Laserfiche WebLink
<br />.... <br /> <br />5.2.1 Western Divisio~{Nor!her~_Partl <br /> <br />The Western Division of Utah is over 300 miles long, <br />wi-:h different charac'teris'tics at the 'two ends. For 'that <br />reason, the division was split into northern and southern <br />parts and a design was developed for each. A design was no't <br />considered for the very dry, ~ilitary-dominated central part <br />of the division. <br /> <br />For the northern part, the area north and east of Lucin <br />was considered. This area includes upland rangeland (the <br />Raft River ~ountains and Grouse Creek Mountains), se~idesert <br />rangeland, a~d some irrigated cropland. The population is <br />very sparse. <br /> <br />Modeling results are given in Table 5.3. For ground-based <br />seeding near Lucin, the seeding pl~~€ in the absence of convection <br />failed to rise to colder temperatures (where more artificial <br />nuclei can freeze liquid cloud drops) until it was over the <br />crest of the Raft River Mountains. Results from ground-based <br />seeding improved somewhat with convection. However,blowover <br />of seeding effects into Idaho also occurred. ~foving the seeding <br />unit nearer the P~ft River ~ountains actually worsened seeding <br />effects since vertical plume dispersion was limited by the <br />shorter time period in reaching the mountain. These modeling <br />results are representative of the problems in ground-based <br />seeding of a small, narrow Mountain range like the Raft River <br />~ountains. Orographic uplift of the seeding pluT.e is limited, <br />and seeding effects occur to the lee of the crest, where leeside <br />evaporation decreases the effects. <br /> <br />Seeding effects improved considerably with simulated <br />aerial seeding. Releasing the artificial nuclei within the <br />5-16 <br /> <br />. <br />