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points first is that range and variation between the clusters are known. For example, over half the clusters sampled had poor pool habitat availability indicating this habitat is not evenly distributed. Table 6. Inflection points for GW A and WUA for all clusters sampled above Cross Mountain. Inflection point Inflection point Inflection point Gross area Daytime CS habitat Nighttime CS habitat Cluster ( cfs ) Sq. ft. (cfs) % Sq. ft. (cfs) % Sq. ft. 59.8 80 129488 125 2 3062 100 30 40123 62.8 60 149281 80 4 5488 100 38 60177 69.8 60 123715 200 4 6981 150 39 59733 73.3 80 117706 60 26 28264 150 28 36314 74.5 150 195706 60 15 21583 40 25 31757 76.3 100 248613 60 7 14917 60 33 67644 77.8 60 171555 100 29 51164 40 46 75694 94.0 60 163296 100 6 9647 100 47 80882 104.5 40 190169 100 18 35564 80 30 59245 115.5 150 217276 100 8 11220 150 28 60228 117.5 60 189526 40 1 2091 40 25 45353 119 150 213449 200 1 3038 40 13 18831 121.5 80 187621 80 18 33378 60 33 60905 124.0 125 179847 150 27 49764 80 50 78825 Mean 89.6 - 103.9 - - 85.0 - - DISCUSSION Currently, there is no reliable method capable of predicting the response of stream biota to changes in flow regime (Allen 1995). Lacking methods that have been rigorously tested against biological variables, the hydraulic model was used to examine channel morphology. Stream channel morphology is a function of streamflow duration and magnitude, size and type of transported sediment, and the bed and bank materials of the channel, valley morphology, and basin relief Stream width can be modified by several factors such as, direct channel disturbance i.e. channelization, changes in riparian vegetation that alter bank resistance and susceptibility to erosion, changes in stream flow regime, and changes in sediment regime (Rosgen 1996). The channel dimensions 28