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原文传递 Projecting Hydro-Morphodynamic Impacts of Planned Layout Changes for a Coastal Harbor

题名：	Projecting Hydro-Morphodynamic Impacts of Planned Layout Changes for a Coastal Harbor
正文语种：	eng
作者：	Oliver Lojek;Nils Goseberg;Torsten Schlurmann
作者单位：	Leichtweiss-Institute for Hydraulic Engineering and Water Resources Devision of Hydromechanics Coastal and Offshore Engineering Technische Universitat Braunschweig Beethoven StraBe 51a 38106 Brunswick Ger-many;Leichtweiss-Institute for Hydraulic Engineering and Water Resources De-vision of Hydromechanics Coastal and Offshore Engineering Technical Univ. Carolo Wilhelmina of Brunswick Beethoven StraBe 51a 38106 Brunswick Germany Coastal Research Center Joint Central Institution of the Leibniz Universitaet Hannover and the Technische Universitaet Braunschweig Merkurstrasse 14 30419 Hannover Germany;Ludwig-Franzius Institute for Hydraulic Estuarine and Coastal Engineering Nienburger Str. 4 30165 Hannover Germany Coastal Research Center Joint Central Institution of the Leibniz Universitat and the Technische Universitaet Braunschweig Merkurstrasse 14 30419 Hannover Germany
摘要：	The macrotidally influenced harbor of Dagebiill on the North Sea coast of Germany features a piled south jetty, for which provided constructive designs are investigated regarding their potential hydro-morphological impacts on the harbor area and adjacent navigational channel. The harbor experiences a steady accumulation of sediment. This results in a reduction of navigational depth and necessitates regular maintenance dredging constituting a cost aspect. A comprehensive field study was conducted, deploying a ridged inflatable boat (RIB) equipped with differential Global Positioning System, a winch for conductivity, temperature, and depth casting as well as sediment and water sampling and an acoustic Doppler current profiler for current profiling. Measurements reveal a tidally governed alternating flow pattern inducing a vortex current inside the harbor basin. Hydrodynamic sea floor grain sorting is detected through sediment sampling. A numerical model cascade is developed and calibrated against available tide gauge and sediment inventory data as well as multibeam survey data and acquired field measurements. The calibrated model cascade is used to simulate layout variants and compare resulting impacts to identify preferable jetty designs.
出版年：	2021
期刊名称：	Journal of Waterway, Port, Coastal and Ocean Engineering
卷：	147
期：	6