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<br />CURRENT <br />VELOCITY <br />( m/sec) <br /> <br /> <br />t <br /> <br /> <br /> <br /> <br />4 <br /> <br />2 <br /> <br />I <br />CROSS-SECTIONAL AREA OF CHANNEL <br />AT FIRST WATER LEVEL INCREMENT <br /> <br /> <br />6 <br />. <br /> <br />CALCULATED <br />RE GRESS ION <br />LINE <br /> <br /> <br />INDICATES RELATION AT <br />WATER LEVEL 4 <br /> <br />2 <br /> <br />CROSS - SECTIONAL AREA (m'l <br /> <br />Fig. 2, Determination of velocity-area relation <br /> <br />28 <br />