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<br />Table 3.1 Resource Matrix Comparing No Action and Proposed Action Alternatives. <br /> <br /> Proposed Action <br /> No Action <br />Resource Alternative ------- <br /> Experimental Dam Releases Mechanical <br /> Removal <br /> 8,000 cfs 6.500-9,000 cfs 5,000-20,000 31,000- 42,000-45,000 <br /> steady flow fluctuating flow cfs fluctuating 33,000 cfs cfs high flow <br /> flow high flow <br /> - <br /> ------------ -------" ------ Higher than ------- <br />Water No change to lower average Smaller daily Greater daily Higher than No No effect <br /> monthly or daily releases fluctuations fluctuations No Action for Action in <br /> annual than No Action compared to than No Action 2 days July- January for 2 Y, <br /> volumes Oct-Nov, but No Action Oct- Jan-Mar; Dec days <br /> higher Jan; similar slightly lower <br /> minimum minimum minimum <br /> releases releases releases <br />Sediment Tributary Estimated 90% Estimated 80% Potential to Greater More likely to No effect. <br /> inputs not of Paria River of Paria River erode newly potential to rebuild <br /> conserved: inputs inputs created rebuild lower sandbars and <br /> continued conserved in conserved in beaches, but elevation beaches than <br /> erosion of Upper Marble Upper Marble less than sandbars in 1996, with <br /> existing Canyon Canyon following 1996 than in 1997 more diverse <br /> deposits BHBF test; and 2000 as grain size; <br /> greater sediment downstream <br /> downstream concentralicn sediment <br /> sediment s would be export would <br /> transport than higher be less than in <br /> No Action 1996 <br />Recreation: Trout Increased No effect Moderately Negligible Negligible No effect <br />Fishing in numbers numbers of beneficial; effect effect because <br />Glen increase, size trout reduction in because of ofshor! <br />Canyon & catch rate angler catch short duration duration <br /> decrease rate; increase <br /> in average size <br /> (to 16 inches); <br /> occasional trout <br /> stranding <br /> <br /> N <br /> OJ <br /> 0 <br /> :r <br /> tll <br /> -0 <br /> - <br /> CD <br /> ~ <br /> W <br /> 0 <br /> )> <br /> 1if <br /> (') <br /> CD <br /> a. <br /> m <br /> :J <br /> ,;;. <br /> ~ <br /> 0 <br /> :J <br /> 3 <br /> CD <br /> ~ <br /> tll <br /> :J <br /> a. <br /> m <br /> :J <br /> < <br /> =;. <br /> 0 <br /> ,:J <br /> 3 <br /> CD <br /> :J <br />, 1[ <br /> 0 <br /> 0 <br /> :J -",-. <br /> '" <br /> CD <br /> .Q <br /> C <br /> (!) <br /> :J <br /> (') <br /> (!) <br /> '" <br />