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<br />--. <br /> <br />-.......:.~.--/ <br /> <br />7-2090 (4-81) <br />Bureau ot Reclamation <br /> <br />TECHNICAL REPORT STANDARD TITLE PAGE <br /> <br />1. REPORT NO. II. GOVERNMENT "eelS'ION NO. 3. RECIPIENT'S CATALOG NO. <br />4. TITLE AND SUBTITLE 5. REPORT DATE <br />Southwest Drought Research Program September 30. 1983 <br />6. PERFORMING ORGANIZATION CODE <br />Fi na 1 Report <br />7. AUTHOR(S) 8. PERFORMING ORGANIZATION <br /> REPORT NO. <br />Richard L. Eddy and Patrick A. Hurley <br />9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT NO. <br />Division of Atmospheric Resources Research <br />Bureau of Reclamation 11. CONTRACT OR GRANT NO. <br />POBox 25007 <br />Denver CO 80225 13. TYPE OF REPORT AND PERIO[) <br /> COVERED . <br />12. SPONSORING AGENCY NAME AND ADDRESS <br /> Final Report <br />Same <br /> 14. SPONSORING AGENCY CODE <br /> DIBR <br />IS. SUPPLEMENTARY NOTES <br />16, ABSTRACT The report summari zes the acti viti es and results of the Southwest <br />Drought Research Program, a cooperative research effort between the Bureau <br />of Reclamation and State agencies in Arizona, Colorado, Oklahoma, Texas, and <br />Utah to define and plan how the Southwestern States can best use cloud <br />seeding technology to mitigate droughts. Institutional studi es exami ned <br />issues of authorization for cloud seeding, organization for decisionmaking <br />and communication, and funding for cloud seeding. Technical studies included <br />climatology of drought and nondrought periods, weather modificationpoten- <br />tials, and probable net economic and agricultural benefits and probable <br />social and environmental impacts of cloud seeding for drought mitigation. <br />Results indicate that seedable clouds occur during drought but with less <br />frequency than during nondrought periods; estimated seasonal precipitation <br />increases range from 5 to 20 percent; additional precipitation in drought <br />periods has a beneficial economic effect; weather modification makes its <br />greatest contribution to drought mitigation if it is applied in a long-term <br />program to maintain soil moisture and water storage at near-normal levels; <br />there is no interstate uniformity in laws and procedures governing weather <br />nodification; many State and local governmental bodies are involved, directly <br />Dr indirectly in weather modification and the water produced, which can <br />broaden the funding base and increase understanding and support. <br />17. KEY WORDS AND DOCUMENT ANALYSIS <br />a. DESCRIPTORS-- /*drought/*weather modification/cloud seeding/hydrology/ <br />climatology/water law/economic impact/social impact/crop yield/ <br />Federal-State cooperation/water resources development <br />b. IDENTIFIERS-- /Southwest Drought Research Program/Arizona/Colorado/ <br />Oklahoma/Texas/Utah 0402 <br />c. COSATI Field/Group 04B COWRR: SRIM: <br />18. DISTRIBUTION STATEMENT 19, SECURITY CLASS 21. NO. OF PAGE! <br />Available from the National Technical Information Service, Operations (THIS REPORT) <br /> UNCLASSIFIED 104 <br />Division, 5285 Port Royal Rood, Springfield. Virginia 22/6/. 20. SECURITY CLASS 22. PRICE <br /> (THIS PAGE) <br /> UNCLASSIFIED <br />