RIPRAP SIZE
= LAYER# 5
DMAX, INCHES
=
21.
VELOCITY, FT =
7.90
VSS/VAVG
= 1.354
BEND RADIUS,FT =
500.
TOP WIDTH, FT
=
175.
R/W
=
2.861
VERT VEL CORR, Cv = 1.192
LOCAL DEPTH, FT=
10.60
DESIGN DEPTH
=
8.48
SAFETY FAC, Sf =
1.10
STABILITY COEF, Cs = 0.300
THICKNESS, IN =
21.00
THICKNESS COEF, Cv = 1.750
SIDE SLOPE =
2.00
SIDE SLOPE CORR, K1= 1.180
SP.GR. RIPRAP =
2.65
POROSITY, %
= 38.00
CHANNEL TYPE = TRAPEZOID
COST PER FOOT,$/FT =
0.00
TABLE 8-1. CROSS SECTION PROPERTIES
# STATION ELEV ROUGHNESS N-VALUE : GROUND : DELTA Y RIPRAP
FT
FT
HEIGHT EQUATION :SLOPE ANGLE : FT Dmax*[ ]
1
-100.0
15.00
1.230
STRICKLE
-2.00
-26.6
-15.00
1.0
2
-70.0
0.00
1.230
STRICKLE
0.00
0.0
0.00
1.0
3
70.0
0.00
1.230
STRICKLE
2.00
26.6
15.00
1.0
4
100.0
15.00
1
HYDRAULIC PROPERTIES WITH RIPRAP IN PLACE.
STRICKLER COEFFICIENT = 0.038
**** N
Q
WS TOP COMPOSITE SLOPE COMPOSITE VEL FROUDE SHEAR
ELEV WIDTH R
n-Value
NUMBER STRESS
CFS
FT FT
FT ft/ft
FPS
#/SF
**** 1 13500. 11.26 185.0 10.73 0.001700 0.0404 7.38 0.40 1.14
TABLE 8-4. HYDRAULIC PARAMETERS FOR SEDIMENT TRANSPORT
Q STRIP STRIP
---EFFECTIVE--- SLOPE n- EFF. Froude TAU
NO NO Q
WIDTH DEPTH
VALUE VEL. NO Prime
CFS
FT
FT FT/FT
FPS
#/SF
1 1 13500.
166.8 10.74 0.001700 0.0376 7.53 0.41 1.139
TABLE 8-5. EQUIVALENT HYDRAULIC PROPERTIES FOR OVERBANKS AND CHANNEL
DISTRIBUTED USING CONVEYANCE
N STRIP HYDRAULIC MANNING .........SUBSECTION...........
NO RADIUS n-VALUE DISCHARGE AREA VELOCITY
ft
cfs
sqft
fps
1
1
9.61
0.0376 13500.00 1830.33
7.38
...END OF JOB...
Riprap Size for a Given Discharge and Cross Section
Shape: Input and Output
Riprap size calculations are more complicated when the water discharge and
cross section are given than when the flow velocity and depth are given because
n-value becomes a function of riprap size. The computational procedure is
described in detail in Chapter 2. The stone size gradation table is the default for
riprap sizes, but quarry run stone can be prescribed, as noted above, although that
option is currently not available in SAMwin. Riprap size is determined
automatically when the RR-, RT-, and PF-records are included in a data set for
normal depth, bottom width, energy slope or water discharge calculations. The
105
Chapter 6
Input Requirements and Program Output for SAM.hyd
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