ALTERNATIVE METHOD FOR RIVER TRAINING WORKS: BANDAL-LIKE STRUCTURES

抄録

In this paper, the applicability of bandal-like structures as an alternative method for traditional river training structures like groins is investigated. This structure is usually used in Indian Sub-Continents for riverbank protection and improvement of navigation conditions in alluvial rivers. The mechanism behind the utilization of this type of structure which affects the flow patterns and sediment transport process was studied through experimental measurements and numerical simulations. During the calculations, the water flow is computed by solving the Reynolds-averaged Navier-Stokes equations in 3D domain. The k model is used for the turbulence closure and the numerical simulation is conducted on the unstructured meshes with the finite volume method. The main characteristics of the sediment erosion/deposition process around the bandal-like structures are clarified. The promising use of bandal-like structures is demonstrated through the comparisons with conventional structures as impermeable groins.