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Association of State Flood Plain Managers Association of State Flood Plain Managers
Association of State Flood Plain Managers
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USGS Tools Part I: Flood-Frequency Analysis Overview (Intermediate Level)

Monday 5/16/2011, 8:00AM - 12:00PM

Fee $40, 4 CECs

Description
Want to know where the 1-percent flood comes from? Flood-frequency analysis of USGS peak streamflow records provides the essential hydrologic input for floodplain mapping. This two-part workshop will provide an overview and refresher on flood-frequency analysis of streamflow records (Part I) and an overview of software used to estimate flood-frequencies at ungaged sites (Part II). Participants may attend both of these segments as one workshop, but you must so indicate on your registration form to avoid a charge for both. They may also be attended individually.

Objectives
understand flood-frequency concepts, the value of longterm and historic flood records, and how flood data are screened and treated for ouliers and why. Be familiar with proposed changes and updates to Bulletin 17B.

Topics

  • Flood-Frequency Concepts
  • Bulletin 17B Computations
  • USGS PeakFQ
  • Special Problems and Considerations in Frequency Analysis
  • Multiple Low-outliers -Orestimba Creek, CA
  • Historic Information -Boxelder Creek, SD
  • Non-Stationarity -Red River of the North, ND
  • Panel Discussion: What is the future for Bulletin 17B?

Outline
We plan a series of short lectures by various presenters on current practices and and techniques followed by a panel discussion about the need for updates and how we can begin to address questions about computing flood-frequencies in the context of landuse and climate change. The panelists will be drawn from a number of agencies and academia.

  • 60% Lecture
  • 40% Discussion 

Agenda

  • 0-1.5 Hours
    • Flood-Frequency Concepts--Robert Mason (USGS)
    • Bulletin 17B Computations--Will Thomas (Michael Baker)
    • USGS PeakFQ ---Flynn (USGS)
    • Break (.25 hours)
  • 1.75-2.75 hours Special Problems and Considerations in Frequency Analysis-- Tim Cohn (USGS)
    • Multiple Low-outliers -Orestimba Creek, CA
    • Historic Information -Boxelder Creek, SD
    • Non-Stationarity -Red River of the North, ND
  • 2.75-3.75 hours Panel Discussion: What is the future for Bulletin 17B? Thomas, Cohn, John England (US BOR), Nancy Steinberger (FEMA), Jery Stedinger, Cornell University)

Instructors:
Robert Mason, PE Hydrologist, USGS
Robert Mason is a hydrologist and civil engineer with the U.S. Geological Survey where he coordinates development and implementation of statistical and hydraulic models and provides technical support to USGS surface-water hydrologists nationwide.

Tim Cohn, PhD Hydrologist, USGS
Tim Cohn, currently a hydrologist in the USGS Office of Surface Water, has co-authored more than 25 papers on methods for estimating flood risk and other topics. He previously served as USGS Science Advisor for Hazards, where he helped coordinate USGS programs that apply science to the challenge of reducing the Nation's vulnerability to natural hazards. As the American Geophysical Union's 1995-96 AAAS Congressional Science Fellow, he served as legislative assistant to Senator Bill Bradley on issues related to energy and the environment. Tim holds M.S. and Ph.D. degrees from Cornell University and a B.A. from Swarthmore College.




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