WWRC 85-02
Assessment of Flushing Flow Recommendations in a Steep, Rough, Regulated Tributary
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.
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