Introduction to Stream Restoration - Hydro-Environmental Analysis: Freshwater Environments - page 245

place. Individual logs with attached rootwads are less likely to move than other wood pieces during
a bank-full low. These logs and rootwads often make up “key pieces,” or pieces of LWD deined as
being independently stable within the bank-full channel (i.e., not held or trapped by other material)
and retaining or having the ability to retain other LWD (WFPB 1997). A variety of conigurations
have been used for placing logs, ive of which are illustrated in Figures 8.29 and 8.30.
8.4.17 Lwd r eMoVed
LWD is a necessary component of many healthy stream systems, and human interference has often
led to a decline in LWD. Adding LWD is a common component of restoration projects. However, in
Design typicals:
FIGURE 8.29 Typical strategies for wood placement design from the CRW aquatic restoration LWD project
plan: Rock Creek above the 40 road. (From Bohle, T., CRW Aquatic Restoration LWD Project Plan : Rock
Creek above the 40 Road , Seattle Public Utilities, Cedar River Watershed, 2005.)