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The effect of natural flood management in-stream wood placements on fish movement in Scotland

Wood placement flooded; Cover photograph courtesy of: The James Hutton Institute

This report provides a review and analysis of information on the passage by fish at wooden obstacles (woody placements), used for flood management, in Scotland. The report covers a series of placement types ranging from those permanently in the wetted stream channel, to those placed on side-bars which are wetted for a low proportion of the year.  With an absence of ground tested data, theoretical information from river-barrier assessment tools combined with the output from an expert panel, provide guidelines for good practice for the use of flood management woody placements in small streams, which minimise the impact on fish passage.