WMOD00285 ‎(2)‎

• Title: Feasibility Study of Wintertime Cloud Seeding to Augment Arizona Water Supplies
• Date: 1/1/1987
• State: AZ
• Weather Modification - Doc Type: Report

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1. Int roduct ion

The Ari zona DWR (Department of Water Resources) is requi red by Ari zona
Revised Statutes S 45-0565.A.4 to include a program for augmentation of
water resources in management plans for a successive management period.
The DWR has recognized that a potential source of additional water is
enhanced snowpack from wi ntertime cloud sel:!di ng in Ari zona mountai n ranges.
The Bureau of Reclamation, under Project Skywater, has the overall goal of
devel opi ng an effecti ve weather modifi cati on technology to hel p meet
western water resources needs. Fulfillment of this goal includes con-
ducting cloud seeding feasibility and demonstration projects to augment
precipitation in geographical areas requiring additional water supplies.

A cooperative effort between the DWR and the Bureau of Reclamation has
investigated wintertime cloud seeding over Arizona mountains to assess
impacts to four AMA's (Active Management Areas): Phoenix, Tucson, Pinal
and Prescott. Covered in this report are the results of a literature
search on weather modification (chapter 2), an identification of weather
modification techniques (chapter 3), a study of applicability of weather
modification for benefit to Arizona AMA's (chapter 4), a limited environ-
mental study (chapter 5), a limited legal-issues study (chapter 6), an
estimation of streamflow yields by cloud seeding (chapter 7), an estimation
of economic benefits (chapter 8) and the development of options and recom-
mendations for future cloud seeding efforts in Arizona (chapter 9).

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