WWRC 86-05y
Flushing Flow Research
Abstract
The effectiveness of flushing flow recommendations
for the North Fork of the Little Snake River was
assessed in response to sediment deposition which
occurred in 1984 as a result of construction activity
in the watershed. Results indicate that three spring
runoff flushes meeting or exceeding the magnitude
and duration of the recommended flushing flow were
somewhat successful in reducing the quantity of
deposited material. Quality of deposited material, in
terms of trout habitat, was very low but showed an
improving trend in response to the runoff hydrograph
in stream areas most severely effected. Methodology
for quantitatively assessing the effectiveness of
flushing flows is presented as well as mitigative
recommendations for 1986.
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