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<br />CONTENTS - Continued
<br />
<br />Page
<br />
<br />7.3 Physical obselVations .............................,.........,..,. 54
<br />7.4 Demonstration program cost and other options. . , . . . . . . . . . . . . . . . . . . . . . . . . 55
<br />
<br />8. Estimated benefit-cost ratio of cloud seeding ,........,.................,.... 57
<br />8.1 Modelled augmentation of runoff . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
<br />8.2 Estimated value of the additional streamflow. . . . . . . . . . . . ... . . . . . . . . . . . . . . 58
<br />8.3 Estimated costs of an operational seeding program . . . . . . . . . . . . . . . . . . . . . . . . 60
<br />8.4 Estimated range of benefit-cost ratios ..,.............................. 61
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<br />9, Summary.............,.........,......,...........,......,........", 63
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<br />10. Bibliography........................,.......,.........,........,...... 65
<br />
<br />TABLES
<br />
<br />Table
<br />
<br />3.1 Storm total SL W flux and precipitation for three winters. , , . . . . . . . . . . . . . . . . . 12
<br />3.2 Summary of SL W flux each season compared with mean annual runoff
<br />
<br />from the Beaver River ., , . . . . . . . . . . . , . . . . . . . . . . , , . . . . . . . . , . . . . . 17
<br />
<br />8,1 Percentage increases in monthly runoff due to adjusting the snow correction
<br />factor for the Sevier River at Hatch (1951-1971) . . . . . . . . . . . . . . . . . . . . . . . 58
<br />8.2 Additional annual costs of an operational program using high-output, remote-
<br />controlled AgI generators with 2-mile separation . . . . , . . . . . . . . . . . . . . . . . . 60
<br />
<br />FIGURES
<br />
<br />Figure
<br />
<br />1-1 Map of the Sevier River Basin showing streams and county boundaries .....,.,. 2
<br />3-1 Storm total SL W flux vs. total precipitation (water equivalent) based
<br />on 1985, 1987, and 1989 data from the Tushar Mountains .... . . . . . . . . . . . . 15
<br />3-2 Storm total SLW flux vs. total precipitation based on 1987 data from
<br />
<br />the Mogollon Rim . . . . . , . . . . . . . . . , . . . . . . . . . . . . . . . . , . . . . . . . . . . . 16
<br />
<br />3-3 Average monthly precipitation amounts (inches) at the Blowhard
<br />
<br />Mountain radar site .........,....,..........,.............,.., 22
<br />
<br />3-4 Average monthly snowfall depths (inches) at the Blowhard Mountain Radar site . , '. 22
<br />3-5 Average number of days per month with precipitation of 0.1 in or greater
<br />at the Blowhard Mountain radar site ....,.................,..,..... 23
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