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<br />winter of 1981-82 by the Atmospheric Science Department of Colorado <br />State University sound promising. The delivery capability for seeding <br />materials and the potential downwind effects, both positive and <br />negative, are important to the state and a subject of frequent <br />interest to citizens. <br /> <br />o Seeding results on multiple mountain barriers. Under selective <br />mountain barrier seeding situations is it likely that artificially <br />increased precipitation might alter the distribution of snowfall in a <br />river basin but not affect the total runoff within that basin? The <br />answer to this question will be of particular importance to state <br />policy makers concerned with long range water planning in the Colorado <br />River Basin. <br /> <br />o Long term effects of weather modification agents on the ecosystem. <br />Additional environmental studies of effects of seeding agents are <br />important to state citizens and policy makers. <br /> <br />B. Human Dimensions of Natural Snowfall Study Needs <br /> <br />As research on the physical processes of winter cloud seeding proceeds it 1S <br />important to further public knowledge of the effects of natural snowfall. <br />Understanding costs and benefits of natural snowfall 1S pertinent to <br />understanding costs and benefits of augmented snowfall. While the weather <br />modification literature frequently mentions the need to know more about the human <br />dimensions of social and economic aspects of weather modification, this area has <br />largely been neglected. This is emphasized in the 1978 Report to the Secretary <br />of Commerce from the Weather Modification Advisory Board. <br /> <br />Study of the societal aspects of weather modification <br />has been grossly underfinanced and essentially <br />.unattended. (p. 123)1 <br /> <br />1 See References for citation. <br /> <br />6 <br />