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<br />oon953 <br /> <br />i <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />'/-;~Jii;~~,:~ <br />l!':_. y.;.~ ,~ <br />ttl{i~~~ <br />~~~-~~ <br /> <br /> <br />Development Considerations <br /> <br />There are four broad functional considerations invo;lved in a tech- <br />nology for modifying precipitation: (1) deciding whether or not pre- <br /> <br />cipitation modification techniques should be employed (2) recognizing <br /> <br /> <br />suitable opportunities for their employment (3) providing the neces- <br /> <br /> <br />sary treatment of the atmosphere, and (4) monitoring and evaluating <br /> <br />the results. The realistic and practical nature of the capability to <br />enhance precipitation is implied in the functional considerations.. <br /> <br />Social-cultural impacts and effects on natural species and regimes <br /> <br /> <br />must be considered in developing the technology. <br /> <br />Regional Consideration <br /> <br />There are regional differences in the requirement for additional <br /> <br />water, its value, and the nature and timing of productive opportun- <br /> <br /> <br />ities to apply cloud seeding or other modification techniques. Win- <br /> <br />ter is the important precipitation season in much of the mountainous <br /> <br />West, spring and summer are important in the Great Plains, and all <br /> <br />months are significant contributers in New England and other sections <br />'. '-. <br /> <br />of the East, <br /> <br />Across the Nation there are differences in storm types, <br /> <br />~:~"'''' <br /> <br /> <br />in lifting mechanisms, and in natural nuclei. <br /> <br />This complex of differ- <br /> <br />ing needs, values, opportunities and seasons argues for a regional <br /> <br />approach to the national problem. <br /> <br />If reasonably homogenous regions <br /> <br />can be delineated, studies and development efforts can be focused <br /> <br />for maximum effectiveness, <br /> <br />Central coordination to minimize dupli- <br /> <br />cation of effort would be a necessary part of a regional approach to <br />developing an atmospheric water resource technology; <br /> <br />12 <br /> <br />lIi...1f..~~l:~~~l~~ <br />