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We are excited to be presenting at the Oklahoma Floodplain Managers Association Annual Conference Sept. 16-19 at the Stoney Creek Hotel and Conference Center in Broken Arrow, Oklahoma. We look forward to connecting with you at one of our three presentations:

Title: Harness the Power of 2D for Road Design
Time: Monday, September 17 1:00-2:30 PM (Salon A)
Presenters: Justin Oswald, PE, CFM
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TagsHEC-RAS, stormwater management, asset management, roadway design, 2-D Modeling, storm drainage improvements,

Freese and Nichols is offering interactive workshops for the Hydrologic Engineering Center-River Analysis System, better known as HEC-RAS. This free software, developed by the U.S. Army Corps of Engineers, includes 2D flow modeling capabilities that can depict flow patterns more accurately than one-dimensional models. HEC-RAS 2D equips dam owners and...

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TagsHEC-RAS, modeling, 2-D Modeling,

We are pleased to welcome our new Stormwater hires, Ed Dickson and Jim Keith, who will bolster our ability to support a variety of municipalities, water districts and complex projects.

Ed, who is based in our new Charlotte office, is a water resources and stormwater engineer and nationally recognized for his floodplain mapping work. His specialization is in watershed-based H&H analysis, mapping and reviews...

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TagsStormwater, dallas, north carolina, FEMA, HEC-RAS, HEC-HMS,

We’re proud to be presenting at the TFMA Fall Technical Summit. We look forward to connecting with you. 

Title: Hands-On HEC-RAS 2D (For Intermediate 1D Users)
Time: 8 a.m. – 5 p.m. Tuesday, Aug. 28
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TagsTFMA, Stormwater, HEC-RAS, dam safety, Hurricane harvey,

A typical detention pond design will include an overflow weir for safely passing high inflows downstream. In many cases, an engineer will design the weir using a one-dimensional (1D) hydraulic model with “textbook” weir coefficients.

These commonly-accepted values are based on lab tests and measurements, and are limited by certain assumptions (for example, flow is assumed to be uniformly distributed across the weir). The following case study illustrates how 3D modeling software can provide...

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Tags3D modeling, Stormwater, HEC-RAS, detention pond,

The USACE has released a new version of HEC-RAS that has several new features.

Those features include enhancement to storage area/ 2D hydraulic connections, variable time steps, internal boundary conditions lines for 2D areas, new velocity term for 2D flow area boundary conditions and RAS Mapper editing tools. 

Other minor enhancements were added and repairs were made as well.

For a more detailed description of the changes...

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TagsHEC-RAS, USACE,

Freese and Nichols will attend and present at the Texas Floodplain Management Association (TFMA) conference on March 6-9 at Horseshoe Bay Resort. We look forward to seeing you at our booth (No. 210) or at one of our presentations or workshop.

Title: Introduction to HEC-RAS 2D Workshop 
8 a.m. – 5 p.m. ...

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TagsTFMA, 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,

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