scholarly journals MORPHOLOGICAL REACTIONS OF TIDAL SYSTEMS DUE TO NEARSHORE CONSTRUCTION WORKS

1982 ◽  
Vol 1 (18) ◽  
pp. 150 ◽  
Author(s):  
R. Dieckmann ◽  
H.W. Partenscky ◽  
H. Schwarze
Keyword(s):  
Coastal Area ◽  
Storm Surges ◽  
Tidal Flats ◽  
Coastal Protection ◽  
Large Area ◽  
The Past ◽  
The North ◽  
Sea Coast ◽  
North Sea Coast ◽  
Construction Works

The nearshore region of the North German North Sea coast is characterised by a large area of tidal flats with a width of 10 to 30 km (Fig. 1) . The development of the structure of this coastal area in the past centuries was mainly determined by several severe storm surges, which have destroyed the formerly existing coastline. In its present state the coastal area is subdived into numerous tidal flats, islands and peninsulas of different size and more or less deep channels and small gullies. Due to its historical development, this area cannot be expected to be morphologically stable. Once people learnt to build safe dikes, the coastline existing at the time was fixed whilst the islands in the shore belt were protected against flooding during storm surges. However, the shore belt is furthermore exposed to waves and tidal currents which cause - apart from certain shlftings of gullies - extensive permanent erosion and sedimentation in parts of the shore belt with an increasing tendency in the last decades. The nearshore region at some places on the coast is extremely endangered in its function as part of the coastal protection system, consisting of the dike, the foreshore above MHW and the tidal flat area. First attempts to achieve morphological stabilisation of the nearshore region consisted in the construction of dams normal to the coastline. However, the shore belt still remained morphologically unstable and could not yet be transformed into a stable system.

scholarly journals SECULAR CHANGE IN TIDAL FLAT HEIGHTS

1988 ◽  
Vol 1 (21) ◽  
pp. 132
Author(s):  
Winfried Siefert
Keyword(s):  
Morphological Analysis ◽  
Tidal Flats ◽  
Coastal Engineering ◽  
Secular Change ◽  
Coastal Protection ◽  
Mean Sea Level ◽  
The Mean ◽  
High Level ◽  
Sea Coast ◽  
North Sea Coast

The German North Sea Coast is relatively short (370 km); its shape is extremely irregular with estuaries, extended tidal flats, partly protected by sandy islands with deep tidal gullies between them (Fig. 1). In order to gain more detailed information and sufficient knowledge about the variety and variations in this region, the German Coastal Engineering Board (KFKI, Kuratorium fur Forschung im Kusteningenieurwesen) has initiated a high-level and extensive programme, "MORAN", "Morphological Analysis Klorth-Sea-Coast". The purpose and the first ideas of the programme were presented by Siefert and Barthel (1981). Investigations are still under way. It is of high interest whether the mean height of the tidal flats will rise, if the green house effect results in an acceleration of the mean sea level rise. In that case coastal protection in areas behind tidal flats will have to be changed completely, as then wave energy will no longer be dissipated in front of the coastline and will attack the dikes heavily .

What can idealized storm surge simulations tell us about worst case scenarios?

2021 ◽  
Author(s):  
Elin Andrée ◽  
Jian Su ◽  
Martin Drews ◽  
Morten Andreas Dahl Larsen ◽  
Asger Bendix Hansen ◽  
...  
Keyword(s):  
Wind Speed ◽  
Sea Level ◽  
North Sea ◽  
Wind Direction ◽  
Water Levels ◽  
Sea Levels ◽  
The North ◽  
The North Sea ◽  
Sea Coast ◽  
North Sea Coast

<p>The potential impacts of extreme sea level events are becoming more apparent to the public and policy makers alike. As the magnitude of these events are expected to increase due to climate change, and increased coastal urbanization results in ever increasing stakes in the coastal zones, the need for risk assessments is growing too.</p><p>The physical conditions that generate extreme sea levels are highly dependent on site specific conditions, such as bathymetry, tidal regime, wind fetch and the shape of the coastline. For a low-lying country like Denmark, which consists of a peninsula and islands that partition off the semi-enclosed Baltic Sea from the North Sea, a better understanding of how the local sea level responds to wind forcing is urgently called for.</p><p>We here present a map for Denmark that shows the most efficient wind directions for generating extreme sea levels, for a total of 70 locations distributed all over the country’s coastlines. The maps are produced by conducting simulations with a high resolution, 3D-ocean model, which is used for operational storm surge modelling at the Danish Meteorological Institute. We force the model with idealized wind fields that maintain a fixed wind speed and wind direction over the entire model domain. Simulations are conducted for one wind speed and one wind direction at a time, generating ensembles of a set of wind directions for a fixed wind speed, as well as a set of wind speeds for a fixed wind direction, respectively.</p><p>For each wind direction, we find that the maximum water level at a given location increases linearly with the wind speed, and the slope values show clear spatial patterns, for example distinguishing the Danish southern North Sea coast from the central or northern North Sea Coast. The slope values are highest along the southwestern North Sea coast, where the passage of North Atlantic low pressure systems over the shallow North Sea, as well as the large tidal range, result in a much larger range of variability than in the more sheltered Inner Danish Waters. However, in our simulations the large fetch of the Baltic Sea, in combination with the funneling effect of the Danish Straits, result in almost as high water levels as along the North Sea coast.</p><p>Although the wind forcing is completely synthetic with no spatial and temporal structure of a real storm, this idealized approach allows us to systematically investigate the sea level response at the boundaries of what is physically plausible. We evaluate the results from these simulations by comparison to peak water levels from a 58 year long, high resolution ocean hindcast, with promising agreement.</p>

List of Publications Recording the Results of Researches carried out under the Auspices of the Marine Biological Association of the United Kingdom in their Laboratory at Plymouth or on the North Sea Coast from 1886–1900

1900 ◽  
Vol 6 (1) ◽  
pp. 115-135
Keyword(s):  
United Kingdom ◽  
North Sea ◽  
Biological Association ◽  
The North ◽  
Marine Biological Association ◽  
The United Kingdom ◽  
The North Sea ◽  
Different Parts ◽  
Sea Coast ◽  
North Sea Coast

The following list has been classified, so far as practicable, according to subjects, in order that it may be useful for purposes of reference. The list does not include publications recording the results of observations made on material supplied by the Association to workers in different parts of the country, of which a considerable amount is sent out each year.

List of Publications Recording the Results of Researches carried out under the Auspices of the Marine Biological Association of the United Kingdom in their Laboratory at Plymouth or on the North Sea Coast from 1886–1907

1908 ◽  
Vol 8 (2) ◽  
pp. 241-264
Keyword(s):  
United Kingdom ◽  
North Sea ◽  
Biological Association ◽  
The North ◽  
Marine Biological Association ◽  
The United Kingdom ◽  
The North Sea ◽  
Different Parts ◽  
Sea Coast ◽  
North Sea Coast

The following list has been classified, so far as practicable, according to subjects, in order that it may be useful for purposes of reference. The list does not include publications recording the results of observations made on material supplied by the Association to workers in different parts of the country, of which a considerable amount is sent out each. year.

scholarly journals Dual-Frequency Airborne SAR for Large Scale Mapping of Tidal Flats

2020 ◽  
Vol 12 (11) ◽  
pp. 1827 ◽  
Author(s):  
Muriel Pinheiro ◽  
Joel Amao-Oliva ◽  
Rolf Scheiber ◽  
Marc Jaeger ◽  
Ralf Horn ◽  
...  
Keyword(s):  
Large Scale ◽  
Tidal Flats ◽  
Dual Frequency ◽  
Digital Elevation ◽  
First Results ◽  
Data Source ◽  
Airborne Sar ◽  
Flooded Areas ◽  
Sea Coast ◽  
North Sea Coast

Digital elevation models of tidal flats are a most valuable data source for the water management of coastal areas and need frequent updates to account for changes in sedimentation, erosion and identification of damages in building infrastructure. This paper presents the conceptual design, the processing methodology and first results of an airborne SAR campaign conducted in July 2019 at the German North Sea coast, showing the potential for accurate monitoring of height changes at decimeter level in mudflat areas, as well as indication of vegetation cover and water flooded areas.

Methanogenesis in saltmarsh soils of the North Sea coast of Germany

1996 ◽  
Vol 47 (2) ◽  
pp. 175-182 ◽  
Author(s):  
L. GIANI ◽  
K. DITTRICH ◽  
A. MARTSFELD-HARTMANN ◽  
G. PETERS
Keyword(s):  
North Sea ◽  
The North ◽  
The North Sea ◽  
Sea Coast ◽  
North Sea Coast
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