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  • The maps show a total of 14 newly interpreted base horizons (Middle Miocene unconformity to the base of the Zechstein) of depth maps and a total of 13 layer thickness maps from the Lower Miocene to the Zechstein.

  • A bathymetric map shows the topography of the seabed using depth contours. For the GPDN project area, it was necessary to create a specially adapted bathymetric map in order to achieve a uniform reference level for the creation of various 3D models, among other things.

  • Web Map Service (WMS) of the BUEK2000. The BUEK2000 Version 1.0 was compiled from the BÜK1000 map by a process of generalization. The number of soil mapping units in the legend was reduced from 72 to 60 by aggregation of those units showing similar dominamt soils into single units. The map combined with selected soil profile pictures/graphics and information about soil history, soil classification and soil mapping in Germany is one fundamental part of the Hydrological Atlas of Germany (HAD). The Version 2.0, based on the BUEK2000N, Version 2.3, was cartographically adapted to a new base map.

  • The map "Sediment classes for dredging works" presents information on the distribution of sediments of the same nature at the seabed surface down to a depth of 0.2 m and for the depth ranges 0-1 m and 0-2 m in accordance with DIN 18311 (2010) - Dredging works in 7 classes (see legend) on a scale of 1 : 250,000. The map is based on sediment samples from the seabed surface down to a depth of 0.2 m as well as layer descriptions from boreholes at a depth of 0.2 m and in the above-mentioned depth ranges, which were available in the German North Sea area until January 2013. Dredging works are necessary when, for example, shoals in waterways caused by sediment shifting have to be removed, material has to be taken out of the sea for coastal protection measures or construction purposes, and when pipelines or cables have to be laid in the seabed. One basis for commissioning and implementing the corresponding work is "DIN 18311 - General technical regulations for construction work - Dredging work". This classifies the soil types to be encountered according to their nature into 10 classes, which are the basis for the evaluation of sediment data on the seabed of the North Sea.

  • Between 1977 and 1983, the Federal Institute for Geosciences and Natural Resources (BGR) took approx. 80,000 water samples and 70,000 sediment samples from streams and rivers in several sampling campaigns on the territory of the Federal Republic of Germany at that time and examined them geochemically. In addition to the geochemical prospection of areas with potentially deposits, the aim of the investigations was also to record indications of anthropogenic environmental pollution. The results of these investigations were published in the Geochemical Atlas of the Federal Republic of Germany (Fauth et al., 1985). The data collected within the framework of the Geochemical Atlas of the Federal Republic of Germany in 1985 is a geochemical survey of the former territory of the Federal Republic of Germany which is unique in its high sampling density. All later geochemical investigations were carried out with a much lower sampling density. This valuable and irretrievable data is now being made generally available via the BGR geoportals. In addition to the digital provision of the original data material, the texts from Fauth et al. (1985) and distribution maps produced according to the method used in 1985, the data were reprocessed using modern methods. The WMS shows the distribution of the measured element concentrations and parameters in stream waters in five different coloured point and colour shaded contour maps for each element or parameter.

  • The data set includes meta data from sedimentary samples taken within the exclusive economic zone of Germany that are affected by the Geological Data Act. Also includes information on applied laboratory methods.

  • The map of the BGR geoscientific collections displays the localities of the collection‘s objects. Two different types of positions are presented: localities based on available coordinates (´Fundort erfasst´) and subsequently generated coordinates based on descriptions (´Position ermittelt´). The BGR-Geoviewer provides a link directly to the GewiS application (https://gewis.bgr.de) and thus to the description of the collection objects.

  • The maps show the thickness (in m) of the Holocene and Pleistocene layer sequences and the depth (in m below sea level) of the base of the Holocene and Pleistocene sedimentary sequences in the area of the German North Sea. For a more detailed description, see the associated data set.

  • The map shows the average annual groundwater recharge of Germany for the period 1961 - 1990 as a raster image in a cell range of 1 x 1 km. For this purpose, a multi-step regression model was developed (Neumann, J. 2005). In a first step, the baseflow index (BFI = baseflow / total runoff) was determined as the regression target size as a function of slope gradient, drainage density, land cover, available field capacity, depth to groundwater and the ratio of direct runoff to total runoff. Based on this, two different model variants were developed for low-drainage (R 200 mm/a) and high-drainage regions (R 200 mm / a). For R 200 mm/a, groundwater recharge rates were calculated by multiplying the regional grid-based baseflow index and the area-differentiated total runoff according to BAGLUVA. For the higher values R 200 mm/a, a second regression equation has been used which, in addition to the base flow index, also requires the BAGLUVA total runoff and the depth to groundwater.

  • The map shows the representative chemical content of groundwater for 22 hydrogeological subregions of Germany. The classification of each sub-region was based on the TDS value (total dissolved solids) and the chemical inventory. According to the degree of mineralization, five classes of waters were distinguished (very small, low, medium, high and strongly changing solution contents). The classification of the waters by their chemical inventory was made according to the equivalent percentage of the main cations and anions based on the Piper quadruple diagram. With this chemical classification and the degree of mineralization, 22 geogenic groundwater types could be differentiated throughout Germany. The basis for the mapping of geogenic groundwater quality is the "Hydrogeological Regions" map. The water quality data comes from the groundwater monitoring networks of the German federal states, which were collected by the State Geological Surveys or the State Environmental Surveys. Further analyses are based on the data of the former Central Geological Institute (ZGI) of the GDR. In total, sample data of nearly 8,000 observation wells have been evaluated.