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FLOOD03477
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Last modified
1/25/2010 6:27:24 PM
Creation date
10/4/2006 11:48:20 PM
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Floodplain Documents
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Title
Velocity Profile, Water-Surface Slope, Bed-Material Size for Selected Streams in Colorado
Date
1/1/1984
Prepared For
CWCB
Prepared By
USGS
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />The Price Model PAA current meter and its solid-cup bucket wheel (fig. 4) <br />were developed at the U.S. Geological Survey Gulf Coast Hydroscience Center. <br />Laboratory experiments indicate that use of the solid-cup bucket wheel virtu- <br />ally eliminates the registration of vertical-velocity components (J.C. <br />Futrell, U.S. Geological Survey, oral cornmun., 1984). Therefore, the Price <br />Model PAA current meter would provide a more accurate reading of longitudinal <br />velocity in turbulent streams than the Price type AA current meter. The <br />solid-cup bucket wheel also is very durable. <br /> <br /> <br />Figure 4.--Price Model PAA current meter. <br /> <br />Current-meter measurements were made by wading or by using a cableway or <br />bridge whenever the stream was too deep or too swift to wade. When measuring <br />from a cableway or bridge a 30-, 50-, 75-, or lOa-pound Columbus weight was <br />used depending on stream depth and swiftness. The current meters were placed <br />0.5 to 0.65 foot above the bottom of the weight. Flow depths were measured by <br />standard techniques (Rantz and others, 1982). <br /> <br />8 <br />
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