000K  utf8
1100  $c2003
1500  ger
2050  urn:nbn:de:gbv:8-diss-7557
3000  Diesing, Markus
4000  Die Regeneration von Materialentnahmestellen in der südwestlichen Ostsee unter besonderer Berücksichtigung der rezenten Sedimentdynamik$hChristian-Albrechts-Universität zu Kiel  [Diesing, Markus]
4030  Kiel$nChristian-Albrechts-Universität zu Kiel
4209  Two differently exposed research areas (Graal-Müritz and Tromper Wiek), which are typical for the south-western Baltic Sea coast were investigated in order to assess the recent sediment dynamics and the processes and time scales of the regeneration of aggregate extraction sites. For both field sites, the extension of the upper and lower shoreface was evaluated from hydrodynamical and sedimentological data. Repeated sidecan sonar surveys and sedimentological investigations show a very low variability of sediment distribution patterns and grain size distributions on the lower shoreface of both research areas at seasonal time-scales. The proccesses of re-filling of 3 extraction sites, differing in respect to water depth, extraction method and extracted material were identified. Time scales of regeneration were assessed for those sites. Differences in the velocity of regeneration can be explained by the position of the extraction sites relative to the seaward limit of the shoreface, the character and availability of the potential material for regeneration and the depth of the extraction. The fundamental problem is, that aggregate extraction seaward of the shoreface implies long time spans of regeneration, while extractions on the shoreface can be re-generated quite fast; nevertheless, there is a potential of negative effects on the sediment budget. As a consequence, there is no "ideal" location for marine sediment extraction. The appropriate place for extraction should be a well-balanced compromise allowing relatively fast regeneration together with a minimized impact on the coastal sediment budget. In order to fulfill those requirements detailed knowledge about sediment budgets, availability and dynamics in the considered area is neccessary.
4950  https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-7557$xR$3Volltext$534
4961  https://macau.uni-kiel.de/receive/diss_mods_00000755
5051  550
5550  aggregate extraction
5550  Baltic Sea
5550  Erneuerbare Ressourcen
5550  Germany
5550  Graal-Müritz
5550  hydrodynamics
5550  morphodynamics
5550  Ostseeküste <Südwest>
5550  Sandabbau
5550  Sandlagerstätte
5550  Sedimentation
5550  sediment dynamics
5550  sedimentology
5550  shoreface
5550  sidescan sonar
5550  time scales
5550  Tromper Wiek