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I rucndlciNankrrvisiPorth I'iwi:23 5/22/2003 <br />1997 data pairs still fall within the contidence hands. I'hc trend may pussibl}, indic;atc incrcased <br />depletions ul' stream (luw for agricultural or municipal divrrsion. One would want to cumpiur <br />this plut with plots tor thc samr stream gaugc against othrr snuw coursc; or rrccipitation sitcs in <br />urder tu verify which is changing. T'hiti can lx dc?ne routinely using the h1ti I?X('f:I. sprcacl shect <br />pmvided in Appcndix C. <br />Far each e?t'thc 9 refercncc stream gauging sitrs depictcd in I ahle 4. an analytieal procedurc has <br />develupcd in an MS f;X('}•:I, spreadsheet (i?rntal that: I) characterius thc relatiunship letwccn <br />pre-I997 stream fluw and cithcr snuw pac:k accumulatiun ur prrcipitatiun at 3 ur ii-iore ncarh? <br />sitrs, 2) allows user input of post-1997 data tor stream flow and snow pack or precipitation, and <br />3) plots and allows comparison ot' thc prc-1997 stream tlow rrlationship with thc Exost 1997 <br />ubservationti. 1'hc uxr can thcn drtrrmine if a covauiance analysis is warranteef to deterniinc thc <br />significancc of what might aprwar lo tv a pvst 1997 drparturc. 'f'hc uscr is advised that virtually <br />all the streams tx-ing reterrnced are suhjert te> diversions (see Appcndix ('). The dc.>uhle-rnass <br />plots apFxar consistcnt indicating thc dcgrce uf divcrsion is not changing. I Iowcvcr, that is a <br />tartur that must tx considered is futurr departure is delrcled. <br />x Saratuga 1 SSF: VS <br />}=ENCnMI'MEN'I' RIV Afi flO(; PnRk CR NR f:NCAMPMl:NTWYC) <br />- 700 <br />? . . . Oata 1997 <br />$ i'redi<<mi rit ior Data <- 1997 <br />? 600 95% CI (Mwn) <br />? 95% C'I (Muui) <br /> 500 ?»°% f'nxl Int (I i?tn) <br />C `>>% I'ral Int 11 uhsl <br />O 95% Pral Int (All rx?% obs) <br />c? 400 Q5% Prai Int (All rxw uhs) <br />? I )ata > 1097 <br /> <br />j 300 <br /> <br /> <br />? ? 00 <br /> <br />v 100 .?" <br />, <br />o <br />; . <br />,. <br />o ?• <br />00 0 <br />M <br />N <br />1?0 <br />o -l0U . . . _ <br /> , <br /> 0 100 <br />,-. - _ , . . . _ . f <br />200 300 400 <br />WY7990: Curliulative Annual Precipitation (in) <br />Figurc 20. I'he duuble-mass plot of cumulative stream flow at the t;ncampmcnt River atove I lug <br />E'ark plotted over cumulative precipitation at Wyoming sitc 7990.