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<br />Hassayampa River near Arlington
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<br />Reach location:
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<br />Draina!!e area:
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<br />Bed-material size:
<br />Channel descriotion:
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<br />Remarks:
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<br />Latitude 33020'50", longitude 112'20'30". Reach begins about 1,000 ft downstream
<br />from streamflow'gaging station 09517000, Hassayampa River near Arlington.
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<br />1,471 mil.
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<br />Low,flow channel = 87 mm (0.28 ft); Overbank area = 0,53 mm (0.0017 ft).
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<br />The channel is straight and unifonn throughout the study reach, and cross sections
<br />are trapezoidal in shape. The low,flow channel is approximately 25 ft wide, and the
<br />bed consists primarily of cobble, sized material. Overbanks are mainly composed of
<br />coarse sand and small gravel,sized material. Grass and small brush grow on the
<br />overbanks and appear to have kept the overbank,bed material fairly stable during the
<br />flow of February 9, 1993, The site is in a section of the river that is considered
<br />intermittent. The nearly constant low flows are dominated by irrigation return flow.
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<br />Following the flow of February 9, 1993, the grass was in a prone position and the
<br />brush was bent in the direction of flow, The timing of the vegetation changes is not
<br />known, A thin layer of fine sand appears on the overbanks that probably was
<br />deposited following the peak. No significant amount of scour or fill was apparent in
<br />the reach during any of the flows recorded, For the three low,flow verifications,
<br />water mainly consisted of irrigation return flow and appeared to be clear [suspended
<br />sediment was 172,8 mg/L for a sample taken during a low, flow period (June 20,
<br />1995) and was considered as wash load], Suspended-sediment concentrations can
<br />exceed 35,000 mg/L for flows that result from runoff in upstream basins,
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<br />Table 1, Flow data and computed roughness coefficients, Hassayampa River near Arlington
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<br />Date of flow Discharge, in cubic feet per second Roughness coefficient Rating
<br />02-09-93 5,580 0,027 Estimate
<br />07-06-94 80.5 ,034 Good
<br />06-16-94 45,5 ,036 Good
<br />06-15-94 17,0 ,036 Good
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<br />Table 2, Average'reach properties, Hassayampa River near Arlington
<br /> Mean
<br /> Hydraulic velo- Total
<br /> Area, in Top width, in radius, in city, in feet Froude length, in Total Water.surface
<br />Date square feet feet feet per second number feet fall, in feet slope
<br />02-09-93 725 174 4,12 7,75 0,67 715 2,44 0,0034
<br />07-06-94 24,8 18.2 1.29 3,26 .49 571 2.22 ,0039
<br />06-16-94 175 17,3 ,97 2,61 .46 571 2,22 .0039
<br />06-15-94 9.29 15,7 ,58 1.86 .43 571 2.25 .0039
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<br />Hassayampa River near Arlington 11
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