Bottomless Culvert Scour Study: Phase II Laboratory Report
Appendix B: Outlet Scour Results
Table 8. Outlet scour results summary.
| Date |
Figure |
Flow Depth
[cm] |
Velocity
[cm/s] |
Sub-
merged |
Inlet
Wingwall |
Outlet
Wingwall |
Note |
Width of
Scour Hole
(W) [mm] |
Depth of
Scour Hole
(ys) [mm] |
Distance to
Scour Hole
(L) [mm] |
| 2/11/2003 |
62 |
23 |
14 |
Yes |
45 degree |
None |
Bottomless culvert study |
446 |
115 |
615 |
| 2/25/2003 |
63 |
10 |
14 |
No |
45 degree |
None |
Bottomless culvert study |
278 |
107 |
659 |
| 3/25/2003 |
64 |
12 |
15 |
No |
45 degree |
Circular bevel |
Bottomless culvert study |
388 |
116 |
618 |
| 4/7/2003 |
65 |
13 |
16 |
No |
45 degree |
Elongated, streamlined bevel |
Bottomless culvert study |
157 |
59 |
875 |
| 4/29/2003 |
66 |
12 |
15 |
No |
45 degree |
Short streamlined bevel |
Bottomless culvert study |
330 |
63 |
874 |
| 7/22/2003 |
67 |
12 |
15 |
No |
45 degree |
45 degree |
Bottomless culvert study |
393 |
116 |
846 |
| 8/6/2003 |
68 |
12 |
15 |
No |
45 degree |
8 degree (rough) |
Bottomless culvert study |
323 |
91 |
516 |
| 10/7/2003 |
69 |
12 |
15 |
No |
45 degree |
8 degree (smooth) |
Bottomless culvert study |
249 |
64 |
676 |
| 12/9/2003 |
70 |
12 |
15 |
No |
8 degree (smooth) |
8 degree (smooth) |
Bottomless culvert study |
212 |
97 |
470 |
| 12/16/2003 |
71 |
23 |
14 |
Yes |
8 degree (smooth) |
8 degree (smooth) |
Bottomless culvert study |
258 |
106 |
648 |
| 10/27/2004 |
72 |
23 |
13 |
Yes |
45 degree |
45 degree |
HGL (hydraulic grade line) for bottomless culverts |
556 |
110 |
803 |
| 11/10/2004 |
73 |
23 |
13 |
Yes |
45 degree |
45 degree |
HGL for bottomless culverts, Chang's pile dissipator at outlet |
403 |
84 |
663 |
| 3/19/2004 |
74 |
23 |
13 |
Yes |
45 degree |
45 degree |
MDSHA Standard Plan, Riprap = 1" |
441 |
122 |
1,070 |
|
|
