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EWRI/ASCE 39-03

Standard Practice for the Design and Operation of Hail Suppression Projects

This standard provides useful information for implementing operational hail suppression activities, and information on the successful design, conduct, and evaluation of such efforts. Because the effects of seeding clouds for hail suppression on a storm's rainfall are not fully understood, a number of hail suppression concepts have been formulated. The five concepts are included in this book: Beneficial Competition, Early Rainout, Trajectory Lowering, Promotion of Coalescence, and Dynamic Effects. The standard provides the best scientific and technical knowledge currently available on hail suppression to ascribe a process through which hail suppression should be designed, organized, and conducted to optimize the likelihood of success.

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ASCE: American Society of Civil Engineers [ASCE]


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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