Translations:Einzugsgebiet/21/en: Unterschied zwischen den Versionen

Version vom 25. November 2020, 10:56 Uhr

Information zur Nachricht (bearbeiten)

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Nachricht im Original (Einzugsgebiet)

Der Muldenverlust MV wird durch den Anwender vorgegeben. Der Standard- und gleichzeitig Maximalwert im Modell beträgt 4 mm
Der Muldenverlust stellt den Mittelwert für eine geneigte Oberfläche dar. Da die Mulden jedoch nicht gleichmäßig verteilt sind und erfahrungsgemäß bereits ein Abfluss einsetzt, bevor überall die komplette Muldenauffüllung erreicht ist, wird unterstellt, dass jeweils
* 1/3 der versiegelten Fläche einen verminderten Muldenverlust von 1/3·MV
* 1/3 der versiegelten Fläche den mittleren Muldenverlust von 3/3·MV
* 1/3 der versiegelten Fläche einen erhöhten Muldenverlust von 5/3·MV
aufweist. Somit kommt es bereits zum Abfluss, wenn der um die Verdunstungsrate verminderte Niederschlag den Benetzungsverlust und 1/3 des Muldenverlustes übersteigt (bei trockener Vorgeschichte). Die o.g. Annahmen sind in der folgenden Abbildung schematisch skizziert.

Depression losses (MV) are specified by the user. The default and simultaneously maximum value in the model is 4 mm. Depression losses represent an average value for an sloped surface. Since depressions are not evenly distributed and runoff already begins before all depressions are completely filled, it is assumed that

1/3 of the impermeable area has a reduced depression loss of 1/3ċMV
1/3 of the impermeable area has the average depression loss of MV
1/3 of the impermeable area has an increased depression loss of 5/3ċMV

Therefore, runoff already occurs when the precipitation reduced by the evaporation rate exceeds the wetting loss and 1/3 of the depression losses (in case of dry starting conditions). The assumptions described above are shown as a schematic in the following figure.

@@ Zeile 1: / Zeile 1: @@
-The trough loss (MV) is specified by the user. The standard and simultaneously maximum value in the model is 4 mm.
+Depression losses (MV) are specified by the user. The default and simultaneously maximum value in the model is 4 mm.
-The trough loss represents the average value for an sloping surface. However, since the troughs are not evenly distributed and, as experience shows, drainage begins before the complete filling of the troughs has been reached everywhere, it is assumed that
+Depression losses represent an average value for an sloped surface. Since depressions are not evenly distributed and runoff already begins before all depressions are completely filled, it is assumed that
-* 1/3 of the sealed surface has a reduced trough loss of 1/3-MV
+* 1/3 of the impermeable area has a reduced depression loss of 1/3&cdot;MV
-* 1/3 of the sealed area the average trough loss of 3/3-MV
+* 1/3 of the impermeable area has the average depression loss of MV
-* 1/3 of the sealed surface has an increased trough loss of 5/3-MV
+* 1/3 of the impermeable area has an increased depression loss of 5/3&cdot;MV
-has. Therefore, runoff already occurs when the precipitation reduced by the evaporation rate exceeds the wetting loss and 1/3 of the trough loss (in case of dry history). The  assumptions above are schematically sketched in the following figure.
+Therefore, runoff already occurs when the precipitation reduced by the evaporation rate exceeds the wetting loss and 1/3 of the depression losses (in case of dry starting conditions). The assumptions described above are shown as a schematic in the following figure.