RT - Journal Article T1 - Experimental Investigation on the Effects of Horizontal Footing on Topography of Bed in 90o Bend JF - ijwmse YR - 2009 JO - ijwmse VO - 3 IS - 6 UR - http://jwmsei.ir/article-1-99-en.html SP - 27 EP - 38 K1 - Bend K1 - Erosion hole K1 - Horizontal Footing K1 - Bank protection and Bed Level. AB - The outer banks in river bends are subject to sever bank erosion due to secondary flows. Therefore, itis essential to have some measurements for protection. The protection must be based on maximum scourhole. Any measurements to reduce the scour hole would be beneficial for protection. In this paper the effectof horizontal footing on reduction of scour hole has been investigated. To reach such goals, an experimentwith a 90 degree flume was carried out and series of horizontal footing were installed at outer bank in fourdifferent 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 morethan 44.5% was obtained with footing installed at elevation of 40% of the maximum scour depth. Theresults of this study reveal that the point of maximum scour hole has been displaced from the outer bankto the center of the flume. LA eng UL http://jwmsei.ir/article-1-99-en.html M3 ER -