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This check should be performed only if the damage criterion (step 1a) is not met (i.e. a flow slide does not lead to damage). The result of this check will not lead to failure of not result in a "failure" in the safety assessment, but is an indication that maintenance work is requiredbut only indicates that the slope protection may become unstable.
Step 1c: Artificially underwater installed and non-compacted sandy foreland ?
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NOTE: Only the case "without flat blankshorizontal steps" is implemented in D-Flow Slide.
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Table A.4.2a from CUR113b, profile without flat bermshorizontal steps:
from depth | to depth z [m +GL(a)] | Average slope | |||
|---|---|---|---|---|---|
Medium fine sand D50 > 200 μm and D15 > 100 μm | Coarse sand/Gravel D50 > 500 μm and D15 > 250 μm | ||||
| Local slope | Average slope 0 - z | Local slope | Average slope 0 - z | ||
0 | -5 | 1:2 | 1:2 | 1:2 | 1:2 |
-5 | -10 | 1:3 | 1:2.5 | ||
-10 | -15 | 1:4 | 1:3 | 1:3 | 1:2.5 |
-15 | -20 | 1:5 | 1:3.5 | ||
| -20 | -25 | 1:6 | 1:4 | 1:4 | 1:3 |
| -25 | -30 | 1:8 | 1:4.67 | ||
| -30 | -35 | 1:10 | 1:5.43 | 1:6 | 1:3.75 |
| -35 | -40 | 1:10 | 1:6 | ||
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