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<br />Velocity Profiles <br /> <br />For every vertical, velocity profiles were constructed using data from <br />both the standard Price type AA current meter and the prototype Price Model <br />PAA current meter. A typic~l profile resulting from this study, with a loga- <br />rithmic velocity profile superimposed,' is shown in figure 6. In the ratio of <br />point velocity to mean velocity, vlV, the mean velocity V is the mean velocity <br />determined by the vertical-velo~ity curve method for each current meter. The <br />point at which the profile crosses the v/V=1.0 line is the observation depth <br />to total depth ratio at which the point velocity equals the mean velocity. <br /> <br />Water-Surface Slope <br /> <br />Water-surface slope was determined from the water-surface elevations at <br />each site. The average of two measured slope values was taken to represent <br />the stream water-surface slope. <br /> <br />0.2 <br /> <br /> <br />Price AA Current Meter <br />lV=2.69 teet per second) <br />y/Y=O.5 <br /> <br />Price PAA Current Meter <br />(V=2.42 feet per second) <br /> <br />0.0 <br /> <br />Water surface <br /> <br />-+. <br /> <br />~ <br />:c <br />f-_ <br />1>.>- <br />UJ_ <br />O~ <br />Za: <br />OW 0.4 <br />-f- <br />!;(<e <br />>:;: <br />.-----~-u:.--- <br />",0 <br />lll:c <br />o f- 0.6 <br />u.1>. <br />O~ <br />o <br />~ <br />a: <br /> <br />02 <br /> <br />IV=0.6 <br /> <br />0.8 <br /> <br />Y=2.2 feet <br /> <br />1.0 <br />0.0 <br /> <br />0-,4 <br /> <br />0.8 <br /> <br />0.8 <br /> <br />1.0 <br /> <br />1.2 <br /> <br />1.4 <br /> <br />1.6 <br /> <br />RATIO OF POINT VELOCITY TO MEAN VELOCITY IN THE VERTICAL Iv/Vl <br /> <br />Figure 6.--Velocity profiles, Lake Creek above Twin Lakes Reservoir <br />at station 22.9 feet, August 16, 1983. <br /> <br />14 <br />