An Installed Accuracy Assessment using Dye Dilution Testing for Seven Common Flow Metering Technologies

Stonehouse, Marc C.; TenBroek, Mark J.; Fujita, Gary; Dekker, Timothy J.

doi:10.14796/jwmm.r207-18

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Fluorescent dye can be used to determine discharge by assuming conservation of mass (Fischer et al 1979;Turner Designs Inc. 2022b) and to calibrate flow meters (e.g., Stonehouse et al 2001;Lepot et al 2014). Dye tracing in sewer networks can be simultaneously used to generate model validation data, confirm network geometry, estimate discharge, and determine the dispersion coefficient.…”

Section: Introductionmentioning

confidence: 99%

Quantifying Mixing in Sewer Networks for Source Localization

Sonnenwald

Shuttleworth

Bailey³

et al. 2023

J. Environ. Eng.

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There has been a recent increase of interest in sewer network water quality, both for pollutants and wastewater epidemiology. Of particular interest is the ability to perform cost-effective small-scale monitoring to understand the sewer network and perform source localization (the process of identifying the sources of materials of interest within the network), enabling prioritization of combined sewer overflow (CSO) interventions and targeted response to the detection of infectious diseases. Rhodamine WT fluorescent dye tracing was carried out in the combined sewer networks of four UK cities, for which network geometries were available. Over 100 dye concentration profiles were recorded, from which discharge, travel time (velocity), and dispersion were quantified. A simplified hydraulic and water quality (conservative solute transport) modeling approach was used to investigate dispersion further. A theoretical method for calculating dispersion over a reach with nonuniform properties was derived and used with the models and recorded data to develop a method for estimating the dispersion coefficient in sewers. Novel simultaneous injections into multiple manholes within one sewer network were conducted. Modeling of these injections validated the modeling approach and explained the measured concentration profiles, demonstrating both the potential of hydraulic and solute transport modeling and the new dispersion coefficient predictor for source localization. Such modeling can be used to develop sewer network "fingerprints" and source location probability plots based on residence time distribution (RTD) theory to maximize information from limited water quality monitoring. This will aid managers and operators in identifying potential intermittent sources of material within the network.

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Section: Introductionmentioning

confidence: 99%

Quantifying Mixing in Sewer Networks for Source Localization

Sonnenwald

Shuttleworth

Bailey³

et al. 2023

J. Environ. Eng.

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“…identified. An accurate dye dilution testing protocol using Rhodamine WT was used to quantify flow meter accuracy in the Greater Detroit Regional Sewer System (Stonehouse et al, 2001…”

Section: Generalmentioning

confidence: 99%

Urban Wet‐Weather Flows

Clark

Burian

Pitt

et al. 2002

Water Environment Research

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“…The accuracy and extent of data, while many times taken for granted, may also dramatically affect the quality of the cahbration. For example most properly installed and operating open-channel flow meters and gauging stations are only accurate to within a five-percent range of measured flows (Stonehouse et al, 2001 ). Also, if the measured data is only available for a limited period of time, the model will be similarly limited as it will be based on a small window of the hydrologic response of the system.…”

mentioning

confidence: 99%

Automated Calibration using Optimization Techniques with SWMM RUNOFF

Dent¹,

Hanna

Wright³

2004

JWMM

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The usefulness of a hydrologic model is directly related to its application and how well it is calibrated. Calibration is a subjective exercise where model parameters are adjusted to reduce discrepancies between measured data and modeled predictions. Automated calibration can be used to accelerate the model calibration process, minimize modeler bias, and increase the goodness of fit between measured and modeled hydro graphs. During calibration of a complex hydrologic model, it may be difficult to simultaneously adjust predicted output hydrographs to correspondingly match multiple objectives (peak flows, total volume and shape of the hydrograph). Custom programming was used to link SWMM Runoff version 4.4h with Palisade's Evolver software to improve model goodness of fit. A small sanitary sewer basin was simulated as part of a collection system rehabilitation pilot program to judge the effectiveness of infiltration and inflow (III) removal. A one-month time series of hourly flow measurements were used and calibration was perfonned with an automated calibration method that applied a genetic algorithm solution technique. Several goodness-of-fit metrics revealed an improved calibration for both pre-and post-rehabilitation flow hydrograph, as well as for projected hydrographs to a design event. This study demonstrates an accurate and cost-effective automated method for model calibration that is not only valuable for repeated model analyses perfonned throughout a collection system rehabilitation program, but can also be applied to other watershed models.

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An Installed Accuracy Assessment using Dye Dilution Testing for Seven Common Flow Metering Technologies

Cited by 3 publications

References 2 publications

Quantifying Mixing in Sewer Networks for Source Localization

Quantifying Mixing in Sewer Networks for Source Localization

Urban Wet‐Weather Flows

Automated Calibration using Optimization Techniques with SWMM RUNOFF

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