Soil sealing Hamburg

Sealing card: With the description of the extent of soil sealing, a quantitative overview of the expansion of urban settlement areas can be given as well as qualitative influences, e.g. on the urban climate and groundwater regeneration can be mapped. The description of the degree of sealing is based on the biotope mapping in Hamburg and will be updated every five years (latest processing status in 2021). In order to enable the comparative evaluation and the cartographic representation of the sealing degrees, a classification into sealing classes was additionally carried out - analogous to the procedure of previous evaluations - since the large number of different sealing degrees would make the results illegible. In order to achieve a high and yet clear resolution, class widths of 10% were chosen, which leads to the formation of a total of 10 classes (Class 1 = 0-10%, ..., Class 10 = 90-100%). If the wingspan of the degree of sealing was more than 10%, a sealing class was assigned that corresponded to the dominant sealing (e.g. single-house building, compacted - sealing degree 30-70% with predominantly 60 % = sealing class 6). The maps were edited and published in February 2022.