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Last modified
1/25/2010 6:47:58 PM
Creation date
10/5/2006 1:11:43 AM
Metadata
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Template:
Floodplain Documents
County
Statewide
Basin
Statewide
Title
Verification of Roughness Coefficients for Selected Natural and Constructed Stream Channels in Arizona
Date
1/1/1998
Prepared For
Maricopa County Arizona
Prepared By
USGS
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />Cave Creek above Deer Valley Road <br /> <br />Reach location: <br /> <br />Latitude 33041'13", longitude 112003'32". Reach ends about 1,000 ft above Deer <br />Valley Road. <br /> <br />d50 = 91 mm (030 ft). <br /> <br />Bed-material size: <br />Channel descrintion: <br /> <br />The channel is straight and uniform throughout the reach, The cross sections are <br />trapezoidal in shape, and vegetation of moderate spatial density is along the banks, <br />Bed material found in the reach is mostly small, to medium-sized cobbles. The <br />stream is ephemeral, and flow is regulated by Cave Buttes Dam. <br /> <br />The bank vegetation probably had a discernible effect on total flow retardance for <br />the two larger flows. This bank vegetation was little affected by flows. The <br />suspended, sediment concentration was 228 mg/L for the flow on January 9, 1995, <br />and is assumed to be indicative of suspended-sediment concentrations for all three <br />flows. The suspended sediment was regarded as wash load and was considered to <br />have negligible effects on n values, <br /> <br />Remarks: <br /> <br />Table 7, Flow data and computed roughness coefficients, Cave Creek above Deer Valley Road <br /> <br />Date of flow Discharge, in cubic feet per second Roughness coefficient Rating <br />01-06-95 297 0,033 Estimate <br />01-D9-95 t93 ,033 Good <br />01-10-95 39 ,034 Good <br /> <br />Table 8. Average-reach properties, Cave Creek above Deer Valley Road <br /> Area, Hydraulic Mean velocity, Water- <br /> in square Top width, radius, in feet Froude Total length, Total fall, surface <br />Date feet in feet in feet per second number in feet in feet slope <br />0I-D6-95 58.2 22.8 2,33 5,13 0,57 225 1.03 0,0046 <br />01-09-95 48,9 21.8 2,07 3,96 .49 225 ,65 ,0029 <br />01-10-95 t7,5 17.4 ,98 2.32 .42 225 .55 ,0024 <br /> <br />Cave Creek above Deer Valley Road 27 <br />
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