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TABLE 7-28 • <br />Premini ng Geomorphic Parameters of Basins <br />to be Affected by Mining <br />1 <br />Parameter 005 Gulch 006 Gulch <br />Watershed area (miz) 1.30 1.87 <br />Longest stream channel (mi ~) 1.98 3.13 <br />Elevation change of longest channel (ft) 1025 1125 <br />Sinuosity of longest channel lft/ft) 1.05 1.10 <br />Circularity ratio (mi/mi) .559 ,493 <br />Drainage density (mi/min) 7.92 7.32 <br />Constance of channel maintenance (mi'/mi) .133 .136 <br />Stream order 2 4 <br />Mean basin elevation= (ft) 7274 7461 <br />Average watershed slopes (ft/ft) .221 .237 <br />Main stream channel gradient (ft/f t) .0980 .0681 • <br />Drainage pattern ~ Parallel and Dendritic <br />1 <br />Parameters and their significance are discussed in Brakensiek et al. (1979) and Mori sawa <br />(1968), <br />2 <br />Methodology used to determine mean basin elevati on presented in Kircher et al. (1985). <br />3 <br />Methodology used to determine average watershed slope presented in Williams and Berndt <br />(1976). <br /> <br />90 <br />