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<br />. <br /> <br />d. <br /> <br />Channe 1 characteri st ics for pools, ri ffles, and ; nter- <br />vening reaches. <br /> <br />~..... <br />...J <br />en <br />o <br /> <br />b. Calibration of Model for Observed Flow <br /> <br />The WSP model was then run with the above data deck. The <br /> <br />. <br /> <br />output from this run included predicted segmental velocities <br /> <br /> <br />and depths Cas water surface e 1 evati ons), and the hydraul i c <br /> <br /> <br />gradient (energy slope) at the calibration flow. These outputs <br /> <br /> <br />were checked against observed water surface elevations and <br /> <br /> <br />velocities at the reach-related gage. If it appeared that the <br /> <br /> <br />model values were unreasonable, the original estimates of <br /> <br /> <br />roughness were adjusted to bring about a reasonable degree of <br /> <br /> <br />similarity between the predicted and the empirical data. When <br /> <br /> <br />a state of reasonableness was attained, calibration for the <br /> <br /> <br />observed flow was considered complete. <br /> <br />c. Calibration for Range of Discharges Possible <br /> <br />Having calibrated the mOdel for the observed fl ow, the <br /> <br /> <br />hYdraulic slope was determined and runs were made which served <br /> <br /> <br />to represent depths and velocities occurring over the full <br /> <br /> <br />range of possible flows in a given reach. Again, the roughness <br /> <br /> <br />factor (and occasionally the slope factor) was adjusted to <br /> <br /> <br />achieve reasonab le depth/ve 1 ocity relationships throughout the <br /> <br /> <br />flow range. <br /> <br />. <br /> <br />48 <br />