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<br />~ "- \.. <br /> <br />! ! ! <br /> <br />--------------------------- --- <br /> <br />CASE 5 ABUTMENT SET AT EDGE OF CHANNEL, OVEIlIANK FLOW <br /> <br />"( <br />9 <br />.. <br /> <br />IMAGINAIIY <br />INFL UENCE <br />ZONE <br /> <br /> <br />2.75y, <br /> <br />.. <br /> <br />FLOW <br /> <br />ABUTMENT <br /> <br />I- <br /> <br />. <br /> <br />//~ <br /> <br />,"/ <br /> <br />CASE 6 ABUlMENT LENGTH, a, TO FLOW DEPTH, Y1I RATIO> 25 <br /> <br />ff- <br /> <br />I <br /> <br />/ <br />I <br /> <br />1 <br /> <br />r-- <br /> <br />p <br /> <br />CASE 7 ABUTMEIfT SET AT AN ANGLE, e, TO THE FUll <br /> <br />l <br />8\!t <br />Iff <br /> <br />FIGURE 4.2 ABUTMENT SCOUR CASES 5, 6 AND 7 <br />28 <br /> <br />'. <br />. <br />r' <br />. . <br />. <br />. <br />. <br />. <br />. <br />. <br />I /. <br />\. <br /> <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />(, . <br />. <br />