Hydraulics & Waterways

Oral

394842 - Numerical investigation of the effect of river parameters on shear stress

Thursday, June 7
8:30 AM - 10:00 AM
Location: Greenway CD
Co-Authors: Arthur Parola, Louisville, Kentucky, United State – University of Louisville

Numerical investigation of the effect of river parameters on shear stress

Fereshteh Noorbakhsh1, Arthur C. Parola, P.E.2
1 Dept. of Civil and Environmental Engineering, University of Louisville, Louisville,
KY 40292; PH (502) 644-3478; email: f0noor01@louisville.edu.
2 Dept. of Civil and Environmental Engineering, University of Louisville, Louisville,
KY 40292; PH (502) 852-4599; email: acparo01@louisville.edu.

Abstract:
In the design of stream restorations, boundary shear stress (stress) is one of the key parameters in the assessment of the robustness of stream restoration and the risk of morphological failure associated with channel bed and bank erosion and sediment transport. In the present research, the two-dimensional hydrodynamic model TUFLOW (2D Model) is employed to assess the effect of hydraulic parameters (such as flow rate, water surface elevation, and roughness coefficients) on stress in critical regions of restored stream channels. In addition, a sensitivity analysis is conducted to evaluate and to identify the level of influence of each parameter on computed stress. Topography and hydraulic data obtained from monitoring efforts of the restored channel and floodplain of Slabcamp Creek located at Rowan County in Kentucky is used to develop and validate the 2D Model. Based on the computed stresses profile critical areas which may be at highest risk of erosion are identified, and the influence of other parameters on stress in these regions are examined. The results indicate the importance of these parameters in altering the computed stress and the identification of high-stress areas that indicate potential morphological problems. Further discussion about the results is detailed in the context.

Fereshteh Noorbakhsh

PhD Student
University of Louisville

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394842 - Numerical investigation of the effect of river parameters on shear stress



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