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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,

Freese and Nichols is partnering with NCTCOG to offer a one-day, hands-on workshop on the two-dimensional (2D) modeling capabilities within HEC-RAS. The class will take place on October 3, 2018 at the NCTCOG offices in Arlington, TX. Participants will receive 7.5 hours of professional development credit while learning the basics of 2D modeling, including mesh generation, running a 2D model, breach modeling, and RAS mapper.

Registration is $100 and includes a catered lunch. We are pleased to note that registration costs are reduced to $25 for public employees....

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The USACE has released a new version of HEC-RAS that repairs several issues that are present in version 5.0.4 including fixes for 2D manning’s n regions, RAS Mapper stored maps, lateral structure centerlines, lateral structure connections, user defined rating curves inside a SA/ 2D hydraulic connection, advanced time step control, and others. For a comprehensive list of all the repairs that were completed, see the “Problems Repaired” section of the ...

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Several Freese and Nichols offices wore blue to call attention to Texas Flood Awareness Week.

Gov. Greg Abbott set aside May 21-25 as Texas marks the third anniversary of the Memorial Day flooding in 2015 and the events of Hurricane Harvey last year.

He encouraged people to respect the power of water.

“It is crucial that Texans understand and respect the power of water. Planning and preparing are the keys to reducing the loss of life and property,” the proclamation reads.

Read more about the proclamation...

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TagsFlood, TFMA, Hurricane harvey,

This week marks Flood Awareness Week in Texas, made official by a proclamation from Gov. Greg Abbott. The Texas Floodplain Management Association worked with the governor for the proclamation, which you can read in full here.

“As we approach the third anniversary of the tragic flooding of Memorial Day weekend in 2015, and after the catastrophic events of...

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TagsTFMA, Flood, Hurricane harvey,

The Environmental and Water Resources Institute (EWRI) Austin Chapter will hold its 13th annual continuing education workshop June 15. With the theme of The Confluence of Water Resources Disciplines, this year's event will focus on multidiscipline design for water resources projects. Local and national landscape architects, ecologists, civil engineers, and other scientists will present on topics ranging from...

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The Texas Water Development Board’s announcement of the Request for Applications for the Fiscal Year 2018 and 2019 Flood Protection grants has been posted. 

The purpose of this request for applications is to provide assistance to political subdivisions to implement prevention and/or corrective measures for reducing loss of life and property due to flood. In consideration of the significant and deadly flooding events...

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The City of Houston recently updated floodplain regulations after massive flooding and damages occurred throughout Harris County and surrounding areas in recent years. The flood damages have resulted from major rainfall events; Hurricane Harvey (2017), the 2016 Tax Day Flood, and the 2015 Memorial Day Flood. The regulations were updated to better ensure the welfare and safety of the public and to increase the resiliency of communities as they recover and prepare for future rainfall events.

On April 4, the Houston...

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TagsHurricane, Hurricane harvey, floodplain, houston, Regulations,

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