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Item type:Publication, Access status: with files , Effects of sea level rise and tidal flat growth on tidal dynamics and geometry of the Elbe estuary(Copernicus Publications, 2024-03-18); ; ; Future global mean sea level rise (SLR) will affect coastlines and estuaries in the North Sea and therefore also coastal protection structures, unique local ecosystems and important waterways. SLR will not only raise water levels but also influence tidal dynamics and morphodynamics, which is why the tidal flats of the Wadden Sea can grow to a certain extent with SLR. Investigations on the effects of climate-change-induced SLR and the related potential bathymetric changes inside of estuaries form an important basis for identifying vulnerabilities and developing appropriate adaptation strategies. To analyse the influence of potential SLR and tidal flat elevation scenarios on the tidal dynamics in the Elbe estuary, we used a highly resolved hydrodynamic numerical model of the German Bight. The analysis results show increasing tidal range in the Elbe estuary solely due to SLR. They also reveal strongly varying changes with different tidal flat growth scenarios: while tidal flat elevation up to the mouth of the estuary can cause tidal range to decrease relative to SLR alone, tidal flat elevation in the entire estuary can lead to an increase in tidal range relative to SLR alone. Further analyses show how the geometric parameters of the Elbe estuary are changing due to SLR and tidal flat elevation. We discuss how these changes in estuarine geometry can provide an explanation for the changes in tidal range.Publicationtype: Journal Article16 73 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Field measurements and lab investigations to determine soil exchange characteristics for sediments from the Weser estuary(2021-09-13); ; ; Sedimentation of fine grained sediments is a natural physical phenomenon influenced by bio-geochemical processes which occurs in rivers, channels and estuaries. The deepening of waterways in estuaries to enhance the navigability intensifies this effect. Even in the centre of the channel, where high flow velocities favour sediment transport and erosion, net sedimentation and accumulation occurs. Maintenance dredging is the main method to maintain the navigational channel which requires large financial investments and has potential negative impacts on the environment as well. The research project FAUST (For an improved understanding of estuarine sediment transport) addresses the challenge of net sedimentation and accumulation by investigating the transport properties of sediments in field (primarily in the Weser estuary) and in laboratory studies to advance the development of large scale 3D morphodynamic-numerical models. The conceptual design of the project FAUST has been presented in Patzke et al. (2019). Here we focus on erodibility experiments using a gust erosion microcosm system.Publicationtype: Conference Poster76 44