Improved understanding of combined sewer systems using the Illinois Conveyance Analysis Program (ICAP)

Nils Oberg, Arthur R. Schmidt, Blake J. Landry, Arturo S. Leon, Andrew R. Waratuke, José M. Mier, Marcelo H. García

Research output: Contribution to journalArticle

Abstract

Understanding the conveyance of sewer networks is vital, especially in cases of great variability in flow rates, such as in combined sanitary and storm sewer systems. Conventional conveyance studies in sewer systems often have extended computation times due to complexity of the solution, or alternatively make assumptions that ignore the water-surface profile within a pipe. In previous research, the hydraulic performance graph (HPG) was successfully used for open-channel capacity determination. The HPG summarizes the results of many backwater calculations for a reach so that these calculations do not need to be repeated. This article describes algorithms utilized by the Illinois Conveyance Analysis Program that uses the HPGs to describe the conveyance of a system, identify bottlenecks for varying conditions, conserve mass by tracking outflow and overflows under stepwise steady flow conditions. The software is freely available at https://github.com/obergshavefun/icap/wiki.

Original languageEnglish (US)
Pages (from-to)811-819
Number of pages9
JournalUrban Water Journal
Volume14
Issue number8
DOIs
StatePublished - Sep 14 2017

Keywords

  • CSO
  • bottleneck analysis
  • combined sewer systems
  • conveyance analysis
  • hydraulic performance graph
  • open source

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

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