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<br />The northern boundary of Grid 3 as set up for the Colorado WDMP was
<br />along the ColoradolWyorning border; the western boundary was positioned west
<br />of Grand Mesa and significant high terrain in west-central Colorado; the southern
<br />boundary was along the Gunnison and Arkansas Rivers; and the eastern
<br />boundary was well east of the foothills. These selected boundaries included all
<br />of the central Colorado Rockies (including Pikes Peak) while minimized crossing
<br />high mountain ranges. which was optimal for the model.
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<br />ESRl's ArcView 3-D Analyst was used by Ross Williams (GIS support
<br />contracted by CWCS) to create a 3-D model of the region immediately surrounding
<br />and including the DW Program's cloud-seeding target area. There remain
<br />questions among water managers and researchers about locating cloud-seeding
<br />generators in high mountain valleys and the effect of temperature inversions on the
<br />effectiveness of those particular stations. This 3-D model should help to display
<br />those generators that may not be as effective for seeding orographic clouds over
<br />the target area.
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<br />Three 3-D GIS topographic perspective views representing selected cloud-
<br />seeding wind regimes were prepared and included in this report. Figure 2.6 is a
<br />perspective view of the target area from the SW looking toward the NE. This is a
<br />good view for the S. SSW. SW to WSW wind regimes. Figure 2.7 is a perspective
<br />view of the target area from the W looking toward the E. This is a good view for
<br />WSW. W to WNW wind regimes. Figure 2.8 is a perspective view of the target
<br />area from the NW looking toward the SE. This is a good view for WNW. NW. NNW
<br />to N wind regimes. These three figures include the DW Program's target area
<br />boundary and the locations of WWC cloud-seeding generator sites.
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<br />Figure 2.6. SW to NE Topographic Perspective View
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