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Archive for the ‘large wood debris’ Category

Simon Dixon writes an excellent piece (admittedly published January 2014) that summarizes some of his PhD efforts in England that looked at how adding woody debris to a river in smaller catchments might effect flood conditions downstream in a more urbanized setting.  The results seem to suggest that the answer is a classic ‘it depends’.  On the encouraging side, it appears as though allowing floodwaters to innundate floodplain forests can help.   To quote “the real take home message is the restoration of floodplain forests to entire “subcatchments” of the main catchment always decreases flood peak height after 25 years of growth, and can have dramatic effects.”  Three cheers for forested floodplain restoration and connectivity!

The piece is an excellent read as are the other posts in The River Management Blog.

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The Washington Department of Fish & Wildlife has just released a draft of its document titled “Stream Habitat Restoration Guidelines 2012” here.  It’s an  831 page document that I’ve only skimmed so far.  It does look rather thorough and as with many other documents covering the subject in general, it advocates for a watershed analysis and perspective on impacts throughout the landscape that can have an effect on physical channel habitat.  The document has 5 chapters covering some broad restoration themes, it then goes into 13 specific restoration techniques ranging from floodplain and channel manipulation, to large woody debris management and beaver management.  Finally, the document provides 10 appendices which appear to be introductions to academic courses such as fluvial geomorphology, sediment transport and hydrology.  Overall, it looks like an excellent reference to add to one’s  library on the topic of stream restoration.

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The Bureau of Reclamation has posted presentations to a LWD conference held in Seattle, WA earlier this year here:

http://www.usbr.gov/research/science-and-tech/conference/large-wood/index.html

Scroll to the bottom to see the list of presentations that have been converted to pdf’s.

HT: Doug Shields

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