Investigation about Design Parameter of Levee using Numerical Model

Levee breach analysis model is developed with levee failure by river flood. This model can calculate levee overflow based on hydraulic theory, analyze inundation depth on the protected area using these results. The enlargement of levee breach width is changed by levee material properties and formation. Detailed parameters are as follows-porosity, uniformity, friction angle, cohesive strength and slope of levee etc. In this study, levee failure sensitivity on geotechnical design parameters is reviewed using numerical analysis model. And it is supposed to help establish design standard of levee design. For these purposes, sensitivity analysis is performed with levee design parameters - geometric and soil mechanic parameters, and the results can be used for basic data in levee design. The results of sensitivity variation on individual parameters shows that mean diameter have the most effect on the maximun breach flowrate, followed by the up and downstream slope, uniformity, porosity, friction angle, cohesive strength etc.