Water quality parameter estimation for water distribution systems considering parameter and measurement uncertainties

M. F.K. Pasha, K. Lansey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Both measurement and parameters uncertainties affect a parameter estimation process. To date measurement uncertainties have been considered during water quality parameter estimation in the water distribution systems (WDS). User defined parameter uncertainties have been avoided. It is known that some parameters in the distribution systems can be uncertain. For example, demand affects both the WDS hydraulics and water quality and is one of the most uncertain parameters. This paper considered nodal demand and temporal demand factor as the uncertain parameters when estimating wall decay coefficients of the water quality model. To account uncertainties in demand parameters hydraulic and water quality simulation model, EPANET was run in Monte Carlo Simulation (MCS) with predefined coefficients of variation for the uncertain parameters. Measurement uncertainties were added then with the mean concentration to create observed data. A meta-heuristic search technique, the Shuffled Frog Leaping Algorithm (SFLA) coupled with EPANET was used then to calibrate the wall decay parameters. Results show that parameters uncertainties can be as important as measurement uncertainties. Measurement uncertainty does not compensate parameters' uncertainties rather it increases the prediction errors.

Original languageEnglish (US)
Title of host publicationWorld Environmental and Water Resources Congress 2010
Subtitle of host publicationChallenges of Change - Proceedings of the World Environmental and Water Resources Congress 2010
Pages4374-4382
Number of pages9
DOIs
StatePublished - Aug 2 2010
EventWorld Environmental and Water Resources Congress 2010: Challenges of Change - Providence, RI, United States
Duration: May 16 2010May 20 2010

Publication series

NameWorld Environmental and Water Resources Congress 2010: Challenges of Change - Proceedings of the World Environmental and Water Resources Congress 2010

Other

OtherWorld Environmental and Water Resources Congress 2010: Challenges of Change
CountryUnited States
CityProvidence, RI
Period5/16/105/20/10

Keywords

  • Parameters
  • Water distribution systems
  • Water quality

ASJC Scopus subject areas

  • Water Science and Technology

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