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[[Datei:Einzugsgebietsfenster Topographie_EN.PNG|right]]The data to be entered in the Topography section is normally determined from a GIS. The area of the catchment area is decisive for the amount of runoff that is generated in this catchment area, because the precipitation as precipitation height is included in the NA calculation and is therefore still scaled with the area.
[[Datei:Einzugsgebietsfenster Topographie_EN.PNG|right]]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-model as precipitation height [mm] and, therefore, has to be scaled with the area.
The degree of sealing determines the proportion of sealed area in the total area and describes the proportion that runs off as urban surface runoff. The urban surface runoff is separated from the remaining natural surface runoff [[Special:MyLanguage/Einzugsgebiet#Oberflächenwasservorrat (versiegelter Flächenanteil)|calculated]] and retained in a separate [[Special:MyLanguage/Einzugsgebiet#Abflusskonzentration|storage cascade]]. The [[Special:MyLanguage/Einzugsgebietsfenster#Ablaufzuordnung|discharge allocation]] can also be used to assign it to a different discharge element.
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 [[Special:MyLanguage/Einzugsgebiet#Oberflächenwasservorrat (versiegelter Flächenanteil)|calculated]] separately from the remaining natural surface runoff and retained in a separate [[Special:MyLanguage/Einzugsgebiet#Abflusskonzentration|storage cascade]]. The [[Special:MyLanguage/Einzugsgebietsfenster#Ablaufzuordnung|discharge sequence assignment]] can also be used to assign this runoff to a different outflow element.
The input for longest flow distance and maximum and minimum height are used for the automatic calculation of the [[Special:MyLanguage/#retention--oberflächenabfluss|retention constants of surface runoff]].
The values for longest flowpath and maximum and minimum elevation are used to automatically calculate the [[Special:MyLanguage/#retention--oberflächenabfluss|surface runoff retention constants]].
Aktuelle Version vom 26. Januar 2021, 14:38 Uhr
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-model 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 sequence assignment can also be used to assign this runoff to a different outflow element.
The values for longest flowpath and maximum and minimum elevation are used to automatically calculate the surface runoff retention constants.