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<br />2. Energy Equation <br /> <br />Energy at Section 1 = Energy at Section 2 + Losses <br /> <br />vi <br />21 + Y1 + - - <br />2g <br /> <br />'12 <br />~ + Y2 + ---.!. <br />2g <br /> <br />+ hL <br /> <br />where <br /> <br />Z = Elevation above some datum, m <br />y = Depth of flow at a point, m <br />V = Mean velocity, m/s <br />hL = Energy head loss, m <br /> <br /><D <br />I <br /> <br />@ <br />I <br /> <br />-- <br /> V12 ---- ~.!lliU' Grade Un hL <br /> __ e <br /> 2g -- <br />- <br /> HVdraur V22 <br /> Ie Grade L' 2g <br /> IOe <br /> Y1 - <br /> Y2 <br /> ","" ... ",' <br /> """,y, , , <br /> Z1 "'" <br /> Z2 <br /> <br />Datum <br /> <br />ENERGY CONCEPT <br /> <br />3.4 <br />