Laserfiche WebLink
<br />~~~ <br />~~~j~~E <br />S?:~:~; <br />~~t~ <br />~ <br /> <br />:fp$Ft~ <br /> <br />~<"~:~>:.,> <br /> <br /> <br />m~i{.~~~~4_,JifIII~l:ld <br /> <br />OOO::H ~ <br /> <br />assumption of a 15 percent increase may be cons,ervative, Advance <br /> <br /> <br />analysis of parameters in individual storms pert,inent to a well- <br /> <br /> <br />defined seeding criteria will limit operational seeding to storms <br /> <br /> <br />where precipitation increases are likely. Overseeding, which may <br /> <br /> <br />cause precipitation decreases, will be avoided. <br /> <br />Based on annual isohyetal maps similar to Figure 5 and the ratio of <br />annual precipitationat the high-level stations to the winter precipita- <br />tion, the average annual precipitation over the 14, 200 square miles <br />of major runoff producing-target areas is about 38 inches. With only <br />some 13 inches of runoff being produced, the total losses and water <br />use within the target areas average approximately 25 inches per year. <br /> <br />" <br /> <br />The actual annual loss potential for the high elevation watersheds <br />should be nearly satisfied, on the average, by the 25 inch total loss. <br />It is reasonable to expect most of the additional winter precipitation <br />to show up as spring runoff with relatively little loss on the incremental <br />increase. For estimating the anticipated yield it is assumed that 85 <br />percent of the increased precipitation will result in runoff with only a <br />15 percent average loss experienced. <br /> <br />The anticipated average annual yield of new water in the Upper Colorado <br />River Basin is 1,870,000 acre-feet. This should be possible by apply- <br />ing reliable weather modification techniques developed within the next <br />10 years. <br /> <br />21 <br /> <br />~I <br /> <br />~-;';;:.~':i;'1 <br /> <br />~f~:~i~ <br />It~ <br /> <br />:- ..;~.::~-;- <br /> <br />'.fL.. <br /> <br />hji~~ <br /> <br />