TY - JOUR
T1 - Design and performance evaluation of a simplified dynamic model for combined sewer overflows in pumped sewer systems
AU - van Daal-Rombouts, Petra
AU - Sun, Siao
AU - Langeveld, Jeroen
AU - Bertrand-Krajewski, J.-L.
AU - Clemens, Francois
PY - 2016/5/4
Y1 - 2016/5/4
N2 - Optimisation or real time control (RTC) studies in wastewater systems increasingly require rapid simulations of sewer systems in extensive catchments. To reduce the simulation time calibrated simplified models are applied, with the performance generally based on the goodness of fit of the calibration. In this research the performance of three simplified and a full hydrodynamic (FH) model for two catchments are compared based on the correct determination of CSO event occurrences and of the total discharged volumes to the surface water. Simplified model M1 consists of a rainfall runoff outflow (RRO) model only. M2 combines the RRO model with a static reservoir model for the sewer behaviour. M3 comprises the RRO model and a dynamic reservoir model. The dynamic reservoir characteristics were derived from FH model simulations. It was found that M2 and M3 are able to describe the sewer behaviour of the catchments, contrary to M1. The preferred model structure depends on the quality of the information (geometrical database and monitoring data) available for the design and calibration of the model. Finally, calibrated simplified models are shown to be preferable to uncalibrated FH models when performing optimisation or RTC studies.
AB - Optimisation or real time control (RTC) studies in wastewater systems increasingly require rapid simulations of sewer systems in extensive catchments. To reduce the simulation time calibrated simplified models are applied, with the performance generally based on the goodness of fit of the calibration. In this research the performance of three simplified and a full hydrodynamic (FH) model for two catchments are compared based on the correct determination of CSO event occurrences and of the total discharged volumes to the surface water. Simplified model M1 consists of a rainfall runoff outflow (RRO) model only. M2 combines the RRO model with a static reservoir model for the sewer behaviour. M3 comprises the RRO model and a dynamic reservoir model. The dynamic reservoir characteristics were derived from FH model simulations. It was found that M2 and M3 are able to describe the sewer behaviour of the catchments, contrary to M1. The preferred model structure depends on the quality of the information (geometrical database and monitoring data) available for the design and calibration of the model. Finally, calibrated simplified models are shown to be preferable to uncalibrated FH models when performing optimisation or RTC studies.
KW - Calibration
KW - Conceptual models
KW - Full hydrodynamic models
KW - Integrated modelling
KW - Monitoring
KW - Urban drainage systems
UR - http://resolver.tudelft.nl/uuid:e3003c8a-2b61-4bd8-be6a-38cb739a0970
U2 - 10.1016/j.jhydrol.2016.04.056
DO - 10.1016/j.jhydrol.2016.04.056
M3 - Article
SN - 0022-1694
VL - 538
SP - 609
EP - 624
JO - Journal of Hydrology
JF - Journal of Hydrology
IS - July
ER -