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The global check as implemented in D-Flow Slide is based on the assessment schema described in VTV-2014 and may comprise the following steps
NOTE: If the average state parameter Ψ5m (as entered in the General Parameters window) is more than -0,05, that means that liquefaction is possible.
In such case the Global check fails, whatever the result of the steps described below.
An information message will be given in the Overall Results window.
Step 1 : Would flow slide lead to damage on levee (i.e. is the "schadelijksheidscriterium" met)?
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If the criteria of occurrence is not met, go to step 5.
Step 5: Is liquefaction possible?
Liquefaction is possible if the state parameter Ψ5m > -0.05 .
If Ψ5m < -0,05 that means that liquefaction is unlikely.
Ψ5m is defined as the lowest average value of state parameter over total of 5 m between the water line and 0.5H below the toe of the submerged slope.
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Step 6: Are there layers present with a thickness of minimal 5 m, in which D50 < 200 μm or D15 < 100 μm averaged over a thickness of 5 m?
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