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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />J <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 />. Apply arbitrary water surface elevations to the typical cross-section, <br />calculating total discharges using Manning's Equation (across the cross- <br />section). <br />. Plot or tabulate the assumed elevations with respect to their associated <br />total discharges. This will constitute the stage-discharge curve. <br />. For each subject discharge; graphically (or by tabular interpolation) extract <br />the associated water surface elevation. <br /> <br />C. Typical Cross-sections <br /> <br />88 <br /> <br /> - <br /> -., <br /> "- <br />8 <br />4 <br /> - <br /> <br />CROSS-SECTION(S) <br />CHARACTERISTICS <br /> <br />TYPICAL CROSS-SECTION <br />88 <br /> <br />z <br />o 87 <br />>= <br />~ 87 <br />w <br />irl 87 <br /> <br />87 <br /> <br />. MATHEMATICAL CHANNEL ANALYSIS <br />. REPRESENTATIVE OF STREAM REACH <br />. PERPENDICULAR TO FLOW <br />. ADEQUATE TO CONTAIN FLOW <br /> <br />87 <br /> <br />o ~ ~ 00 00 100 <br />STATION <br /> <br />2.27 Cross Section Characteristics <br /> <br />2.26 Typical Cross Section <br /> <br />Typical cross-sections used for channel analysis with Manning's Equation <br />should be: <br /> <br />. Used when a mathematical channel analysis is to be made <br />. Representative of the subject stream reach <br />. Oriented normal (perpendicular) to the flow at flood stage <br />. Adequate to contain flow <br /> <br />D. Roughness Characteristics <br /> <br />The roughness characteristics or elements which resist flow are quantified <br />in Manning's Equation as the "n-value". <br /> <br />a. Influences on the n-value <br /> <br />2-17 <br />