Journal of Food, Agriculture and Environment
Vol 7,
Issue 3&4,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Experimental investigation of the effects of horizontal footing on bed topography of a 90° bend
Author(s):
A.R. Rezania 1,
M. Shafai Bejestan 2, S.M. Kashefipour 2Recieved Date: 2009-06-10, Accepted Date: 2009-09-29
Abstract:The outer banks in river bends are subject to sever bank erosion due to secondary flows, therefore, it is essential to have some measure for protection. The protection must be based on maximum scour hole. Any measure to reduce the scour hole would be beneficial for protection. In this paper the effect of horizontal footing on reduction of scour hole has been investigated. To reach such goals an experimental of 90 degree bend flume was built and series was installed at outer bank four different elevations of 0, 20, 40 and 60 percent of maximum scour depth. By comparison of the bed topography with and without footing, a maximum scour reduction of more than 44.5% was obtained with footing installed at elevation of 40% of the maximum scour depth. The results of this study reveal that the point of maximum scour hole has been from the outer bank to the center of the flume.
Keywords:Outer bank,
river bend, bank protection, horizontal footingJournal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Environment
Pages: 882-890
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