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