Data products

TrilaWatt creates consistent and harmonized data bases and thus enables area-wide statements for the entire Trilateral Wadden Sea for the first time. This applies to the morphodynamically influenced depth structure as well as to the bottom properties. Based on analyses of hydrodynamic long-term simulations for the entire area, parameters can be determined that characterize the system behavior.

TrilaWatt makes a crucial contribution to the Trilateral Wadden Sea World Heritage Site according to the data-information-knowledge-wisdom (DIKW) concept for collecting, organizing and interpreting data on the way to in-depth system understanding for efficient decision making (Tedeschi 2019).

Based on annually updated data sets on bathymetry, numerical simulation models are used to investigate hydrodynamics, also taking into account variable grain size distributions. The documentation of all results is done with metadata for catalog systems like MDI-DE. Visualization and download of the data products is realized with interactive web services.


Our task

  • The relief of the seafloor (e.g. bathymetry) is highly dynamic. Channel displacements of several 100m per year are not uncommon.
  • For this reason, regular measurements (soundings) are carried out.
  • However, the size of the Wadden Sea (11,000 km²) makes large measurement campaigns impossible, which is why a large number of local soundings are available.

Our mission:

  • We will unify all available data into annual bathymetry data products with 1m grid resolution and make these data available FAIR.
  • An example of a 10m bathymetry is given on the left.


  • Surface sediments are less dynamic than bathymetry; nevertheless, their distribution also changes over time.
  • Surface sediments are sampled far less than bathymetries, which is why we are using data-driven and numerical models to increase data availability.
  • The goal is decadal regular 10m grids of grain size distributions in the target area.


  • We calculate the entire North Sea for reliable statements in the focus area Trilateral Wadden Sea.
  • Result parameters are tide, salinity, temperature and suspended sediment concentration.
  • From the simulation data, we determine parameters such as bottom shear stresses, inundation durations, etc., which are suitable for reporting tasks, and
  • perform harmonic analyses of the water level.
  • The aim is to provide system parameters that are relevant to practice over a wide area and limited in time.

TrilaWatt’s comprehensive data products are displayed using Web Mapping Services (WMS) and are usually downloadable using Web Feature Services (WFS). Wep Processing Services (WPS) can be used to interactively define sections, calculate comparisons within them, and perform other user-specific operations on the data.