TY - JOUR
T1 - Exchange between drainage systems and surface flows during urban flooding
T2 - Quasi-steady and dynamic modelling in unsteady flow conditions
AU - Kitsikoudis, Vasileios
AU - Erpicum, Sebastien
AU - Rubinato, Matteo
AU - Shucksmith, James D.
AU - Archambeau, Pierre
AU - Pirotton, Michel
AU - Dewals, Benjamin
N1 - Funding Information:
This research was supported by the UK Engineering and Physical Sciences Research Council (EP/K040405/1). The Authors gratefully acknowledge Guillaume Gamart and Marion Payet who, at an early stage of the research, conducted preliminary computational analyses. Open access datasets associated with this research can be found at https://zenodo.org/communities/floodinteract/.
Funding Information:
This research was supported by the UK Engineering and Physical Sciences Research Council (EP/K040405/1). The Authors gratefully acknowledge Guillaume Gamart and Marion Payet who, at an early stage of the research, conducted preliminary computational analyses. Open access datasets associated with this research can be found at https://zenodo.org/communities/floodinteract/ .
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/11/1
Y1 - 2021/11/1
N2 - The accurate modelling of urban flooding constitutes an integral part of flood risk assessment and management in residential and industrial areas. Interactions between drainage networks and surface runoff flows are commonly modelled based on weir/orifice equations; however, this approach has not been satisfactorily validated in unsteady flow conditions due to uncertainties in estimating the discharge coefficients and associated head losses. This study utilises experimental data of flow exchange between the sewer flow and the floodplain through a manhole without a lid to develop two alternate approaches that simulate this interaction and describe the associated exchange flow. A quasi-steady model links the exchange flow to the total head in the sewer pipe and the head losses in the sewer and the manhole, whilst a dynamic model takes also into account the evolution of the water level within the manhole at discrete time steps. The developed numerical models are subsequently validated against large-scale experimental data for unsteady sewer flow conditions, featuring variable exchange to the surface. Results confirmed that both models can accurately replicate experimental conditions, with improved performance when compared to existing methodologies based only on weir or orifice equations.
AB - The accurate modelling of urban flooding constitutes an integral part of flood risk assessment and management in residential and industrial areas. Interactions between drainage networks and surface runoff flows are commonly modelled based on weir/orifice equations; however, this approach has not been satisfactorily validated in unsteady flow conditions due to uncertainties in estimating the discharge coefficients and associated head losses. This study utilises experimental data of flow exchange between the sewer flow and the floodplain through a manhole without a lid to develop two alternate approaches that simulate this interaction and describe the associated exchange flow. A quasi-steady model links the exchange flow to the total head in the sewer pipe and the head losses in the sewer and the manhole, whilst a dynamic model takes also into account the evolution of the water level within the manhole at discrete time steps. The developed numerical models are subsequently validated against large-scale experimental data for unsteady sewer flow conditions, featuring variable exchange to the surface. Results confirmed that both models can accurately replicate experimental conditions, with improved performance when compared to existing methodologies based only on weir or orifice equations.
KW - UT-Hybrid-D
U2 - 10.1016/j.jhydrol.2021.126628
DO - 10.1016/j.jhydrol.2021.126628
M3 - Article
VL - 602
JO - Journal of hydrology
JF - Journal of hydrology
SN - 0022-1694
M1 - 126628
ER -