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<br />... <br /> <br />Q;'o <br />=0 <br />~o <br /> <br />* <br /> <br />* <br /> <br />..-'" <br /> <br />* <br /> <br />Q) <br />L- <br />a fO <br />::l <br />(T <br />(/) <br />......... .. <br />- <br />Q) <br />Q) <br />I..L.. <br /> <br />Q) <br />L- ... <br />o <br /><( <br />'--" <br /> <br />fO <br /> <br /> <br />00 <br />-10 <br />W..- <br />>- '" <br /> <br />I..L.. <br />I..L.. <br />o <br />Z <br />::J <br />e::: <br /> <br />.. <br /> <br />* <br /> <br />6 8 <br />10 <br /> <br />2 4 6 8 <br />100 <br />DRAINAGE AREA <br /> <br /> <br />6 8 2 <br />1000 <br />(Square Miles) <br /> <br />4 6 <br /> <br />... <br /> <br />Figure 5-3. - Logarithmic plot of runoff yield vs. drainage area for selected gauging stations <br />in the Sevier River Drainage. The power function shown, Runoff Yield - 2055 X <br />(drainage arearO.47, has a correlation coefficient of 0.93. <br /> <br />5.3 Logistics and Other Considerations <br /> <br />Research programs for the Utah/NOAA cooperative program were conducted in the Tushars during several <br />winters in the 1980's. More recent experimentation has been conducted on the Wasatch Plateau. <br />Logistical considerations provided the motivation for moving to the new experimental area. While the <br />Tushars were a good site for SL W investigations by microwave radiometer and some other studies, the <br />ruggedness of the barrier prevented low-level aircraft sampling which is needed for tracking seeded zones. <br />Further, the lack of an all-weather highway to the crestline prevented surface sampling on top of the <br />barrier. <br /> <br />The Wasatch Plateau is relatively flat and in-cloud wrcraft sampling to within 1,000 ft (300 m) of the <br />terrain was proved practical during the early 1991 field season. An all-weather highway goes from <br />Fairview to the top of the plateau at which point the highway branches into two roads (Highways 31 and <br />264), both of which completely cross the plateau. Highway 31 parallels the upwind edge for about 5 <br />miles which proved highly valuable for surrace sampling with truck-mounted instrumentation during the <br />1991 field effort. A mountain observatory was successfully operated throughout several stonn periods <br />next to the Utah DOT (Department of Transportation) snowplow shed on top the plateau. In general, the <br />Wasatch Plateau has proven to be an excellent area for winter field research into cloud seeding. <br /> <br />44 <br />