TI
TEST NO. 4 CALCULATE ENERGY SLOPE
TI
1
2
3
4
5
6
7
8
9
10
F# 345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678
CT
100
10
3
3
2
.02
2
.2
2
.2
QW
4050
WS
3.07
WT
55
$$END
Sample Output Data
The general output tables from these calculations are described earlier.
However, note that table series "8-x" has become "6-x". The information
contained in the two series of tables is the same, with the title of the "x-1" table
flagging both the calculation performed and the compositing method used. Also
note that the calculated slope is shown in Table 6-1 as "Slope" and is not flagged
as having been calculated.
TABLE
6-1.
CALCULATE ENERGY SLOPE;
COMPOSITE PROPERTIES BY ALPHA METHOD.
**** N
Q
WS
TOP
R
SLOPE
n
VEL
FROUDE
SHEAR
ELEV
WIDTH
Value
NUMBER
STRESS
CFS
FT
FT
FT
ft/ft
FPS
#/SF
**** 1
4050.
3.07
118.4
3.01 0.005203 0.0185
12.08
1.23
0.98
TABLE 6-4. 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
4050.
110.8
2.99 0.005203 0.0177 12.24
1.25
0.969
Hydraulic Roughness Calculations: Input and Output
In this calculation roughness becomes the dependant variable in the Manning
equation, thus calculating that variable:
W = f(Q, n, D, z, S)
Geometry, compositing and plotting are handled as described for normal
depth calculations. This calculation, like the other solutions of the Manning
equation which involve compositing, is trial and error. A simple solution of the
Manning equation is used to calculate the first trial roughness coefficient. Of the
several equations for hydraulic roughness, the Strickler (Manning) equation is the
most likely to converge. The Brownlie equation may have trouble converging
due to the discontinuity associated with the transition zone.
97
Chapter 6
Input Requirements and Program Output for SAM.hyd
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