This research focused on analyzing and comparing between the results of hydraulic physical modeling and
the results of numerical modeling of continuous block system in river bank protection which is newly developed
in-situ block system. To verify the hydraulic physical modeling and review the effectiveness, the numerical modeling
was needed against the model test results for vegetation application or not. HEC-RAS model was for 1 dimensional
numerical analysis and SMS was for 2 dimensional numerical analysis. The results of the two dimensional numerical
simulation, under the condition of roughness coefficient calibration, show similar and rational consequence against
the physical modeling. These satisfactory results show that the accomplished results of hydraulic modeling and the
predicted results of numerical modeling corresponded reasonably each others.