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<br />Solved together with the proper boundary conditions, equations (5) and <br />(6) are known as the complete dynamic wave equations. The meaning of the various <br />terms in the dynamic wave equations are as follows: <br /> <br />Continuity Eouation <br /> <br />Aav = Prism storage <br />ax <br /> <br />VB~ = Wedge storage <br />ax <br /> <br />B~ = Rate of rise <br />at <br /> <br />q = Lateral inflow per unit length <br /> <br />Momentum Eauation <br /> <br />S f = Friction slope (frictional forces) <br /> <br />So = Bed slope (gravitational effects) <br /> <br />~ = Pressure differential <br />ax <br /> <br />v av = Convective acceleration <br />g ax <br /> <br />1 av = Local acceleration <br />g at <br /> <br />The dynamic wave equations are considered to be the most accurate and <br />comprehensive solution to one-dimensional unsteady flow problems in open channels. <br />Nonetheless, these equations are based on specific assumptions, and therefore have <br />limitations. The assumptions used in deriving the dynamic wave equations are as <br />follows: <br /> <br />(1) Velocity is constant and the water surface is horizontal across any <br />channel section. <br /> <br />7-65 <br />