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As the details of the calculation performed by hand are not available, those benchmarks are set in group 2.
2.1. Spui dike at km 63.9 (Nieuw Beijerland)
Description
The dike profile at hmp 63.9 is given in the figure below.
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Method | Benchmark | D-FLOW SLIDE | Relative error |
|---|---|---|---|
Global check | FailedFailFailed | Fail | OK |
Detailed check | FailedFailFailed | Fail | OK |
2.2. Spui dike at km 65.0 (between Oud Beijerland and Nieuw Beijerland)
Description
The dike profile at km 65.0 is given in the figure below.
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Method | Benchmark | D-FLOW SLIDE | Relative error |
|---|---|---|---|
Global check | PassedPass | FailedFail | not OK |
Detailed check | PassedPass | FailedFail | not OK |
2.3. Spui dike at km 67.8 (oud Beijerland)
Description
The dike profile at km 67.8 is given in the figure below.
The soil profile and the material properties are given in the following table:
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- A state parameter (for Global step 5 and Detailed checks) of -0.05
- A critical retrogression length of 42.098 m (which corresponds to the foreland length = 97.460 m - 55.362 m)
- a migration velocity foreshore of 100 mm/year
- For the state parameter per layer, a value of -0.04 is used for sand layers and -0.06 for the other layers.
D-FLOW SLIDE results differ from are in accordance with the results by hand for the Detailed check, as show in the table below. According to D-FLOW SLIDE, the Detailed check fails even if P(ZV) < P(ZV)allowable .
Method | Benchmark | D-FLOW SLIDE | Relative error |
|---|---|---|---|
Global check | FailedFailFailed | Fail | OK |
Detailed check | PassedPassPassed | Fail | Not OK |