Uncertainty assessment

Jean-Luc Bertrand-Krajewski, Mathias Uhl, F.H.L.R. Clemens

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Assessing uncertainties in measurements must become a standard practice in the field of urban drainage andstormwater management. This chapter presents three standard methods to estimate uncertainties: the Type Amethod (repeated measurements), the Type B method (law of propagation of uncertainties) and the MCmethod (Monte Carlo method). Each method is described with its fundamental principles and equations,various examples are presented in detail and Matlab® codes are given to facilitate the calculations forroutine applications. An advanced method to account for partial autocorrelation in time series ispresented. Lastly, typical orders of magnitude of standard uncertainties for usual sensors used in urbandrainage and stormwater management are given.
Original languageEnglish
Title of host publicationMetrology in Urban Drainage and Stormwater Management
Subtitle of host publicationPlug and Pray
EditorsJean Luc Bertrand-Krajewski, Francois Clemens-Meyer, Mathieu Lepot
PublisherInternational Water Association (IWA)
Number of pages64
ISBN (Electronic)978-1-7890-6011-9
ISBN (Print)978-1-7890-6010-2
Publication statusPublished - 2021


  • Coverage interval
  • error
  • guide for uncertainty in measurements
  • law of propagation of uncertainties
  • Monte Carlo method
  • standard uncertainty


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