosion of earthen levees
Elkholy, M., Sharif, Y. A., Chaudhry, M. H. and Imran, J.
Journal of Hydraulic Research. 53 (4), 478-487

Experimental Investigations of Partial-Breach Dam-Break Flows
Elkholy, M., LaRocque, L., Chaudhry, M. H. and Imran, J.
Journal of Hydraulic Engineering. 142 (11), 04016042

Experimental investigation of the effects of soil properties on levee breach by overtopping
Feliciano-Cestero, J. A., Imran, J. and Chaudhry, M. H.
Journal of Hydraulic Engineering. 141 (4)

Closure to “Experimental Investigation of the Effects of Soil Properties on Levee Breach by Overtopping” by Jose A. Feliciano Cestero, Jasim Imran, and M. Hanif Chaudhry
Feliciano Cestero, J. A., Imran, J. and Chaudhry, M. H.
Journal of Hydraulic Engineering

Closure to “Experimental and Numerical Investigations of Two-Dimensional Dam-Break Flows,” by Lindsey Ann LaRocque, Jasim Imran, and M. Hanif Chaudhry
LaRocque, L. A., Imran, J. and Chaudhry, M. H.
Journal of Hydraulic Engineering. 141 (3), 07014022

Experimental Study on the Piping Erosion Process in Earthen Embankments
Sharif, Y. A, Elkholy, M., Chaudhry, M. H., M and Imran, J.
Journal of Hydraulic Engineering. 141 (7), 04015012

Experimental modeling of levee failure process due to overtopping
Tabrizi, A.A., Elafy, E., LaRocque, L.A., Chaudhry, M.H., and Imran, J.
Annual Meeting of the Association of State Dam Safety Officials (ASDSO), September, 2015, New Orleans, LA, USA

Failure Investigations: 2015 South Carolina Flooding
Tabrizi, A.A., LaRocque, L.A., and Bunte-Bisnett, D.
USSD Newsletter, United States Society on Dams, 170, 14-21

Embankment Failures during the Historic 2015 October Flood, South Carolina: Case Study
Tabrizi, A.A., LaRocque, L.A., Chaudhry, M.H., Viparelli, E., and Imran, J.
Journal of Hydraulic Engineering. 143 (8): 05017001

Effects of compaction on embankment breach due to overtopping
Tabrizi, A.A., Elafy, E., and Chaudhry, M.H.
Journal of Hydraulic Research. 55 (2) 236-247

Experiments on Urban Flooding Caused by a Levee Breach
LaRocque, L.A., Elkholy, M., Imran, J., and Chaudhry, M.H.
Journal of Hydraulic Engineering Volume 139 Issue 9 - September 2013

Experimental and Numerical Investigations of 2-D Dam-Break Flow
LaRocque, L.A., Imran, J., and Chaudhry, M.H.
Journal of Hydraulic Engineering- ASCE 139 (6), 569-579

3-D Numerical Simulation of Partial Breach Dam Break Flow Using LES and k-epsilon Turbulence Models
LaRocque, L.A., Imran, J., and Chaudhry, M.H.
Journal of Hydraulic Research- IAHR 51(2), 145-157

Investigations on the Trajectory of Large Sandbags
El Kholy, M., and Chaudhry, M.H.
Journal of Hydraulic Engineering- ASCE 138 (12), 1060-1068

Simulations of the New Orleans 17th Street Canal Breach
Emelen, S., Soares-Frazao, S., Riahi-Nezad, C., Chaudhry, M.H., Imran, J., and Zech, Y.
Journal of Hydraulic Research-IAHR 50 (1), 70-81

Drag and Added Mass Coefficients of Large Sandbags
El Kholy, M., and Chaudhry, M.H.
Journal of Hydraulic Engineering- ASCE 137 (11), 1441-1451

Estimation of Decay Coefficients for Unsteady Friction for Instantaneous, Acceleration-Based Models
Reddy, H.P., Silva-Araya, W.F., and Chaudhry, M.H.
Journal of Hydraulic Engineering- ASCE 138 (3), 260-271

Modeling of One-Dimensional, Unsteady, Free-Surface, and Pressurized Flows
Chaudhry, M.H.
Journal of Hydraulic Engineering- ASCE 137 (2), 148-157

Case Study: 17th Street Canal Breach Closure Procedures
Sattar, A., Kassem, A., and Chaudhry, M.H.
Journal of Hydraulic Engineering- ASCE 134 (11), 1547-1558

 

Conference Papers and Presentations

Experimental Study of Levee Breach. 21st Century Watershed Technology Improving Water Quality and the Environment, ASABE, Guacimo, Limon, Costa Rica
Silva-Araya, W.F., Alva-Solari, L.H., and Chaudhry, M.H. (2011)

Numerical Modeling of Flow Through a Breached Levee and During Levee Closure, ASCE/EWRI World Environmental and Water Resources Congress providence, Rhode Island. ASABE, Guacimo, Limon, Costa Rica
Jia, Y., Zhu, T., and Riahi-Nezad (2010)

Tracking Sandbags Motion during Levee Breach Closure using DPTV Technique,33rd IAHR Congress, Vancouver, Canada
Elkholy, M. and Chaudhry, M.H. (2009)

Flow Velocity Data ion a Levee Breach. International Conference on Fluvial Hydraulics, Izmir, Turkey
Riahi-Nezad, C., Imran, J., and Chaudhry, M.H. (2008)