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<br />Fn..... ";; D'''''j''<-5f-..... Pr'-'ceJ.....-~,:r.-."-iE..v~/..Af-:r., vf If,/,,y(,c'nf 5~eJ.,,'j' E.ff~<iJ +-.........
<br />Obse......~J c...h._d. T7f"t:!:i v,'~(" ff.c c..<.IL"Il..l~ ;::'..~(" r),*S;" p./L.r ~'UJo!<T"" ~ L.Hje..,.....:;fN.l 1'176
<br />A cCJI:p3.rison of the: nor:~31ized seed/roo-seed r;:J.tios in the are<lS
<br />most likely to be affected to the ave:-<lge effect ~crcss the. project and to
<br />the indivld~al site ratios io Tables 3.1 anc 3.~ ir.dicates $orn~ very
<br />int~resting prob;:J.ble seed effects. For every clotlu type in TablC!s 3.1 and
<br />3.2. the seed/no-seed ratios il:lproveJ--in sa:nc cases substanti;tlly,: Such
<br />an ovcn;helming lndic:J.tion would likel:. SUbbcst an o\:cr.:lll Llvor.1b!.e seedine
<br />response in the project arc.1 for at le::1st half of th~ obs~rved cloud types
<br />
<br />nnd a favor..ble tendency for t.",o ::>.or2 types. (,nothcr very intl.'resting
<br />
<br />point to make 1s that ....bcr: ti,..: ,.,
<br />
<br />"O::0d.'::('-:.~;(:.; C.l. in is c.;lcu1.1t(,'t! G\'",r
<br />
<br />the entire project arc;) for .::11. .:loud crlles :cr all five years of the
<br />program, the result Is a sc.:::d/Il,)-:;t!cd r.:ltio of O.~i. \.l1~n the secJ/no-s~ed
<br />ratio is calculated cent~t-e,i ,~:'. t:lC t:',<J....t-like:J:: area to be effect~J .q;ain
<br />for all of the same douJ typL':.i :!1~J fpl: the enti.re five years of th~ Piloc
<br />
<br />Project, the resul::ing r3cio is 1.14. 7h1::; could be interpreted as 3
<br />14 percent increase iro pH:ci;-,it:,t:cn in the expected ~re.:lS of effect for all
<br />the seeded d..ys' precipit;J.cio;1 ll: cOr.ip.::.:-ison to <)11 tl:e r.on-sect!ct! d.;lYs'
<br />precipit:ltion. This S11f;SE:stC(! app<1rcnt incrE:..sc in precipitation. as a
<br />result of selective cloud seedinG esin~ the opcr~tional criteria of the
<br />Pilot Project, is also very near the estirn.:lted 16 percent increase in the
<br />original project design. Thcse results might also support as essentially
<br />correct the gross operational criteria utilized during the five se;)sons
<br />of the Pilot Project.
<br />Another point to make is th~t in both the Climax and the Wolf Creek
<br />weather lDOdifictltioo projects conducted by Colorado State University,
<br />the project areas induded both the t1p~,'ind and the lee sides of the t:lountain
<br />barrier. D,uring high '.:inci occu:-n:nccs ever these barriers. f.1.11inl~ pre-
<br />cipitation could be tr<lllSilortcc [row tlle \"'inGw.:lrd to the lee side of the
<br />baIrier. In these projects these n2tur.:ll ndjustrr:ents in the precipiIation
<br />fallout patterns would be a\-erar:cd out as net zero effects or a r.lUch smaller
<br />precipitation cecrcilse tha:, \:o\l!d be o.:<.llClll;)t~J for the same. type of
<br />occurrence for the seeding result:; of thl:: Pilot Project. The reason for this
<br />was thac,onlv the \"'inci...'.:trd side cf th~ t:~lr('ier \....:lS included as the t;)rget
<br />
<br />or affected area for secdir.;, results in the design of the Pilct Project.
<br />Alse, both the Climax ~nd the; Eolf C:-c~k rroject~ adjusted their gener.1tor
<br />
<br />nctt:orks for v::!.rious '.:il,d (~ir.:'ctic:':.s Juri:,!; seeding orer~tions so .::IS to
<br />
<br />0111".1)'5 t.-.!rhet t:lc' ~;...~Jin; r:ltcrL"1l to\"<l,':~; .\ :;I'eci~lc I'nil;t or .1re.:1 oi
<br />
<br />effect. Co:;sC~ut'ntly. 1:1'.[; ,~i:.J;:l~nstic e\':1Ll~::i.O:; procedure used he:-e. in
<br />
<br />P.Ut ) '.:oulJ :::orc sir.a.:!:!tC ,! ~i~,liL\r :jr~.\ of effect .1r-pr()~!ch to c'.'.llu:1ting
<br />
<br />tIlL ~..::eJil;:', reslllts C'f :.i1e: :'ill'C I-'rvj~ct ,i.'~'! ~;i::.
<br />
<br />:1') ~nc p(Jint i~ the
<br />
<br />l'il.,t !'r<.~j._;r.t t:II';;';::: .1::<:.1 ,-":I!" '-l;\",~y:; ~ " '>l,...,:cd
<br />
<br />::'~Vl ~!! ~11~.1 <\ir~cti0ns.
<br />
<br />-23-
<br />
<br />A-II-7
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