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Last modified
1/25/2010 6:47:58 PM
Creation date
10/5/2006 1:11:43 AM
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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 />Salt River above Interstate 10 <br /> <br />Reach location: <br /> <br />Latitude 33025'53", longitude 111 059'16". Reach begins about 3,000 ft above <br />Interstate 10. <br /> <br />13,300 mil. <br /> <br />d50 = 94 mm (0.31 ft). <br /> <br />Drainal!e area: <br /> <br />Bed-material size: <br />Channel descriution: <br /> <br />The constructed channel has a uniform geometry and cross sections generally are <br />rectangular in shape. Bed material is dominated by medium-sized rounded cobbles. <br />The river was perennial before construction of upstream reservoirs. <br /> <br />Remarks: <br /> <br />Sparse growth of algae sometimes is observed growing on the cobbles following <br />prolonged releases from the upstream reservoirs. Flow appeared to be clear during <br />the three discharge measurements. Suspended-sediment data are not available. <br /> <br />Table 15. Flow data and computed roughness coefficients, Salt River above Interstate 10 <br /> <br />0.030 <br />.034 <br />.038 <br /> <br />Rating <br />Good <br />Good <br />Good <br /> <br />Date of flow <br />02-18-92 <br />01-15-92 <br />01-09-92 <br /> <br />Discharge, in cubic feet per second <br />4,900 <br />2,070 <br />1,000 <br /> <br />Roughness coefficient <br /> <br />Table 16. Average-reach properties, Salt River above Interstate 10 <br /> <br /> Area, in Top width, Hydraulic Mean velocity, in Froude Total length, Total fall, Water-surface <br />Date square feet in feet radius, in feet feet per second number in feet in feet slope <br />02-18-92 1,090 416 2.61 4.50 0.49 1,497 3.71 0.0025 <br />01-15-92 665 405 1.64 3.13 .43 1,497 3.99 .0027 <br />01-09-92 462 399 1.16 2.18 .36 1.497 3.91 .0026 <br /> <br /> 15 <br /> 14 <br /> 13 <br />f- 12 <br />w <br />w <br />u. 11 <br />~ <br />;i 10 <br />0 <br />~ 9 <br />> <br />w <br />--' 8 <br />w <br /> 7 <br /> 6 <br /> <br /> <br />o <br /> <br />40 <br /> <br />80 <br /> <br />120 160 200 240 280 320 360 400 440 480 <br />STATIONING FROM LEFT BANK, IN FEET <br /> <br />Figure llA. Cross-section 1, Salt River above Interstate 10. <br /> <br />44 Verification of Roughness Coefficients for Selected Natural and Constructed Stream Channels in Arizona <br />
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