Effect of spacing of submerged vanes on bed scour around river bends

Abstract

Performance of single array submerged vanes related to bed scour around the river bends has been dealt with in this paper. Experiments were carried out in a curved channel having two consecutive meanders with vanes arranged in a single array fashion for different spacings of vanes, i.e., stream-wise centre-to-centre spacing and vane- to-bank distances. This experimental study reveals that the strength of the secondary circulation induced due to bend flow is reduced with the placement of vanes. This results in less bed scour around the bends. A predictor for the estimation of maximum depth of flow at the outer banks for both the upstream and downstream meanders has been proposed. The estimated maximum flow depths using the proposed predictor compare well with the observed one. © 2006 Taylor & Francis Group, LLC.