One of the structural methods for flood control is construction of levees on the banks of rivers. In traditional design method, the height of floodwall is computed for a fixed design discharge and uncertainties in design flood determination, river hydraulic conveyance and economic analysis are ignored whereas in the risk analysis method effects of these uncertainties are included. In this paper, details of this method were firstly described and then the heights of floodwalls in Qeshlaq River, as a case study, were calculated by application of the risk analysis method. For this purpose, parameters of the load function were calculated by fitting statistical distributions on maximum daily flows and parameters of the wall resistance function were estimated by consideration of uncertainties associated with Manning coefficient, slope of energy line and geometric characteristics of the sections. Furthermore, in economical analysis effects of hydraulic and hydrologic uncertainties were considered. Results showed that application of the traditional method provided underestimated design values and were less reliable compared with the risk-based design method for the floodwalls of Qeshlaq River. In conclusion, application of risk analysis method for design of floodwalls was recommended taking all technical and economical aspects into consideration.
Sanginabadi, H., & Attari, J. (2011). Risk Analysis Method for Computation of Height of Flood Walls. Journal of Hydraulics, 6(2), 31-44. doi: 10.30482/jhyd.2011.85494
MLA
H. Sanginabadi; J. Attari. "Risk Analysis Method for Computation of Height of Flood Walls". Journal of Hydraulics, 6, 2, 2011, 31-44. doi: 10.30482/jhyd.2011.85494
HARVARD
Sanginabadi, H., Attari, J. (2011). 'Risk Analysis Method for Computation of Height of Flood Walls', Journal of Hydraulics, 6(2), pp. 31-44. doi: 10.30482/jhyd.2011.85494
VANCOUVER
Sanginabadi, H., Attari, J. Risk Analysis Method for Computation of Height of Flood Walls. Journal of Hydraulics, 2011; 6(2): 31-44. doi: 10.30482/jhyd.2011.85494