摘要 : On the basis of an extensive data pool comprising data from 34 sewage treatment plants in Baden-Wuerttemberg, different methods are used to calculate additions for infiltration water. A comparison of different methods shows that t... 展开 On the basis of an extensive data pool comprising data from 34 sewage treatment plants in Baden-Wuerttemberg, different methods are used to calculate additions for infiltration water. A comparison of different methods shows that there are narrow limits to the application of established determination methods for infiltration water, and arbitrary impacts cannot be excluded. The sliding minimum method, which we have developed and tested in the course of this project, does not show these weaknesses. It allows for a continuous, retrospective assessment of infiltration water loads based on real values measured in the feed channel of the sewage treatment plants. For all 34 sewage treatment plants, the sewer infiltration water loads are determined over a period of four years. It turns out that additions for infiltration water are very high during certain times and they are a very seasonal phenomenon. Infiltration water additions of more than 700 % are not rare at all during the winter months with their typically high infiltration water loads. 收起