IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Flood risk management and adaptation : Hydrodynamic system study of the elbe estuary as a basis for the evaluation of adataption measures f...
Hydrodynamic system study of the elbe estuary as a basis for the evaluation of adataption measures for the climate change impacts mitigation
Here, saltwater meets freshwater from the upstream and caused a density current. The tidal energy, expressed in tidal amplitude as well as in the flood and ebb velocities will be mitigated due to friction. Further, tributaries and anabranches as well as the meandering are typical for estuaries and has an additional natural effect for the mitigation of the tidal energy. Due to settlement in coastal regions as well as in estuaries, these areas have always changed and are affected to anthropogenic interventions like land reclamation, embankments or deepening of the fairway. All these and further
anthropogenic interventions has entailed a loss of shallow water areas and natural flood plains and have impacts on the hydrodynamics and the morphodynamics of the entire estuary system. For this, the Elbe estuary is a classic example.
Since the 12th century, on both banks of the Elbe Estuary exist a continuous dike line. The dike line has been completely redesigned and renewed after the impacts of several floods in 1962 and 1976. The weir in Geesthacht is now the upper boundary of the incoming tidal wave and reflects the tidal wave. Only in cases of storm surges or high upstream flow, the weir will be placed. Provably, anthropogenic interventions have an influence and effect on the hydrodynamics and morphodynamics of the Elbe estuary. For example, the tidal range increased from about 2 meter in Cuxhaven to about 3.6 meter to Hamburg, St. Pauli (Fickert et al., 2007).
File Size : 2,245,703 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Flood risk management and adaptation
Date Published : 01/10/2015
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