Modelling Coastline Change of the Darss-Zingst Peninsula with Sedsim - The Baltic Sea Basin - page 285

Fig. 14.2 Schematic flow chart and parameters used for the modelling. Sedsim modules used are
listed in brackets
or input oceanic circulation patterns. However, these modules were not used in this
study (Fig. 14.2 ) .
14.4 Data
14.4.1 Digital Elevation Model
Elevation models for the Darss-Zingst peninsula are available from the Land Survey
Administration Mecklenburg-Vorpommern, Germany, in different scales. However,
these data sets comprise only terrestrial elevations. For the modelling with Sedsim a
combined data set is required, which couples bathymetric data with land elevations.
A first, but rough approach is the integration of the data set provided by Seifert et al.
( 2001 ) . This data set comprises land and sea bottom elevation for the area of inves-
tigation with a spatial resolution of approximately 1 km 2 per grid cell. In a second
step, the terrestrial part for this data was replaced by the DEM25 data set from the
Land Survey Administration Mecklenburg-Vorpommern ( 2006 ) . This data set has a
spatial resolution of 25 m. For a high-resolution bathymetry, over 5 million bathy-
metric measurements covering the German Baltic coast provided by the Federal
Maritime and Hydrographic Agency of Germany were used (Meyer et al. 2008 ) .
Finally, the resolution of the resulting elevation model was set to 50 m. However,
initial experiments showed that the amount of data due to this high resolution is
too much to calculate scenarios with Sedsim in a reasonable time. Therefore, the
DEM was resampled to a 150 m resolution, covering the area between 12.11 ◦ east
to 13.17 ◦ east and 54.07 ◦ north to 54.76 ◦ north (Fig. 14.3 ) . The coordinate system
used is Gauss Krüger, meridian stripe #4, on Bessel ellipsoid.