Modelling chlorine decay in a pilot scale water distribution system subjected to transient

Hyunjun Kim, Sanghyun Kim, Jayong Koo

Research output: Contribution to journalConference articlepeer-review

16 Scopus citations


The reduction of residual chlorine concentration in water distribution systems depends on hydraulic conditions. Prediction models for chlorine decay in water distribution system were based on an assumption of steady flow. In actual systems, the flow condition is frequently governed by transients generated through valve control or pumping action. The chlorine concentration can be affected by pressure variations from water hammer events, but there have been few studies on the impact of transient on chlorine concentration. A pilot-scale pipeline system and automatic transient generating device was fabricated. Transients were introduced into the pipeline system in three different frequencies. Time series of the chlorine concentration were obtained through experimental periods. Conventional chlorine decay kinetic models were tested to model the temporal variation in chlorine concentration. The chlorine decay patterns were modelled in the context of the number of transient generation.

Original languageEnglish
Pages (from-to)370-378
Number of pages9
JournalProcedia Engineering
Issue number1
StatePublished - 2015
EventIUTAM Symposium on the Dynamics of Extreme Events Influenced by Climate Change (2013) - Freiburg, Germany
Duration: 6 Sep 20159 Sep 2015


  • Chlorine concentration
  • Transient
  • Water Distribution system


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