Author(s): M. Donner; E. Pasche; E. Nehlsen
Linked Author(s): Erik Pasche, Edgar Nehlsen
Keywords: No Keywords
Abstract: Strom surge barriers are operated to protect lowland against extreme storm surges and high tides. While hydrodynamic impacts of storm surge barriers have been well studied, less attention has been paid to its long-term morphological impacts on tidal marshwatercourses. Research studies and practical experiences already indicate siltation. Further evolution due to climate change will largely impact river morphology and operational strategies of the storm surge barriers. For identifying relevant processes a research study has been carried out, which focuses on morphological changes in tidal rivers controlled by storm surge barriers. A field study at the tidal river Kruckau has been performed, measuring SPM concentrations, sediment mixture and bathymetric evolution. These field data were analysed to identify, how suspended sediment and long-term morphology are affected by the operation of the storm surge barrier. A good understanding of the medium term bed evolution could be gained and leads to first suggestions for an optimized operation of storm surge barriers in tidal marsh-rivers.
Year: 2009