WSPC03885

• File Number: 8200.700
• Description: Colorado River Basin General Publications - Augmentation-Weather Modification
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 2/1/1993
• Author: DOI-BOR
• Title: Validation of Precipitation Management by Seeding Winter Orographic Clouds in the Colorado River Basin - Draft
• Water Supply Pro - Doc Type: Report/Study

0[13176

TABLES

Table

4.1 Instrumentation needed for direct detection experiments , . . . , . . ,
9.1 CREST program costs in thousands of 1993 dollars with no escalation .
9.2 CREST program labor in FTE's (full-time equivalents) . . . . . . . . .

FIGURES

Figure

1 Conceptual model of orographic cloud with SLW zone and AgI seeding plume
2 Grand Mesa experimental area and surrounding terrain . . . . . . . . . . . .
3 Wasatch Plateau experimental area and surrounding terrain .. . . . . . . .
4 Map and cross-sectional view of composite terrain for proposed experimental areas
showing approximate instrument locations . . . . . . . . . . . , . . . . . . . ,
5 Reproduction of figure 2 from Super and Heimbach (1988) showing north-south
mean distributions of IPC and SLW content, with the origin 17 km east ofthe
seeding site, for indicated numbers of passes and altitudes on January 15, 1985
6 The CREST program timeline ... . . . . , . . . . . . . . , . , . . . . . . . , .

APPENDIXES

Appendix

A Colorado River Basin experimental site selection.
1. Overview of experimental area characteristics .
2. Site selection factors . . . . . . , . . . .
2.1 High terrain . . . . . . . . . . . . .
2.2 Aircraft sampling . . . . . . . , . .
2.3 Surface instrumentation and access
2.4 Seeding agents . . . . . . , . . . . . . . . .
2.5 Time and distance for ice particle growth and fallout
2.6 Precipitation measurements .............
3. The ideal experimental barrier . . . , . . . . . . . . . .
4. Procedures for selecting the best experimental sites. . .
4.1 Exclusion of barriers that are too small, too low, or have wilderness areas
4,2 Ratingfactors . . . . . , . . , . . . . . . .
4.2.1 Practical low-level aircraft sampling.
4.2.2 Airspace conflicts. .
4.2,3 Winter road access ..
4.2.4 Snowmobile access ..
4.2.5 Conifer forest cover . .
4.2.6 Along-the-wind extent ..
4.2.7 Proximity to adequate airport
4.2.8 Societal opposition .,....
4.2.9 Shadowing by upwind mountains
4.2.10 Proximity to a town . .
4.2.11 Major axis . . . . . , .
4.2.12 Wilderness area effects
4.2.13 Avalanche danger . . .

5. Selection of best experimental areas
5.1 White River Plateau . .
5.2 Grand Mesa . . . . . .
5.3 Uncompahgre Plateau,
5.4 Boulder Mountain .
5.5 Wasatch Plateau, .
5,6 Chuska Mountains

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