from the riprap toe is input, then no bend radius should be prescribed. On the
other hand, if the average channel velocity upstream of the bend is input, then a
bend radius should also be prescribed. The bend radius, R, is defined as the
centerline radius of the bend, considering only the main channel. The water-
surface width, W, is defined as the main channel water-surface width at the
upstream end of the bend.
Figure 6.11. Input screen for riprap calculations for known velocity and depth.
Sample Input Data
The required input data for simple riprap calculations are shown in Figure
6.11. Again, if quarry run riprap gradations are to be specified, they must be
added to the data set with and editor, and should be entered one size per record,
starting with the smallest. This record is currently not available in SAMwin.
Various input data sets are given in the following examples.
T1 Test 6A
Simple Riprap design -- given velocity and depth
T1
Problem 1 Appendix H, EM 1110-2-1601
T1
EM 1110-2-1601 gradations
F#345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678 2345678
RS
7.1
15
2
200
RR 2.65
620
0
1.1
0.3
WT
60
$$END
103
Chapter 6
Input Requirements and Program Output for SAM.hyd
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