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Runtime Comparisons between SWMM 4 and SWMM 5 using Continuous Simulation Model Networks

Carl C. Chan, Robert E. Dickinson and Edward Burgess (2005)
CDM Smith
DOI: https://doi.org/10.14796/JWMM.R223-11
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Abstract

The Stormwater Management Model (SWMM) is a dynamic rainfall-runoff model used for continuous simulation of runoff quantity and quality. SWMM has recently been redeveloped under a Cooperative Research and Development Agreement (CRADA) between CDM Inc. and the U.S. Environmental Protection Agency (USEPA). One of the purposes of the CRADA is to improve the numerical stability of the model without changing the fundamental characteristics of the EXTRAN solution or sacrificing the efficiency of its performance. Extensive QA/QC testing was performed as part of the CRADA to ensure consistency between the SWMM4 and SWMM5 solutions. (Dickinson et al., 2004; Rossman et al., 2003; Schade, 2002; Chan et al., 2003). Another aspect of QA/QC testing was to compare simulation runtimes between SWMM4 and SWMM5.

This chapter presents the computational speed comparison between SWMM4 (Huber & Dickinson, 1988) and SWMM5 (Rossman et al., 2003). Various SWMM4 historical applications were used and runtimes of SWMM4 and SWMM5 were plotted and compared by different calculation methods.

This chapter also describes the approach used to test the simulation speed in SWMM4 and SWMM5. All models were run on the same computer workstation for fairness in the comparison. The test computer was equipped with a commonly available Pentium® P4-1.6 GHz processor with 256Mb RAM. The SWMM4 models were run with SWMM499 and the new SWMM5 (version Beta E). To ensure data consistency, the historical SWMM4 applications were translated to SWMM5 input format, using the converter software distributed with the SWMM5 package. Results generated from the new SWMM5 were compared to those from the existing SWMM4 model as part of the speed test procedure.

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PAPER INFO

Identification

CHI ref #: R223-11 894
Volume: 13
DOI: https://doi.org/10.14796/JWMM.R223-11
Cite as: CHI JWMM 2005;R223-11

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 2005

Status

# reviewers: 2
Version: Final published

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© 2005 CHI. Some rights reserved.

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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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.

All papers published in the JWMM are licensed under a Creative Commons Attribution 4.0 International License (CC BY).

JWMM content can be downloaded, printed, copied, distributed, and linked-to, when providing full attribution to both the author/s and JWMM.


AUTHORS

Carl C. Chan

CDM Smith, Cincinnati, OH, USA
ORCiD:

Robert E. Dickinson

CDM Smith, Pittsburgh, PA, USA
ORCiD:

Edward Burgess

CDM Smith, Cincinnati, OH, USA
ORCiD:


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