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KFKI Aktuell KRING 2013 in Germany meetings are usually organised by the KFKI (since its founding in 1972) in cooperation with the coastal protection authority of the federal state in question. The number of German participants at the KRING meetings held in Germany in the past ranged between 25 and 50 persons, otherwise between 10 and 30 persons up to 2006. Unfortunately, the number of German participants has diminished in recent years. This has mainly been due to ever-decreasing funds and an increasing work load. In times of climate One of the most well-known Associations concerned change, decreasing public financial resources and with coastal engineering, namely the Dutch “Kring increasingly complex planning processes (EU directi- van Zeewerende Ingenieurs” (KRING), will stage its ves), however, it would appear that the cross-border annual meeting on the west coast of Schleswig- exchange of ideas and experiences is more important Holstein from 22 to 24 September 2013. than ever before. Traditionally, German coastal engineers are also For this reason, every attempt should be made to warmly invited to participate in this meeting. reverse this trend this year at the 13th (!) annual KRING was founded by Dutch coastal engineers in meeting in Germany. This year's meeting on the west 1954 in response to the devastating storm surge of coast of Schleswig-Holstein will commence on Sunday 1953. It serves as a platform for exchanging ideas, evening on 22 September in Husum with a welcoming knowledge and practical experience in the field of address and opening lectures. Bus and ship excur- coastal engineering and also deals with management sions to the wadden sea hallig islands as well as to issues and engineering problems. KRING is not an interesting engineering structures and institutions are Association in the formal sense; it neither has Articles planned in the morning on Monday and Tuesday. The of Association nor members. Continuity is guaranteed excursion days will be rounded off by scientific by a Dutch Chairman with a secretariat. The present presentations. The official programme will end at chairman is Adrie Provoost from “Waterschap lunchtime on Tuesday. There will, of course, also be Scheldestromen”. plenty of time on this occasion for scientific discus- Since 1954 the three-day KRING meeting has been sions and informal conversations, e.g. at the traditio- staged annually in rotation in the Netherlands, nal event dinner on Monday evening. Invitations to Germany, Belgium, Denmark, Poland and the United the meeting as well as a detailed programme and Kingdom. The programme includes site visits combi- registration information will be widely distributed in ned with lectures on local and more general topics. April. In case you have not received an invitation by The participants are mainly comprised of staff mid-May, you can either contact the KFKI secretariat members of public authorities responsible for coastal or visit the KFKI website. engineering matters in the above-mentioned states. About one half of the approx. 80 to 100 participants are from the Netherlands. Jacobus Hofstede | Ministry of Energy transition, KRING has already been staged in Germany 12 times. Agriculture, Environment and Rural Areas Schleswig- The first meeting was in Lower Saxony in 1962 Holstein following the so-called Hamburg flood disaster while Mercatorstraße 3 | 24062 Kiel the last was in Hamburg in 2005. The German KRING [email protected] KFKI aktuell............................................................ 12th year Edition | 02/2012 | Hamburg, December 2012 shore zone, consistent integrated depth distributions AufMod (03KIS082-03KIS088) with corresponding degrees of fuzziness were genera- ted in yearly time slices from spatial and temporal Development of integrated model systems for interpolations over the period 1982 - 2012. Based on analysing long-term morphodynamics in the the wide-area bathymetric time series obtained in this German Bight way, it is possible using the functional bed model to Jennifer Valerius derive additional morphological parameters, such as German Federal Maritime and Hydrographic Agency e.g. the morphological space (see Figure 1), and Dr. rer.-nat. Frank Kösters compare these with the results of the numerical German Federal Waterways Engineering and simulation models. Implementation of the numerical Research Institute methods permits a process-orientated interpretation As part of the North Sea, the German Bight is one of of morphological changes, e.g. in terms of tide vs. the world's most intensively used marginal seas in wind and changes due to wave action. economic terms. The large-scale sediment dynamics In order to describe sedimentology, grain distribution and associated bed shaping processes in the German data were gathered for the entire North Sea. These Bight influence a variety of utilisation requirements were then evaluated in the functional bed model ranging from maritime shipping to the erection of throughout the German Bight with regard to standard structures and the realisation of coastal protection sedimentological parameters such as median values measures. It is thus highly important to improve our (see Figure 2) and sorting. Idealised model investiga- knowledge of the complex processes responsible for tions of sediment sorting and hydrodynamic loading the variability of the sea bed. In order to estimate the can assist in interpreting observed sediment distribu- effects of hydraulic engineering measures or the tion patterns. consequences of sea level rise, prognostic models In addition, a highly-resolved description of sedimen- based on sound data sets derived from field measure- tology was realised in the bed model on account of the ments are required. A first step in this direction has work carried out in the areas of key interest. This been taken by way of the KFKI-funded project includes sediment surface mapping, the analysis of “Development of integrated model systems for bed profiles, and seismic investigations for determi- analysing long-term morphodynamics in the German ning the thicknesses of the sediment layers available Bight (AufMod)”. Through interdisciplinary cooperati- for sediment dynamics. on between modellers and geoscientists, it has been Large-scale sediment transport was calculated (see possible to integrate the present state of knowledge in Figure 3) on the basis of the measured bathymetry different scientific disciplines into the research work and also improve our understanding of the system. The main objectives of AufMod are: 1. The development of a plausibilised and as highly consistent sea bed parameter data set as possible (topography, sedimentology) in order to create a functional bed model 2. Development and deployment of numerical models and determination of the applicability and accuracy of these simulation methods based on the hindcasting of past time periods. 3. To gain a better understanding of sediment dynamic processes in representative subsystems of the German Bight by implementing high- resolution hydro-acoustic measuring techniques. The topographic data base compiled in the bed model includes data from surveys carried out by the German Figure 1: Federal Maritime and Hydrographic Agency and the Morphological space (Zmax-Zmin) over the coastal strip of the German Bight up to the 20 m isobath for the period Waterways and Shipping Authorities. For the near- 1996-2011 02 and the findings from the geological analyses in an integrative manner and also improve our understan- ding of the governing processes. ZukunftHallig A (03KIS093) [Future scenario for the halligs, subproject A] Project presentation and analysis of the hydrological and hydrodynamic boundary conditions in the proximity of the halligs Prof. Dr. Jürgen Jensen Arne Arns Figure 2: Dr. Christoph Mudersbach Interpolation of the median value over the full extent of the German Bight, grouped in 1/2 Phi intervals Research Centre for Water Management and the Environment, Department of Hydraulic Engineering and sedimentology and balanced in the German and Hydromechanics, University of Siegen (fwu) Bight. The results show redistributions in the German Bight, especially a net deposition in the nearshore zone. In long-term simulations (100 years), possible Background and introduction changes in this behaviour were investigated for a sea Covering an area of approx. 9000 km², the wadden level rise of 80 cm. No significant differences were sea of the North Sea is one of the largest wetlands in detected, however. the world and provides a habitat for about 10,000 At present, a more extensive validation of the results animal and plant species (UNESCO). Owing to their of these large-scale models can only be achieved special importance, the national parks and biosphere qualitatively or by reverting to integral parameters reserves of the Schleswig-Holstein and Lower Saxony such as redistribution volumes. In contrast, a direct wadden sea were designated as UNESCO world comparison is possible in the case of small-scale heritage sites in 2009. Ten German halligs are simulations in the areas of key interest. By this situated in the middle of the Schleswig-Holstein means, it was possible to interpret the model results wadden sea. This worldwide unique hallig environ- ment evolved to some extent from the remains of former coastal marshes. The major part, however, resulted to a large extent from more recent mud depositions (QUEDENS, 1992). The term “hallig” means more or less “flat” or “low” and characterises the slight difference
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