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Comparison of 1D and 2D hecras models for the simulation of urban rivers

10.24050/reia.v20i40.1661
Published 2023-12-19
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Abstract

In this research work, a comparative analysis is carried out between the results of Flow velocity and water depth obtained through the implementation of two well-known free-use software, the HEC-RAS 4.1 one-dimensional version and the HEC-RAS 6.0 two-dimensional version. The hydraulic simulation was carried out in a straight section with a uniform trapezoidal geometry of the Medellín river channel where topo-bathymetry and design flows were available. The preliminary results obtained with the HEC-RAS 6.0 two-dimensional version suggest that for straight and uniform sections the simulation results are quite similar to those obtained with the HEC-RAS 4.1 one-dimensional version. It is concluded that the elaboration of both types of models requires a significant degree of experience, however, the one-dimensional model yields values of the hydraulic variables without such a high degree of effort and computational cost, however, it is evident that for the effects of stains of flooding and definition of depths, the use of the two-dimensional model is more convenient since it allows obtaining greater depths.

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