Most watershed restoration work in British Columbia
has focused on coastal watersheds which are typically
high in gradient with incised, bedrock- or bouldercontrolled
channels. Both boulders and large woody
debris from species such as cedar and Douglas fir are
the elements which provide hydraulic diversity in the
channel, and thus fish habitat (see Streamline Vol.2 No
2). These elements also function to dissipate stream
energy in high flows. In contrast, interior watersheds
are often lower gradient with less confined channels.
Boulders may be almost absent, and the hydraulic
diversity is provided almost exclusively by wood,
mainly black spruce.
Soto, Christina (editor), Brown, Audrey (contributing editor). 1997. Streamline; Vol. 2; No. 3; Fall 1997. Ministry of Environment, Watershed Restoration Program. Streamline. Vol. 2. No. 3