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Explore all PDH CEU CPC CPD and Webinars for Engineers

 

This course accepted in:

 

• Alabama (P.E.)

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Abbreviations:

AOP-Areas of Practice

LAR-Laws & Rules

P.E.-Professional Engineers

 

Explore all PDH CEU CPC CPD and Webinars for Engineers

Design of Roadside Channels with Flexible Linings, Part 2

Course No. EN-3004

Credit: 3 PDH

Course Fee: $86.85 Purchase course

Subject Matter Expert: Mark R. Knarr, P.E.

 

Overview

Roadside channels play an important role in the highway drainage system as the initial conveyance for highway runoff. Roadside channels capture sheet flow from the highway pavement and backslope and convey that runoff to larger channels or culverts within the drainage system. This initial concentration of runoff may create hydraulic conditions that are erosive to the soil that forms the channel boundary. To perform reliably, the roadside channel is often stabilized against erosion by placing a protective lining over the soil.

Channel lining materials fall into two classes: rigid or flexible channel linings. From an erosion control standpoint, the primary difference between rigid and flexible channel linings is their response to changes in channel shape (i.e. the width, depth and alignment). Flexible linings are able to adjust to some change in channel shape while rigid linings cannot. The ability to sustain some change in channel shape improves the overall integrity of the channel lining and reduces maintenance. Movement of a rigid lining at one location can result in a successive failure of the lining. Channel lining materials often experience forces such as frost heave, slumping or swelling of the underlying soils that can change the shape of the lining. These forces can displace rigid linings whereas flexible linings, if properly designed, will retain erosion-control capabilities.

This is a part 2 of a two-part course based on a publication from the U.S. Department of Transportation, Federal Highway Administration, National Highway Institute: Publication No. FHWA-NHI-05-114. Design of Roadside Channels with Flexible Linings. Hydraulic Engineering Circular No. 15, Third Edition. September 2005.

Part 2 covers chapters 5 through 7. The target audience is highway and hydraulic engineers with an interest in controlling stormwater runoff and channel erosion.

To receive PDH credit, the reader must pass a multiple-choice quiz consisting of fifteen (15) questions.

 

Specific Knowledge or Skill Obtained

This course teaches the following specific knowledge and skills:

  • Properties and application of rolled erosion control products (RECPs), including turf-reinforcement mats (TRMs)
  • Design procedures for riprap, cobble, and gravel linings
  • Design procedures for gabion baskets and mattresses
  • Calculation of shear stress and Manning’s roughness for the linings mentioned above

 

Course

Click on the following link to the PDF document to review the course material before taking the quiz for credit.

Design of Roadside Channels with Flexible Linings - Part 2

 

Having trouble downloading the PDF file?

If clicking the link does not bring you to the PDF file, then right-click the link. Click "Save Target As" and save on your desktop. To view the file, double-click the icon on your desktop and return to this page to take the quiz. You may want to bookmark this page for your convenience. If you have questions, Live Support Chat can help.

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To receive PDH credit for this course, you must pass a multiple-choice quiz. Click the button below to Purchase Course and Take Quiz. To take the quiz, your computer must be set to accept cookies. See how to check your cookie settings.

 

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