Abstract
Abstract The macrotidally influenced harbor of Dagebull on the North Sea coast of Germany features a piled south jetty, for which provided constructive designs are investigated regarding their pote...
Highlights
Hydro-morphodynamics drive deposition and erosion of sediments across scales and are a topic of continuous interest as they affect the operational cost of harbors and coastal infrastructure (Christiansen 1987; Verlaan and Spanhoff 2000)
Port, Coastal, Ocean Eng., 2021, 147(6): 05021013 (b) situations require more detailed planning of constructional changes; this is important in regions where environmental restrictions apply as is the case for the harbor of Dagebüll, the harbor for which this study presents a work flow of tasks to arrive at reliable decisions when required to assess the impact of refurbishments on local hydro-morphodynamics
Based on the input data and parametrization presented in section “Methods,” the tidal basin model as well as the detailed nested harbor model are used to project potential impacts on hydrodynamics and morphodynamics, arising from layout changes
Summary
Hydro-morphodynamics drive deposition and erosion of sediments across scales and are a topic of continuous interest as they affect the operational cost of harbors and coastal infrastructure (Christiansen 1987; Verlaan and Spanhoff 2000). Treatment, or disposal costs are often high and continue to grow, as regulations are becoming more strict (Frittelli 2019) This leads to sediments being classified as contaminated and this complicates maintenance works, a serious problem for small harbors, e.g., those located along the German North Sea coast (BfG 2000) with associated dredging costs of up to €36/m3 (City of Hamburg 2016). Krone (1987) introduced the concept of keep the sediments in the system (KSIS), rather than removing them, in order to prevent unnatural concentration gradients which, in turn, could accelerate siltation processes This concept has been developed further by PIANC (2008) and is summarized by Headland et al (2007) proposing three main strategies to minimize harbor siltation (MHS): (1) keep sediment out, (2) keep the sediment moving, and (3) keep sediment navigable.
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