Impact of combined sewer overflow on urban river hydrodynamic modelling: a case study of the Chicago waterway

Zhenduo Zhu, Viviana Morales, Marcelo H. Garcia

Research output: Contribution to journalArticle

Abstract

Combined sewer overflow (CSO) can be a critical inflow source for urban rivers during storm events. This paper presents a case study of the Chicago waterway. A three-dimensional (3D) river hydrodynamic model was developed and integrated with an urban rainfall-runoff model using the Open Modelling Interface (OpenMI). Both the effects of CSO discharge on river and river water levels on CSO outlets were considered by the integrated model. A historical storm, which was similar to a 100-year return period rain event, was simulated and compared with field measurements. This study highlights the necessity of quantifying CSO for hydraulic modelling of urban rivers under extreme storm event conditions, and shows that an integrated hydrologic and hydraulic approach can be used to address this challenge. The 3D river hydrodynamic model can deal with the complex hydrodynamics at river confluences and provide better hydrodynamic results for water quality modelling in the future.

Original languageEnglish (US)
Pages (from-to)984-989
Number of pages6
JournalUrban Water Journal
Volume14
Issue number9
DOIs
StatePublished - Oct 21 2017

Keywords

  • Combined sewer overflow
  • OpenMI
  • integrated hydrologic and hydraulic model
  • three-dimensional model

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

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