|Title||Full-coverage seafloor mapping in the German Exclusive Economic Zone: interim results on coverage and geodata|
|Download||Download (whole publication) |
|Author||Propp, C; Bartholoma, A; Hass, C; Holler, P; Papenmeier, S; Richter, P; Schwarzer, K; Tauber, F; Zeiler, M|
|Source||Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada; by Todd, B J; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; Geological Survey of Canada, Open File 8295, 2017 p. 97,
https://doi.org/10.4095/305915 (Open Access)|
|Links||Download mapping guideline|
|Publisher||Natural Resources Canada|
|Meeting||2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; May 1-4, 2017|
|Related||This publication is contained in Todd, B J; Brown, C J;
Lacharité, M; Gazzola, V; McCormack, E; (2017). Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada, Geological Survey of Canada, Open File 8295|
|Area||German Exclusive Economic Zone; North Sea; Baltic Sea; Germany|
|Lat/Long WENS|| 2.0000 14.2500 56.0000 53.0000|
|Subjects||marine geology; surficial geology/geomorphology; environmental geology; geophysics; mapping techniques; oceanography; marine environments; coastal studies; conservation; marine organisms; marine
ecology; resource management; biological communities; environmental studies; ecosystems; offshore areas; marine sediments; source areas; benthos; geophysical surveys; acoustic surveys, marine; sonar surveys; side-scan sonar; photography; grab
samples; geophysical interpretations; modelling; continental margins; continental shelf; geological mapping; geological mapping techniques; biology; habitat mapping; habitat conservation; habitat management; guidelines|
|Program||Ocean Management Geoscience, Offshore Geoscience|
|Released||2017 09 26|
|Abstract||Offshore activities and marine environment protection promote the substantial need of habitat maps that sufficiently characterize and represent the abiotic and biotic conditions on the sea floor.
Therefore, detailed information of seabed sediment types is essential for a wide range of applications. According to the implementation of EU directives, high-resolution sediment data are a prerequisite for the identification, monitoring and
protection of marine benthic biotopes in European marine waters. |
Midyear 2012, the Federal Maritime and Hydrographic Agency (BSH) of Germany has started a sediment mapping program in cooperation with the Federal Agency for Nature Conservation
(BfN) based on side-scan sonar and ground truthing using grab sampler and underwater video. To establish a standardized mapping procedure, BSH and its R&D partners AWI, CAU, IOW and SaM have developed a technical guideline on the requirements for the
collection, processing and interpretation of side-scan sonar backscatter data. For the latter, standardized strategies were defined for the classification and discrimination of different seafloor sediment types in order to minimize the subjectivity
of expert interpretation.
Different levels of classification have been introduced for the sediment types, primarily based on the FOLK scheme. In addition, sand is classified according to the national classification scheme (Figge classification)
to meet the requirements for biotope modelling on the sandy shelf of the German North Sea sector. Datasets of sediment distribution include additional information about the genesis of sediment types as well as the type of transition between them.
Data collection and processing could be finalized for large areas, older data has been processed and the interpretation of backscatter mosaics according to the guideline is ongoing steadily. Here, the actual status of these works is shown and
latest difficulties are discussed.