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<br />~ ~ <br />~ <br /> <br />, ~ <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />TASK III: SEEDING PROGRAM TARGETING EFFECTIVENESS <br /> <br />The emphasis of the 1986-87 SCPP field experiment is signifi- <br />cantly different from that of previous years, The emphasis is being <br />placed on a demonstration seeding program involving the coordination <br />of several agencies currently involved in ground-based seeding of <br />Sierra Nevada winter clouds, Each of the agencies uses a network of <br />ground-based silver iodide generators designed to target a relatively <br />small area, Because the various target areas are adjacent to each <br />other, cooperation of the agencies may result in overall program <br />improvements consistent with individual agency goals, For example, <br />generators in one of the areas may successfully target and seed <br />clouds in an adjacent area when the generators normally targeting <br />that adjacent area would be ineffective because of incorrect airflow. <br />The net effect of such a cooperative effort may be better seeding over <br />all the target areas summed together and taken as a whole, <br /> <br />The individual ground-based generator networks being used include <br />those operated by the Desert Research Institute (DRI), Sacramento Muni- <br />cipal utilities District (SMUD), and Pacific Gas and Electric Company <br />(PG&E), All of these generators are remotely controlled, These <br />generators will be further supplemented by the Bureau of Reclamation <br />with six manually-controlled generators, Through the coordinated <br />seeding effort this winter, the target area of the SCPP ground-based <br />seeding program has been expanded beyond the traditional American <br />River Basin to include the Truckee-Tahoe and Mokelumne watersheds, <br />Details of the experiment operations and goals are given in the SCPP <br />1986-87 Operations Plan, <br />