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John Rutledge, Patrick Miles, and Garrett Johnston, all professional engineers with Freese and Nichols, conducted a three-day HEC-RAS 2D workshop in Oklahoma City, hosted by the Oklahoma Water Resources Board (OWRB) Dam Safety program. Discussion and activities focused on applications and benefits of HEC-RAS 2D modeling; RAS Mapper and terrain preparation; running 1D and 2D models including dam, levee, and breach modeling; viewing results with RAS Mapper; troubleshooting and model review. The workshop included a number of hands-on modeling...

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TagsOklahoma Water Resources Board, HEC-RAS,

John Rutledge, Patrick Miles, and Garrett Johnston, all professional engineers with Freese and Nichols, conducted a three-day HEC-RAS 2D workshop in Oklahoma City, hosted by the Oklahoma Water Resources Board (OWRB) Dam Safety program. Discussion and activities focused on applications and benefits of HEC-RAS 2D modeling; RAS Mapper and terrain preparation; running 1D and 2D models including dam, levee, and breach modeling; viewing results with RAS Mapper; troubleshooting and model review. The workshop included a number of hands-on modeling...

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TagsOklahoma Water Resources Board, HEC-RAS,

Freese and Nichols will attend and present at the Texas Floodplain Management Association (TFMA) Spring conference April 25-28 in Dallas. Stop by our booth, #208, or catch one of our presentations or workshop:

Wednesday, April 26

8 a.m. – noon - Low Impact Development (LID) and Design Workshop
Kelly Dillard*; Matt Hollon of the City of Austin; Patrick Haigh of the City of Dallas, Bryan Dick*; Stephanie Coffman*; Karen Bishop of the San Antonio River Authority

Thursday, April 27 ...

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TagsTFMA,

The USACE has released a new version of HEC-RAS that supersedes versions 5.0.1 and 5.0.2 (which was withdrawn due to major bugs). The new version fixes several bugs and includes new and improved features like culvert inlet/ outlet control, using 2D flow equations at lateral structures, flow and volume time series output for profile lines in RAS Mapper, and profile line point and tick marks. For more info on the new version and to download the model, check out the links below.

Release Notes:...

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TagsHEC-RAS,

This article is the first in our blog series on HEC-RAS modeling. Be sure to check back for subsequent series articles.

Background

The Federal Emergency Management Agency (FEMA) regulates development within the 100-year floodplain by administrating the National Flood Insurance Program (NFIP). Communities that participate in the NFIP must prevent excessive development within the floodplain that could cause increases in potential flood damage. FEMA also does not allow development to occur within the floodway, which has a maximum allowable surcharge of...

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TagsHEC-RAS, Floodway, floodplain, 100-year flood, FEMA,

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