Translations:Einzugsgebiet/30/en

Using a CN value that is dependent on the soil type and land use (see /DVWK, 1991/), the initial losses and a relationship between the runoff coefficient and the accumulated rainfall amount up to the current point in time can be derived, both of which are dependent on antecedent conditions /Zaiss, 1987/. With this approach, the runoff coefficient increases with increasing precipitation amount during the course of the rainfall event. The quantification of the previous conditions is based on the 21-day-precipitation index [math]\displaystyle{ VN }[/math].