TrilaWatt: Wadden areas (WFS)

Definitions: Watt is flooded during tide flooding and falls dry in tide low water. A delimitation of the tidal flats therefore depends on the course of tide flooding and tide low water. However, the spatial and temporal variability of tide high and tide low water leads to a variety of possible extensions of watts on daily, monthly, annual or decadal time scales. This already large variability is additionally superimposed by the long-term change of tide and topography. Product: This dataset from the TrilaWatt project includes the topography of the watt for the Deutsche Buch and the Netherlands, based on yearly averaged data of tide high and tide low water. On this basis, mean tide high and tide low water lines as well as their blur (±25cm) were derived. The intertidal area results from the intersection of yearly interpolated topography and yearly, average tide high and tide low water data of the digital twin. Evaluations of intertidal, supratidal, flood and low-water lines will be made available for the period from 2015 to 2021 inclusive. The data products are provided in GeoTIFF format and as shape files. The service provides evaluations on intertidal, supratidal areas as well as flood and low-water lines. Quotation for this dataset (Data DOI): Lepper, R., Lorenz, M., Milbradt, P., Pineda Leiva, D. F. (2025): TrilaWatt: Wadden areas (2015-2021) [Data set]. Bundesanstalt für Wasserbau. https://doi.org/10.48437/5a882d-b3a571 English: This dataset contains the annual topography of the intertidal zone of the Wadden Sea as an intersect of modeled charged averaged tidal high and low water with topography data. Based on the Intertidal Topography, We Estimated Annually: The Characteristics of Tidal Low Water Line, Tidal High Water Line, and Their Uncertainty. Download: A download is located under references (in German: "References and Downloads").