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If the liquefaction point SZV is not situated landwards of the observation point Ssign, the criteria is met, which means that the check in step 3 must be performed so go to step 3.
Step 2: Criterion on slope protection met (<1:2,5)?
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This check should be performed only if the answer to question 1 is "No"criteria on harmfulness (step 1) is not met. However, as the result has no influence on the result assessment, this check is not performed.
Step 3: Artificially underwater installed and non-compacted sandy foreland?
The answer to this question nature of the submerged slope is given as input by the user , in the "General (Additional) Parameterparameters" window.
In case of non-natural deposited slopes, both Global and Detailed checks FAIL and it should immediately be switched to the advanced methods.
In case of natural deposited slopes, go to step 4.
Step 4: Flow slide possible based on geometry only (i.e. is the "optredingscriterium" met)?
If the previous step (step 3) has not been passed, a check on criteria of occurrence (“optredingscriterium”) must be performed.
The occurrence of a liquefaction flow slide is possible if one of the two following conditions is met:
- The average slope is steeper than or equal to 1:4, over a height of at least 5 m;
- The total slope (channel edge-channel bottom) is on average steeper than or equal to 1:7.
If the criteria of occurrence is met, the Global check FAILS and it should be switched to the Detailed method.
If the criteria of occurrence is not met, go to step 5.
Step 5: Is liquefaction possible?
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