Environmental Engineering Reference
In-Depth Information
FIGURE 4.11
Fish ladder at Rocky Reach Dam on the Columbia River in Washington.
f
Low
a
LteratIons
, f
Low
f
LuCtuatIons
,
and
r
eguLated
and
u
nreguLated
r
Ivers
and
s
aLmonIds
*
Hydropower plants can, to varying capacities, change instream flow patterns in riv-
ers below the dams and powerhouses. These changes can be classified into two cat-
egories:
flow alterations
and
low luctuations
. Flow alterations are changes in flow
*
Adapted from Hunter, M.A.,
Hydropower Flow Fluctuations and Salmonids: A Review of the
Biological Effects, Mechanical Causes, and Options for Mitigation
, Washington Department of
Fisheries, Olympia, 1992.
