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<br />000903 <br /> <br />Date: MAY L 1987 <br /> <br />SURFACE WATER SUPPLY INDEX <br /> <br /> <br />YAMM' WHITE - N. PLATTE <br /> <br />/. <br /> <br />, <br />, <br />, <br />SOUTH ~TTE ...~ <br /> <br />r;, . """"- " <br />LEGEND <br />rr:5'1 ..._Majo._.. <br />: ~ _ Main _ndo,. <br />/ GIlSolrf- W.IO. <br />Sol"" ...... <br /> <br />SCALE <br />, <br />, <br />, <br /> <br />\ \../ <br />\ <br /> <br />, <br />\... ARKANSAS <br />~ ,--.~ <br />...~ <br />RIO GRANDE '..---r'- <br />~ . l=:C <br />~ E!d] : <br />'-.. ... I <br />.~ t-, <br />~~"_~ ,,0' <br />, '-...,/}-'" >..__.~}Y <br />COLORADO <br /> <br />._~,,~ <br />rf41 (' <br />_.~~ <br />.~ <br />.- <br /> <br /> <br /> <br />~~ <br />._. auppl, <br />OZ <br />Mar ..._1 <br />-2 _rato drought <br />-I <br />.. ..... drought <br />..t..... drollght <br /> <br />The Surface Water Supply Index (SWSI) is a weighted value derived for each <br />major basin which generally expresses the potential availability of the <br />forthcoming season's vater supply. The components used in computing the <br />index are reservoir storage, snovpack water equivslent, and precipitation. <br />The SWSI number for each basin ranges from a -4.00 (prospective vater <br />supplies extremely poor) to a +4.00 (prospective water supplies plentiful). <br />The SWSI number ia only a general indicator of aurface vater supply condi- <br />tions. Further data analyses tUy be required in specific aituations to IDOre <br />fully underatand the impacts of abnormally dry or wet conditiona suggested <br />by the SWSI. Development of. the SWSI haa been a cooperative effort between <br />the Colorado State Engineers' Office and the Soil Conservation Service. <br /> <br />20 <br />