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Table 5. Macrohabitot features of Swamp Creek and the east channel of the Big Hole River below the Wisdom Bridge. Standard 

 deviations, where applicable, are in parenthesis. 



Attribute 



Mean 



Swamp Creek (sample section J) 

 Range 



Number in 

 sample 



Mean 



Big Hole River (sample section H) 

 Range 



Number in 

 sample 



Length (miles) 

 Discharge (ft /s) 

 Gradient (%) 

 Sinuosity 



General characteristics of entire sanple section 



1.92 N/A N/A 2.83 



N/A 1.1 - 3.9 N/A N/A 



0.28 N/A N/A 0.27 



1.33 N/A N/A 1.27 



Channel shape 



Meanders in a single channel. New channel 

 formation has occurred in one area at the 

 isthmus of a meander loop. 



Primarily meanders in a single channel, 

 although double channel areas occur fre- 

 quently, typically resulting from sed- 

 iment deposition or meander loop cutoffs. 



Bank condition and 

 vegetation 



Grasses & sedges predominate throughout 

 the section. Shrubs are sparse throughout 

 but are densest near upper end. Banks along 

 outside bends typically sloughing. Cattle 

 grazing heavy in middle portions of section. 



Grasses & sedges predominate throughout 

 the section. Shrubs sparse throughout, 

 densest in the lower third. Banks along 

 outside bends typically sloughing. Cattle 

 grazing heavy in upper half of section. 



Characteristics relating to the capture sites 



Bank height (ft) 



Wetted stream width (ft) 



Channel width (ft) 



Habitat type at capture site 

 (X of each type): 



Rapid 



Low-gradient riffle 



Run 



Slow Run 



Pool 



Distance from capture site: 



Base of upstream riffle (ft)^ 



Top of upstream riffle (ft) 



Top of downstream riffle (ft) 110.9 (114.1) 



Pool length (ft)"* 142. 8 (151.8) 



18.5 



55.6 



7.4 



18.5 



27.2 (39.7) 

 66.9 (48.9) 



Riffle length (ft) 



25.7 (22.2) 



-14.4 - 137.1 

 4.9 - 161.0 

 8.9 - 601.9 



17.6 - 694.4 



2.5 - 101.4 



27 

 27 

 27 



20 



20 



1.6 

 9.4 



73.4 

 3.1 



12.5 



Sinuosity = distance measured along midpoint of chnnnel/downval ley length of channel x 100. 



Criteria for habitat types are as follows: rapid -- a steep, shallow area where the water surface is rough and broken by 

 Whitewater; low-gradient riffle -- shallow area where water surface is rough, but not broken by Whitewater; run -- deeper 

 than a riffle, with an obvious current, and a water surface that is not as rough as a riffle; slow run ■- slow version of a 

 run; pool --as deep or deeper than a run with a smooth water surface and a current that is detectable only upon close 

 inspection. 



Negative distances indicate that the fish was in the riffle. 



For these calculations, "riffle" is includes those areas defined as "riffle" or "rapid" in footnote "2" above, while "pool" 

 includes all other areas. Size of pools and riffles was determined by using distances from capture sites to upstream and 

 downstream riffles. 



