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Advanced Detention Routing: Improving the Operation and Effectiveness of Detention Facilities

Advanced Detention Routing: Improving the Operation and Effectiveness of Detention Facilities

Instructor


Jennifer J. Walker, P.E.Jennifer J. Walker, P.E.
Ms. Walker is a Project Manager with Dodson & Associates, Inc., a civil engineering firm specializing in water resources. She has more than a decade of experience in water resources planning and design. Her detention routing experience includes land development, site development, transportation, and public works projects. Her other hydrology and hydraulics experience consists of major hydrologic / hydraulic studies; channel improvements projects; detention facility, channel, and storm sewer designs; master drainage studies; drainage criteria manual development; watershed impact analyses; pump station analyses; and drainage study / plan review on behalf of Drainage District clients. Ms. Walker holds a Bachelor of Science in Civil Engineering from Kansas.

State University and a Master of Civil Engineering with a concentration in water resources from the University of Houston. She has prepared and presented detention routing papers at national and international conferences. Ms. Walker has also developed and presented hydrology and hydraulics continuing education seminars.

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Course Description

Are you ready to increase your expertise in detention routing? Would you like to reduce modeling iterations and improve your ability to interpret results? This seminar will address these issues and more. You will also find out why a technically appropriate detention analysis will ensure that your project does not cause impacts. As a bonus, common detention routing errors will be discussed and strategies to facilitate the development of scope of services for detention projects will also be provided.

This seminar is designed to provide information that can be used for successful completion of detention routing projects. This seminar will focus on a preliminary analysis of data (i.e., inflow hydrographs, tailwater conditions, downstream conditions, etc.) to reduce modeling iterations. Attendees will analyze data, develop strategies, and interpret results for sample detention routing projects. Although case studies will be presented for various software programs, the principles taught in this seminar will be applicable regardless of the selected software.

This seminar will cover the essential concepts that are an integral part of all detention routing projects, including: selection of software, outfall structures, basin geometry data (including interconnected and wet-bottom basins), tailwater conditions (including flood plain issues), inflow and outflow hydrographs, maximum allowable discharges, multiple frequency event design, required detention volume, and detention storage rates. Special attention will be given to analyzing hydrographs, interpreting results, reducing iterations, and troubleshooting analyses. Downstream impacts and issues related to timing will be discussed. Case studies and comparisons will also be presented for projects analyzed using HEC-RAS unsteady flow, PCSWMM, HEC-1, and HEC-HMS.

Detention is an essential storm water management tool used to mitigate the impacts of development or to improve existing flooding conditions within a watershed. The purpose of this seminar is to ensure that your detention facility is designed to operate effectively and avoid impacts to adjacent or downstream properties. As a result of this seminar, you will be able to perform a technically appropriate detention analysis to minimize risk and improve the operation and effectiveness of your clients’ detention facilities. You will also be able to improve detention routing project performance through effective project planning.

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    Learning Objectives

    • Determine when a simplified detention approach is not applicable
    • Learn to select appropriate detention routing software for your project
    • Learn to analyze hydrographs
    • Discover how outfall structure configurations change to mitigate multiple frequency events
    • Understand the impact of tailwater conditions on detention routing results
    • Learn to select appropriate tailwater conditions
    • Understand how timing affects detention routing results
    • Understand the purpose and philosophy of downstream impacts analysis
    • Discover how site location in the flood plain affects detention routing
    • Become familiar with low-cost detention routing software programs
    • Find out how to reduce budget overruns from detention routing projects

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    Seminar Benefits

    • Improve project performance
    • Reduce budget overruns from detention routing projects
    • Gain practical experience analyzing hydrographs, developing detention routing strategies, and interpreting results for sample projects
    • Learn how to select appropriate software for your project
    • Understand the relationship between tailwater and required detention volume
    • Learn to troubleshoot and identify potential problems by analyzing hydrographs
    • Reduce iterations to eliminate impacts
    • Avoid common detention routing mistakes

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    Who Should Attend
    Consulting engineers, governmental agency engineers, hydrologists, and project managers seeking to gain exposure to and understanding of detention routing will benefit from this seminar. This seminar assumes that participants have a basic understanding of hydrology.

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    Summary Outline

    Day One


    • Introduction
    • Essential Detention Routing Concepts
    • Flood Plain Management Issues
    • Model Selections
    • Downstream Impacts
    • Troubleshooting and Reducing Iterations

    Day Two


    • Review
    • Project Planning
    • Scope of Services Strategies
    • Hydrograph Analysis
    • Case Studies
    • Common Detention Routing Errors
    • Course Summary

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