Probabilistic modelling of combined sewer overflow using the First Order Reliability Method.
This paper presents a new and alternative method (in the context of urban drainage) for probabilistic hydrodynamical analysis of drainage systems in general and especially prediction of combined sewer overflow. Using a probabilistic shell it is possible to implement both input and parameter uncertainties on an application of the commercial urban drainage model MOUSE combined with the probabilistic First Order Reliability Method (FORM). Applying statistical characteristics on several years of rainfall, it is possible to derive a parameterization of the rainfall input and the failure probability and return period of combined sewer overflow to receiving waters can be found.
Thorndahl
S
S
Department of Civil Engineering, Aalborg University, Sohngaardsholmsvej 57, 9000 Aalborg, Denmark. st@civil.aau.dk
Schaarup-Jensen
K
K
Jensen
J B
JB
D004323:Drainage, Sanitary / Q000379:methods; D004784:Environmental Monitoring / Q000379:methods; D008962:Models, Theoretical; D015203:Reproducibility of Results; D012722:Sewage / Q000737:chemistry*; D014872:Water Movements
D012722:Sewage