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<br />5.5.2.2 Compute the velocity head coefficients for each cross section <br />using Equation (5). <br /> <br />(5) <br /> <br />Where: <br /> <br />oj = The velocity head coefficient for cross section j <br />K = Conveyance of cross section or sub-sect. <br />a = Area of cross section or sub-section. <br />i = Sub-section component, such as channel, right overbank <br />or left overbank. <br /> <br />The velocity head coefficients are computed as follows with "1" being upstream ' <br />and "3" being downstream. <br /> <br />o 1 = 383,860,763 / [(44,756) a /(617.46)2 ] <br />o 1 = 1.6324 <br />02= 743,051,468/ [(57,133) 3 / (635.30) 2 ] <br />02= 1.6081 <br />03= 310,627,553/ [(42,223) 3 / (610.31) 2 ] <br />03= 1.5370 <br /> <br />5.5.2.3 Determine the reach "k" values by determining if the reach is <br />contracting (k=OI. or expanding (k=0.5) using Equations (6) and (7) which were <br />obtained from Reference (2). <br /> <br />(6) IF [oa - 0 u *(aa / au] L 0 THEN k = 0 <br />(7) IF [oa - 0 u *(aa / au] < 0 THEN k = .5 <br /> <br />where: <br /> <br />1-11 <br />