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Connecting flood management and salmon habitat improvement, Johnson Creek Schweitzer Natural Area, Portland, Oregon

Information presented is factual at the time of creation.
If no transcript and/or closed-caption is available, please notify us.
[Music playing]



Faith: We're here at Schweitzer Natural





Area along Johnson Creek in a





rehabilitated area that was done just a





few years ago. You can still see some





of little trees in front of us that





were planted not so long ago and things.





Janine, this site, we have a pretty





wide flood plain area here. What were





some of the things about flood control





and habitat that were important for





this site, as well as in the Portland area?





Janine: Well, Johnson Creek floods very





regularly and it's been a problem in





Portland for a number of years. And, we





also have concerns about the salmon and





returning salmon. So, this was a really





good opportunity. We had enough space





where we could create both aquatic





habitat and have some flood management.





So, we were able to open this area up,





allow more flooding, some backwater





areas that provide habitat, and really





being able to achieve both goals of





providing flood management, and





increasing and improving aquatic habitat.





Faith: So, instead of having them be





separate, it really was the connection





of the two that make this even that





much more important and more beneficial





in the long run too?





Janine: Absolutely.





Faith: Gardner, you know, what are some





of the specifics in the design of this





site and it's got a lot of innovative





techniques that were used here?





Gardner: Yeah, well, this is, you know





as are the challenges of designing for





urban areas, we have to consider a





whole new suite of things that affect





urban channels. It's very different





than working in a natural system.





So, one of those is the altered





hydrology, we have higher peak flows





and more frequent peak flows than we





had historically. So, as Janine said,





trying to control for that increased





flooding, nuisance flooding that would





occur here, the entire floodplain here





was excavated down about five or six





feet. And, every cubic yard of material





that was put out of here is an extra





cubic yard of flood storage the City





has to decrease downstream flooding.





We also looked at the new hydrology and





the potential future hydrology as a





means to design the channel. And so,





the channel geometry, whether it be the





cross section or the pattern in the





landscape, was designed based on the





current hydrology and the potential





future hydrology.





Faith: So, it had enough space in here





to also get in some side channel





habitat, which is very important for





different species, not only the fish,





but also other species that like





standing water during certain time





periods, or to get that refuge factor





out too in this again, this channel





that's taking flows that it wouldn't





have had before. Higher than what it





would've had prior to urbanization.





Gardner: Exactly.





Faith: The other interesting thing





here, we don't see any rock lined banks





on the outside of the bends, which





usually take a lot of the erosive





flows. So, how are you able to avoid





using that in this case?





Gardner: Yeah, we didn't want to end up





with a channel like we had before that





has the armored banks, that don't have





any ability for lateral adjustment. So,





in this case, we used large logs to





provide bank stability as well as habitat for fish.





We also used what's called an





encapsulated soil lift, which is a





fabric, piece of fabric that's filled





with soil to construct the banks. And





so, those banks will provide interim





stability until the vegetation that's





planted here grows up and can provide





that long-term stability; and





eventually, allow the stream to move





around as streams do naturally.





Faith: So, even though we have the





Johnson Creek that still gets a lot of





flooding, we're able to include some of





the more natural features that are





beneficial both to the in-stream and





the floodplain species.





[Music playing]





[End of Audio]

Details

Title: Connecting flood management and salmon habitat improvement, Johnson Creek Schweitzer Natural Area, Portland, Oregon

Description:

Faith Fitzpatrick (U.S. Geological Survey), Gardner Johnston (Interfluve, Inc.), and Janine Castro (U.S. Fish and Wildlife Service) describe techniques for designing salmon habitat with flood management in Portland's urban streams.

Location: Portland, OR, Johnson Creek Schweitzer Natural Area, USA

Date Taken: 12/13/2010

Length: 4:05

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 McMahon: Video

Gardner Johnston (Interfluve, Inc.)

Janine Castro (U.S. Fish and Wildlife Service)

File Details:

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In: Water collection

Tags: AquaticEcology DouglasHarned EUSE Ecosystems FaithFitzpatrick Habitat Hydrology Interfluve JohnsonCreek NAWQA Oregon Salmon StreamRehabilitation StreamRestoration USFishAndWildlifeService USGS Urbanization WaterQuality WaterResourceManagement

 

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