HALF-LIFE PERIOD OF SEDIMENTATION - MODEL TEST ON A SCALE 1:1

Helmut Manzenrieder

Abstract


In the framework of an extension plan for a large cargo handling berth, it is necessary for one alternative to build an artificial approach. The bottom of this dredged channel will lie approx. 6 m under the natural seabed level. The run of the axis is unfavourable since it is perpendicular to strong tidal currents which reach 2 m/s in the 705 cycles per year. In a model test, re-sedimentation for a volume of approx. 210,000 m3 was observed indirectly in the standard procedure with repeated measurements by echo sounding as well as with a direct method using a sandsurface- meter combined with wind, tide, current and wave measurements.

Keywords


model test; 1:1 scale; half-life period; sedimentation

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