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<br />~ <br /> <br />, <br />\ <br /> <br />As ~~e design for each division is developed, ~he increment <br /> <br />that see~s mos~ likely achievable will be given. <br /> <br />5.2 Standby Seeding Programs For Each Climatological Division <br /> <br />In ~he following sub-sec~ions, a design for standby cloud <br />seeding progra~s in each climatological division will be pre- <br /> <br />se~ted. <br /> <br />The designs were based on previous experience in <br /> <br />a division, prac~ical considerations, and modeling guidance. <br /> <br />Eigh~ di:ferent areas, shown ~n Fig. 5.5, were modeled. <br />The arrows show the downwind trajectory (generally 180 km), <br />~hile the do~s show ~he morieled seeding locations. <br /> <br />No ~ode~lng was done for the Nort~ Central and Dixie <br /> <br />Divisions. <br /> <br />I~ was felt that the design used in the current <br /> <br />seeding p~ogra~ in Southern Utah could be used in those divisions. <br />Modeling was done for the South Central Division ~o compare <br />modeled results wit~ the results of the Southern Utah program. <br />Since ~he ~in~a Mountains have proven difficult to seed in <br />previous programs, three different modeling approaches were <br /> <br />Lried ~here. <br /> <br />As t~e modeling studies were being made, it was observed <br />that results ~ere very sensitive to the pre-specified cloud <br />liquid water contents. To provide for some intercomparison <br />between divisions, a maxi~um water content of 0.5 g!m3 was <br /> <br />used. <br /> <br />Liquid water conteL~S varied according to location <br /> <br />relative to terrain but never exceeded that value. Modeling <br /> <br />results are given ~n each sub-section. <br /> <br />5-14 <br /> <br />, <br />