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File Wood placement in river restoration: fact, fiction, and future direction
Despite decades of research on wood in rivers, the addition of wood as a river restoration technique remains controversial. We reviewed the literature on natural and placed wood to shed light on areas of continued debate. Research on river ecology demonstrates that large woody debris has always been a natural part of most rivers systems. Although a few studies have reported high structural failure rates (>50%) of placed instream wood structures, most studies have shown relatively low failure rates (<20%) and that placed wood remains stable for several years, though long-term evaluations of placed wood are rare. The vast majority of studies on wood placement have reported improvements in physical habitat (e.g., increased pool frequency, cover, habitat diversity). Studies that have not reported improvements in physical habitat often found that watershed processes (e.g., sediment, hydrology, water quality) had not been addressed. Finally, most evaluations of fish response to wood placement have shown positive responses for salmonids, though few studies have looked at long-term watershed-scale responses or studied a wide range of species.
Located in Science and Data / Brook Trout Related Publications
File D source code Mill Creek “Chop and Drop”, WV_FY14 Project
Mostly dead and/or down hemlock trees were utilized to create large woody material inspired habitat structures to increase pool habit, increase thalweg meander length, decrease bankfull width, and introduce overhead fish cover. Cross-vanes, j-hooks, wing-deflectors, toe wood, digger logs, and engineered log jams were constructed. The strategic part of this chop and drop effort was to place and anchor logs to minimize movement in bankfull or high events.
Located in Projects / Project Completion Reports
Wood Additions into the Sheepscot, Narraguagus, Machias Watersheds, Maine
In 2007, Project SHARE and the Department of Marine Resources Bureau of Sea-Run Fisheries and Habitat and private land owners undertook a "chop and drop" large wood addition project. Wood was added to streams with the intent to increase habitat complexity and salmonid survival. This project expands the large wood treatment locations to include the Sheepscot drainage, along with treatment locations on the Machias, East Machias and Narraguagus River drainages. It adds nine additional large wood treatment sites enhancing approximately 4 miles of stream for brook trout.
Located in Projects / 2010 Projects
Wood Additions into the Sheepscot, Narraguagus, Machias Watersheds, Maine
In 2007, Project SHARE and the Department of Marine Resources Bureau of Sea-Run Fisheries and Habitat and private land owners undertook a "chop and drop" large wood addition project. Wood was added to streams with the intent to increase habitat complexity and salmonid survival. This project expands the large wood treatment locations to include the Sheepscot drainage, along with treatment locations on the Machias, East Machias and Narraguagus River drainages. It adds nine additional large wood treatment sites enhancing approximately 4 miles of stream for brook trout.
Located in Funded Projects / EBTJV Projects