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Impacts of Parameter Uncertainty and Seasonal Variation on a Regional Model

Benjamin J. Sherman and Mark J. TenBroek (1999)
Camp Dresser & McKee
https://doi.org/10.14796/JWMM.R204-12
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Abstract

The most recent release of the City of Detroit regional sewerage collection system SWMM model includes refinements and/or improved characterization of various model parameters such as directly connected impervious area (DCIA), rainfall dependent inflow and infiltration (RDI/I) and dry weather flow (DWF). After these improvements to the model were implemented, the Michigan Department of Environmental Quality (MDEQ) requested that the uncertainty in model parameters and the impacts of this uncertainty on the model results be evaluated. In addition to model parameter uncertainty, the seasonally varying parameters were evaluated to assess the impacts of temporal distribution. A simplified approach to evaluating the temporal distribution in seasonally varying parameters was used by comparing model results of annually averaged conditions and seasonally varying value conditions. The parameter uncertainty impacts analyses were based on a new assessment approach. The results suggest using this approach in lieu of sensitivity analysis. This approach and subsequent results are discussed in this chapter.

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PAPER INFO

Identification

CHI ref #: R204-12 1045
Volume: 7
Cite as: CHI JWMM 1999;R204-12
https://doi.org/10.14796/JWMM.R204-12

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 1999

Status

# reviewers: 2
Version: Final published

Copyright

© 1999 CHI. Some rights reserved.

The Journal of Water Management Modeling is an open-access (OA) publication. Open access means that articles and papers are available without barriers to all who could benefit from them. Practically speaking, all published works will be available to a worldwide audience, free, immediately on publication. As such, JWMM can be considered a Diamond, Gratis OA journal.

Paper and publication copyrights are summarized here. JWMM content can be downloaded, printed, copied, distributed, and linked-to when providing full attribution to both the author/s and JWMM.


AUTHORS

Benjamin J. Sherman

Camp Dresser & McKee, Detroit, MI, USA

Mark J. TenBroek

Camp Dresser & McKee, Detroit, MI, USA

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