USGS Multimedia Gallery: (Video)--Special stormwater outfalls (bubblers) used in stream restoration projects to reduce erosive energy, Carriage Hills Outfall, Maryland

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Special stormwater outfalls (bubblers) used in stream restoration projects to reduce erosive energy, Carriage Hills Outfall, Maryland

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[Music playing]

Faith: Joe, we're right up at the top of the

Carriage Hills site here. Say a little bit

about the special design there with how

the stormwater comes out and goes into this drainage.

Joe: Sure, originally this was a headwall

with an exposed pipe that was about

20 feet lower than this and was

actually extended further downstream

as well. So that has all come out

and has been replaced with a bubbler

which is a structure that allows, as

the stormwater is running off of the

landscape, it has to actually well

up out of this structure before it can

flow down the RSC. The idea there is to

reduce the velocity of the water and

the energy that that discharge is

going to have as soon as it enters this restored reach.

One of the biggest mistakes that we

see with stream restoration, in

particular stormwater dominated

stream restoration, is the stream

starts at the invert of the discharging

pipe so there is absolutely no loss

of energy from that pipe. This approach

backwaters that pipe. There is still

plenty of fall so there is no impact

to upstream flooding, but you really

have a tremendous benefit from reduction

in energies at the outfall as a result of

this type of design.

[Music playing]

[End of Audio]

Details

Title: Special stormwater outfalls (bubblers) used in stream restoration projects to reduce erosive energy, Carriage Hills Outfall, Maryland

Description:

Faith Fitzpatrick (U.S. Geological Survey) and Joe Berg (BioHabitats, Inc.) describe bubble up inlet structures that help to reduce erosive energy for stormwater outfalls where they discharge into rehabilitated streams.

Location: Carriage Hills, MD, USA

Date Taken: 3/22/2011

Length: 1:42

Video Producer: Douglas A. Harned , National Water-Quality Assessment Program (NAWQA), USGS, North Carolina Water Science Center, Raleigh, NC

Note: This video has been released into the public domain by the U.S. Geological Survey for use in its entirety. Some videos may contain pieces of copyrighted material. If you wish to use a portion of the video for any purpose, other than for resharing/reposting the video in its entirety, please contact the Video Producer/Videographer listed with this video. Please refer to the USGS Copyright section for how to credit this video.

Additional Video Credits:

Faith Fitzpatrick: Scriptwriter, Narrator, Scientist Consultant

Gerard McMahon: Producer

Douglas Harned: Producer, Video, Editor

Alan Cressler: Video

Luke Myers: Video

Joe Berg (BioHabitats, Inc.)

File Details: