EasyGSH-DB: Sedimentology [csv] (1996, 2006, 2016)

Mass-percentage grain fractionation (¼-ϕ intervals) Definition: A sum curve is a continuous, monotonous mathematical function that represents a mass fraction for the corresponding grain size at each point. In order to store this function in a human-readable way, it is discreted at predetermined intervals, here in the ϕ-scaled sum curve in ¼-ϕ increments. Data generation: The basis for sedimentological evaluations are surface sediment samples, which were interpolated from individual samples of different years to a grid valid for one year by means of anisotropic interpolation methods and taking hydrodynamic factors and erosion and sedimentation processes into account. At each of these grid nodes, the sediment distribution is therefore present as a sum curve. For the German Bight, this basic product is available in the 100 m grid for the years 1996, 2006 and 2016, and in the 250 m grid for the Exclusive Economic Zone of Germany for the year 1996. In the value range ϕ = -10 to ϕ = 10, the sum of the mass portion of the respective interval is calculated in ¼-ϕ steps from these sum curves and stored in tables. Product: 100 m grid of the German Bight (1996, 2006, 2016) and 250 m grid of the Exclusive Economic Zone (1996), where the following information is provided for each grid node: • Information about the data creator (by interpolation and rasterization smile consult GmbH) • Sample designation (by interpolation and rasterization sequence number) • Date of validity of the grain distribution • Location of grain distribution • Height of grain distribution • Coordinate system • Median grain diameter d50 • Tabular list of ¼ ϕ intervals with their mass shares The product is provided in CSV format. Quotation for this dataset (Data DOI): Sievers, J., Rubel, M., Milbradt, P. (2020): EasyGSH-DB: Subject area - sedimentology. Bundesanstalt für Wasserbau. https://doi.org/10.48437/02.2020.K2.7000.0005 English Download: The data for download can be found under References, where the data can be downloaded directly or via the web page redirection to the EasyGSH-DB portal.