A PROBABILISTIC MODEL FOR THE DETERMINATION OF HYDRAULIC BOUNDARY CONDITIONS IN A DYNAMIC COASTAL SYSTEM

• DOI: 10.9753/icce.v32.waves.38
• Publication Date: 2012-10-03T22:30:13Z
• Authors: Jacco Groeneweg; Joost Beckers; Caroline Gautier
• Keywords: Wave height; Significant wave height; Wind wave model

In 2011 new Hydraulic Boundary Conditions must be established for the statutory assessment of flood protection in Wadden Sea area, which is a complex tidal system northern part Netherlands. The aim to base these normative wave conditions on simulation model SWAN and probabilistic method Hydra-K, consistent with other systems as Holland Coast Zeeland Delta. Assumptions made latter water systems, like steady state wind forcing, uniform levels neglect currents, are not valid basin Sea. A schematic temporal variation both direction speed applied define fields that drive hydrodynamic computations. Both resulting level current form input computations large number combinations basic direction, offshore surge phase difference between tide maximum speed. result database results used look-up table Hydra-K transform statistics load primary sea defenses. general more advanced leads heights up 10% lower periods 10-20% smaller than those obtained presently These differences can ascribed inclusion currents positive shoreward tilt level. relevant physics increases accuracy HBC. Therefore, will determine HBC 2011.