The impact of hydraulic model calibration on model-based leak localization accuracy: Conclusions drawn from a real-world case study

Jakim P. Lippacher, David B. Steffelbauer, Georg Arbesser-Rastburg, Daniela Fuchs-Hanusch

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

This study examines the influence of the quality of hydraulic model calibration on the accuracy of model-based leak localization. It is based on a real-world case study where pressures were measured at 12 positions for more than 4 months. Fire flow tests were performed to obtain calibration data—artificially generated leaks with different sizes between 0.25 l/s to 1 l/s at 4 different positions served as dataset for model-based leak localization. Three different calibration approaches were applied on an uncalibrated model generated from GIS data: (i) height adjustments of measurement positions through detailed analysis of long term pressure signals in the leak-free system; as well as (ii) manual trial and error calibration; and (iii) automatic calibration with fire flow test data. The height-adjusted model lead to increased leak localization accuracy compared to the uncalibrated GIS model. However, the most significant improvement was achieved through fire flow test based calibration—revealing a partially closed valve in the system. The auto-calibrated model, which simultaneously calibrated roughness and minor loss coefficients, provided the highest leak localization accuracy.
Original languageEnglish
Title of host publicationWorld Environmental and Water Resources Congress 2019
Subtitle of host publicationHydraulics, Waterways, and Water Distribution Systems Analysis - Selected Papers from the World Environmental and Water Resources Congress 2019
EditorsGregory F. Scott, William Hamilton
PublisherAmerican Society of Civil Engineers (ASCE)
Pages520-527
Number of pages8
ISBN (Electronic)9780784482353
Publication statusPublished - 2019
Event19th World Environmental and Water Resources Congress 2019: Hydraulics, Waterways, and Water Distribution Systems Analysis - Pittsburgh, United States
Duration: 19 May 201923 May 2019

Conference

Conference19th World Environmental and Water Resources Congress 2019: Hydraulics, Waterways, and Water Distribution Systems Analysis
CountryUnited States
CityPittsburgh
Period19/05/1923/05/19

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