A new sewage exfiltration model parameters and calibration

摘要

Exfiltration of waste water from sewer systems represents a potential danger for the soil and thenaquifer. Common models, which are used to describe the exfiltration process, are based on the lawnof Darcy, extended by a more or less detailed consideration of the expansion of leaks, thencharacteristics of the soil and the colmation layer. But, due to the complexity of the exfiltrationnprocess, the calibration of these models includes a significant uncertainty. In this paper, a newnexfiltration approach is introduced, which implements the dynamics of the clogging process and thenstructural conditions near sewer leaks. The calibration is realised according to experimental studiesnand analysis of groundwater infiltration to sewers. Furthermore, exfiltration rates and the sensitivitynof the approach are estimated and evaluated, respectively, by Monte-Carlo simulations.