Author(s): E. Eris; G. Bombar; U. Kavakli
Linked Author(s): Gökçen Bombar
Keywords: No keywords
Abstract: For the ecological aspect, it is well known that vegetation has fundamental functions in the river environment. For fluvial hydraulics, on the other hand, presence of vegetation could be considered as a problem for channel flow capacity due to its roughness. In order to understand the effects of planform areal configuration of flexible vegetation on flow, a set of experiments were performed in the Hydraulics Laboratory of the Department of Civil Engineering, Ege University, in a rectangular flume which is 5 m long, 18 cm wide and 20 cm deep with transparent sides. Experiments were conducted with two different spatial distributions of vegetation, single side (grasses positioned on one half of the flume) and double sided and preserving the total number of grasses same. For each distribution type different downstream flow depths and different discharges were applied and in total 75 runs were performed with different Froude numbers. By conducting experiments without any vegetation the average base head loss for the test section was obtained. Energy losses were calculated using the energy balance and the continuity equations for all scenarios both with and without vegetated conditions. The results were compared and interpreted. Friction factors for each scenario were determined.
Year: 2016