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| Case | Step 1a | Step 1c | Step 1d | Step 1e Average slope | Step 1e Breach flow | Step 1e | Global check | Detailed check | Warning message(s) | Information message | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | No | Pass | Pass- | D50 < 200 μm (a) | |||||||
| B | Yes | Yes | Fail | Fail- | Artificial foreland (b) | ||||||
| C | Yes | No | Yes | Fail | Pass- | Steepest slope over 5 m (c) | |||||
| D | Yes | No | No | Yes | No | Yes | Fail | Pass- | |||
| E | Yes | No | No | Yes | Yes | Yes | Fail | Pass- | D50 < 200 μm (a) Very fine sand (d) | ||
| F | Yes | No | No | No | Yes | Yes | Fail | Fail- | D50 < 200 μm (a) Very fine sand (d) | ||
| G | Yes | No | No | No | No | No | PassPass | - | |||
| H | Yes | No | No | No | No | No | Pass | Fail | - | Illogical result (e) | |
| I | Yes | No | No | No | No | No | Pass | Not available | |||
| J | Yes | No | No | Yes | No | Yes | Fail | Not available |
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d The selected sand type is "Very fine" so the breach flow check in step 1e could not be performed, Advanced check needed.
e Global passes but Detailed fails, check the input.
For case A, the same input as benchmark 1-1 (see group 1) is used except:
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XSsign > XSzv => Flow slide would not lead to damage on levee => Global check passes.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction (= 0.00) < Allowable probability of failure (2.50 × 10-6) => Detailed check passes.D-Flow Slide results
Overall check: as Global and Detailed check pass, the The Overall check gives a Warning message because D50 < 200 μm , an Advanced check is therefore needed.
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Global check - Step 1c: The foreland is artificial => Global and Detailed check fail, an Advanced check is needed.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction < Allowable probability of failure => Detailed check passes.D-Flow Slide results
Overall check: as step 1c of The Overall check gives a Information message because the Global check fails, the Overall check fails whatever the Detailed check result.
Case C:
Global check - Step 1a:
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Global check - Step 1d: The average slope over a height of at least 5 m is 1:3.901 so steeper than 1:4 => Flow slide is possible based on criterium "steepest slope over 5 m" => Global check fails.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction > Allowable probability of failure => Detailed check fails.D-Flow Slide results
Overall check: the Overall result gives a warning Warning because the criteria on "steepest slope over 5 m" is met, an Advanced check is therefore needed.
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But the total slope is 1:6 so steeper than 1:7 => Flow slide is possible based on average slope => Global check fails.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction < Allowable probability of failure => Detailed check passes.D-Flow Slide results
Overall check: No messageOverall check: the Overall result passes.
Case E:
Global check - Step 1a:
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And the total slope is 1:5 so steeper than 1:7 => Flow slide is possible based on average slope => Global check fails.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction < Allowable probability of failure => Detailed check passes.D-Flow Slide results
Overall check: the Overall check gives a two Warning message messages because D50 < 200 μm and because the selected sand type is "Very fine", an Advanced check is therefore needed.
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=> Flow slide is possible based on average slope => Global check fails.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction < Allowable probability of failure => Detailed check passes.D-Flow Slide results
Overall check: as Detailed check passes, the Overall check gives a Warning message The Overall check gives two Warning messages because D50 < 200 μm and because the selected sand type is "Very fine", an Advanced check is therefore needed.
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=> Flow slide is not possible based on average slope => Global check passes.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction < Allowable probability of failure => Detailed check passes.D-Flow Slide results
Overall check: as Global and Detailed check pass, the Overall passes. No message.
Case H:
Global check - Step 1a: Flow slide would lead to damage on levee => Go to step 1c.
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=> Flow slide is not possible based on average slope => Global check passes.
Detailed check: ( see table below for intermediary results) Probability of flood damage by liquefaction > Allowable probability of failure => Detailed check fails.D-Flow Slide results
Overall check: Global passes and Detailed checks fails, that's not logical, so a warning message is displayed in the Overall check. No message.
Case I:
Global check : idem case H => Global check passes.
Detailed check: Results not available.
Overall check: the Global check passes and the Detailed check is not available. Therefore, the Overall check passes and no warning is given about illogical results.No message.
Case J:
Global check : idem case B => Global check fails.
Detailed check: Results not available.
Overall check: the Global check fails and the Detailed check is not available. Therefore, the Overall result is not available, a detailed check is needed No message.
D-Flow Slide results
D-FLOW SLIDE results are in accordance with the results by hand as show in the tables below.
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