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For case G, the same input as benchmark 1-1 (see group 1) is used except for the state parameter which is equal to -0.06 instead of -0.03 and except for the diameters D50 and D15 which are equal to 250 μm and 150 μm resp. for sand layers.For the Detailed check, the required probability of failure is 1 per 40000 years instead of 1 per 4000 years and the migration velocity is 0.5m/year instead of 10 mm /year.
Benchmarks results
Hereafter are given the analytical results per case.
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| Benchmark | D-FLOW SLIDE | Relative error |
|---|---|---|---|
Marge | 35 | 35 | 0.00 % |
| Slope [1:xxx] | 15 | 15 | 0.00 % |
Assessment level | -10 | -10 | 0.00 % |
Step 1: Is liquefaction damaging on basis of geometry? | Yes | Yes | OK |
Step 3: Artificially underwater installed and non-compacted sandy foreshore? | No | No | OK |
| Step 4: Flow slide possible based on geometry only? | Yes | Yes | OK |
| Step 5: Is liquefaction possible based on state parameter? | No | No | OK |
| Step 6: Layers present with a thickness of minimal 5m, in which D50<200 μm or D15<100 μm ? | No | No | OK |
| Step 7: Is breaching possible? | Yes | Yes | OK |
Result of the Global check | Fail | Fail | OK |
| Fictive channel depth Hr [m] | 18.524 | 18.524 | 0.00 % |
| Fictive slope cotan αr | 10.5 | 10.5 | 0.00 % |
| Probability of preventing a liquefaction P(ZV) [/km/year] | 1.03 × 10-4 | 1.03 × 10-4 | 0.00 % |
| Reliability index β | 1.289 | 1.289 | 0.00 % |
| P(L > Lallowable) | 9.88 × 10-2 | 9.87 × 10-2 | 0.10 % |
| Probability of flood damage by liquefaction P(falen|ZV) [/year] | 1.02 × 10-5 | 1.02 × 10-5 | 0.00 % |
| Allowable probability of failure [/year] | 2.50 × 10-6 | 2.50 × 10-6 | 0.00 % |
Result of the Detailed check | Fail | Fail | OK |
| Overall result | Fail | Fail | OK |
Results of benchmark 3-1 for case G
| Benchmark | D-FLOW SLIDE | Relative error |
|---|---|---|---|
Marge | 35 | 35 | 0.00 % |
| Slope [1:xxx] | 15 | 15 | 0.00 % |
Assessment level | -10 | -10 | 0.00 % |
Step 1: Is liquefaction damaging on basis of geometry? | Yes | Yes | OK |
Step 3: Artificially underwater installed and non-compacted sandy foreshore? | No | No | OK |
| Step 4: Flow slide possible based on geometry only? | Yes | Yes | OK |
| Step 5: Is liquefaction possible based on state parameter? | No | No | OK |
| Step 6: Layers present with a thickness of minimal 5m, in which D50<200 μm or D15<100 μm ? | No | No | OK |
| Step 7: Is breaching possible? | No | No | OK |
Result of the Global check | Pass | Pass | OK |
| Fictive channel depth Hr [m] | 21.571 | 21.571 | 0.00 % |
| Fictive slope cotan αr | 10.5 | 10.5 | 0.00 % |
| Probability of preventing a liquefaction P(ZV) [/km/year] | 3.09 × 10-3 | 3.09 × 10-3 | 0.00 % |
| Reliability index β | 3.749 | 3.749 | 0.00 % |
| P(L > Lallowable) | 8.86 × 10-5 | 8.88 × 10-5 | 0.23 % |
| Probability of flood damage by liquefaction P(falen|ZV) [/year] | 2.74 × 10-7 | 2.75 × 10-7 | 0.36 % |
| Allowable probability of failure [/year] | 2.50 × 10-7 | 2.50 × 10-7 | 0.00 % |
Result of the Detailed check | Fail | Fail | OK |
| Overall result | Warning | Warning | OK |