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Last modified
11/23/2009 10:51:26 AM
Creation date
10/4/2006 9:39:40 PM
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Template:
Floodplain Documents
County
Statewide
Title
Rock Riprap Design for Protection of Stream Channels near Highway Structures volume 2
Date
1/1/1986
Prepared By
USGS
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />LIST OF SYMBOLS (continued) <br /> <br />Symbol <br /> <br />to <br /> <br />Term <br /> <br />Internal angle of channel bend, in degrees <br /> <br /> <br />Internal angle which differentiates between a long and short bend <br /> <br /> <br />Magnitude of superelevation <br /> <br /> <br />Stability factor for particle on plane horizontal bed <br /> <br />Angle of repose of riprap; angle of bed slope; side slope angle <br /> <br /> <br />Angle between horizontal and velocity vector at a point <br /> <br /> <br />Converts safety factor from nonhorizontal to horizontal side-slope <br /> <br />flow <br /> <br />700 constant for broken rock <br /> <br /> <br />Actual or design shear on channel bed <br /> <br />Shear at bend <br /> <br />Critical shear stress <br /> <br />toc <br /> <br />toy <br /> <br />11 <br />e <br /> <br />^ <br /> <br />t <br /> <br />p <br /> <br />t <br /> <br />tb <br />t <br />c <br /> <br />t <br />o <br /> <br />Mean boundary shear acting over wetted perimeter; critical <br />shear stress <br /> <br />t <br />s <br /><I> <br /> <br />ljl <br /> <br />Average tractive force on side slope in vicinity of particle <br /> <br /> <br />Angle of side slope to horizontal; angle of repose of riprap <br /> <br />Angle of side slope <br /> <br />CONVERSION FACTORS <br /> <br />For readers who prefer metric units rather than inch-pound units, the <br />conversion factors for the terms used in this report are listed below: <br /> <br />Multiply <br /> <br />ft (feet) <br />ft (feet) <br />ft/s (feet per second) <br />ft/sz (feet per square second) <br />ftZ (square feet) <br />ft3/s (cubic feet per second) <br />inches <br />Ib (polind) - <br />Ib/ftZ (pounds per square foot) <br />Ib/ft3 (pounds per cubic foot) <br />mi (miles) <br />ton <br /> <br />~ <br /> <br />0.3048 <br />304.8 <br />0.3048 <br />0.3048 <br />0.0929 <br />0,0283 <br />25,4 <br />0.454 <br />4.882 <br />16,02 <br />1,609 <br />0,907 <br /> <br />VI II <br /> <br />To obtain <br /> <br />m (meters) <br />mm (millimeters) <br />m/s (meters per second) <br />m/sz (meters per square second) <br />mZ (square meters) <br />m3/s (cubic meters per second) <br />mm (millimeters) <br />kg (kilogram) <br />kg/m2 (kilograms per square meter) <br />kg/m3 (kilograms per cubic meter) <br />km (kilometers) <br />megagram <br />
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