INTRODUCTION GENERAL SUMMARY OF EXPERIMENTS THE HARTEL CANAL PROTOTYPE EXPERIMENTS INTRODUCTION SITUATION INSTALLED INSTRUMENTS HYDRAULIC LOADS BEHAVIOUR OF TEST EMBANKMENTS Loose materials Plaeed (free) bloeks Flexible interloeked bloek revetments Sand-sausage mattresses (Profix) PVC Reno mattresses (Maeeaferri Gabions) Fixtone (Bitumarin B.V.) STABILITY CALCULATIONS CONCLUSIONS EMBANKMENTS IJSSELMEER (HOUTRIB-DIKE) INTRODUCTION SITUATION DESIGN ASPECTS DESCRIPTION OF THE TEST RESULTS THE STORM OF OCTOBER 20TH, 1986 DISCUSSION ON FAILURE MECHANISMS CONCLUSIONS