Translations:Einzugsgebietsfenster/8/en

The data to be entered in the Topography section is typically determined in a GIS. The area of the sub-basin is crucial for the amount of generated runoff, since the precipitation is processed into the Precipitation-Runoff-Modell as precipitation height [mm] and, therefore, has to be scaled with the area.

The degree of imperviousness dictates the percentage of impervious area in the sub-basin and describes the proportion that runs off as urban surface runoff. The urban surface runoff is calculated separately from the remaining natural surface runoff and retained in a separate storage cascade. The discharge allocation can also be used to assign it to a different discharge element. The input for longest flow distance and maximum and minimum height are used for the automatic calculation of the retention constants of surface runoff.