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<br />I <br />I <br />I <br />~, <br /> <br /> <br />I, <br />I <br />I <br />I <br />I <br />I <br />_I- <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Lesson 2 <br /> <br />Basic Hydraulics - Participant Workbook <br /> <br />Estimating a stage vs. discharge curve requires some simplifying <br />assumptions. The difficulty in making a channel analysis is associated <br />with the highly variable nature of flow during flood events. There are wide <br />variations in: <br /> <br />. directions of flow <br /> <br />. resistance to flow <br /> <br />. and channel geometry <br /> <br />Simplifying assumptions include: <br /> <br />. One dimensional flow usually is assumed <br /> <br />. Steady flow usually is assumed <br /> <br />. Uniform flow may be assumed in many instances <br /> <br />GENERAL METHODS FOR <br />CHANNEL ANALYSIS <br /> <br />. SLOPE-AREA METHOD <br />. STEP-BACKWATER METHOD <br /> <br />2.24 Channel Analysis Methods <br /> <br />a. Slope area Method (application of Manning's equation) <br /> <br />2-15 <br />