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<br />.' <br /> <br />5.2.2 <br /> <br />West~!:n Div!sion (Souther!! Par!l <br /> <br />The southern part of the Western Division extends south <br />and west of Delta. ~uch or this area is desert rangeland. <br />However, the Indian Cree~ Range and Wah Wah ~ountains provide <br />upland rangeland i~ the southwest. There are irrigated croplands <br />near Delta, ~ilford, and ~odena. As in the nort~ern part <br />of the division, population density is very low. <br /> <br />The modeling loca~ion, shown earlier in Figure 5.2, is <br />from Ursine, ~evada to the 7ushar ~ountains east of ~ilford. <br />This location allows for simulation of possible orographic <br />effects from the Indian ?eak Range and for si~ulation of seeding <br />effects over ~he flatter terrain sou~hwest of Milford. <br /> <br />Modeling resul~s are given in ~able 5.5. Ground-based <br />seeding fro~ Ursine had no effect under stable conditions. <br />Plame dispersion in ~he vertical was insufficient. Seeding <br />effects improved considerably with convection and occurred <br />primarily over the flat terrain southwest of ~ilford. With <br />lighter winds than those used in the model (10 to 15 m/s in <br />the lower levels), 'the effects would be shifted upwind. Good <br />increases also occurred with si~ulated aerial seeding along <br />Vi ctor Air- ways 293. However, the effects were located along <br />the far eastern side of ~he division. Aerial operations further <br />southwest in order to shift effects upwind would not be possible <br />due to a large restric~ed area in Southern Nevada. <br /> <br />7hese results suggest that a network of ground-based <br />seeding units be used for standby seeding operations. Seeding <br />should only be performed under convective conditions. Possible <br />seeding sites are shown i~ Figure 5.6. The base of operations <br />could be Cedar Ci ty. Recommended personnel include a meteorologist <br />5-21 <br />