The data set includes the water depths in the flooded areas. Water depths are provided for three flooding scenarios (low (Lo), medium (Me), and high probability (Hi)) of river (RW) and coastal (CW) flooding. The water depths are divided into five classes (0-0.5 m (1), 0.5-1 m (2), 1-2 m (3), 2-4 m (4) and 4 m). In addition, the water depths are divided into three areas: flood area (1), information flood area (2) and flood protection area (3). These two classifications are summarized in the "T_class" attribute. The first number of the attribute "T_class" indicates which area it is and the second number the water depth class. E.g. T_class = 23 designates a floodplain with a water depth of 1.0 - 2.0 m. The flood depth of coastal waters is the difference between the seabed above sea level and the sea chart zero plus the tide height. The Federal Institute for Hydrology (BfG) manages the reporting data on various water-related EC environmental directives in the national water reporting portal (WasserBLIcK) on behalf of the water management authorities in Germany. On the basis of this data, the BfG provides selected map and data services in coordination with the State Working Group on Water (LAWA). The services provided here are based on nationwide homogenized databases. The timeliness of the data is checked by the competent authorities in connection with the completion of a reporting cycle and the data set is updated if necessary. There is therefore no guarantee that the most up-to-date data set from the responsible authorities will be found here. Other administrative levels in Germany (state, district, district, municipality) may provide services on this topic with a higher spatial and temporal resolution.
