INTEGRATED APPROACH ON THE SAFETY OF DIKES ALONG THE GREAT DUTCH LAKES

Jentsje W. van der Meer, Harry de Looff, Peter C.G. Glas

Abstract


Two great lakes of approximately 1000 km2 exist in the Netherlands surrounded by low lying land. Under extreme events storm surges of 2-3 m can be expected with significant wave heights up to 3 m. The question to answer was to what extent, under extreme conditions, the situations around the two lakes are comparable with situations along the sea coast. And whether or not the dikes along these lakes should give similar safety against flooding. An integrated approach was followed based on risk analysis. The study contained the following parts: hydraulic boundary conditions, probabilistic calculations on required dike heights, cost estimates on possible dike improvements, damage due to flooding and risk analysis on inundation. The main conclusion is that the two lakes have a similar behaviour with respect to risk of flooding which is also comparable with estuaries and other areas along the sea coast.

Keywords


Great Dutch Lakes; dikes; safety

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