Weather Modification Potential ? Santa Clara Valley

by Lorance D. Wilson,

Document Type: Proceeding Paper

Part of: Operational Cloud Seeding Projects in the Western United States


Santa Clara County of California has been a water deficient area. The Santa Clara Valley Water District has an obligation to the community and to the other water users in the State to develop and manage local water supplies to optimum levels. Enhancement of rainfall by cloudseeding is one of the tools that has been used in this effort. The ability to use cloudseeding as a tool to increase beneficial yield is limited first by the number of seedable storms and, secondly, by the capacity of the District's groundwater and surface water reservoirs. There are indications from the limited data available that seeding done in storms that are classified as moderate westerly has either no effect, or possibly negative effects. The moderate westerly storm type represents 20% to 30% of the storms that meet the District's seeding criteria.

Subject Headings: Storms | Water supply | Water management | Water resources | Ammonia | Weather modification | Surface water | California | United States

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