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<br />UNITED 5" ^., "'-5
<br />DI.'T^"IMI:.NI UI" II!'I.INIFlllon
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<br />I f-"""^l.\ trllf:n,llIt......I.II.' nl'"!^I~.'~n;'l75
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<br />Febrllary ::6, 1968
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<br />PROPOSEI) GROllN.Il-\.MTER STIIIJY UF TII" 11 ((;11 PIAl ,;:'
<br />OF cnLORI\IJI) lI'i Till; 11.5. \:1,01.1'1:1.(:1\1, S"RVEY
<br />
<br />SUIlJECT:
<br />
<br />FOR 1\1)1)Tl'lONAI, T.NFORNI\TION CALL;
<br />
<br />Edw<lrd A. ~1oll1.der, J)i.~trict Chi.er
<br />Writer ResQur<....cs Oi.vlsl.nll
<br />2J)-361', v.xt. 8(,21.
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<br />
<br />The lH.gl\ Pln1.l\H 1M 1\lmnHt l~f\tnlly dCllelldt~nt 0" gre""tl .....,nl(~I' 1'\\" I 1'\:\Ullt' 1'111
<br />slIpply, l;rllulId-watl'[ ,...it..l1dr..1w:JJs lor irrig:lli.lll1 11':18 dtlubJ.l!d since JC;(J/,
<br />find fllture dcve.lupmcllt of th.!.." reSt'tlr.e€! i.R ;1Tllif..'ip;Itcd.
<br />
<br />Previ.ous st\\d1.es were made of i.ndi.viduAl cOllnti.es hy the GeolngiC.11 Sur.vey
<br />6ince 1946 and reslllts were sllmm"rizcu by Boettcher in Water-SlIpply Paper
<br />1819-1 (1966),
<br />
<br />The Colorado Water Conservation Board, State Engineer's Office, and High
<br />Plains Conservancy Districts recognize the need for more refined data to
<br />evalllate the ground-water resources of the High Plains, These St"te
<br />agencies are attempting to manage the ground-water supply, but they need
<br />a basis for predicting and then evaluating the effects of proposed changes
<br />in ground-water use.
<br />
<br />The Water Resources Division of the V,S, Geological Survey is currently
<br />making reconnaissance studies in the High Plains to monitor the effects
<br />of ground-water withdrawal on depletion of storage in the Ogallala, In
<br />order to provide factual hydrologic data needed to manage the ground-water
<br />supply, this program should be expanded and will include the following:
<br />
<br />1. Inventory, measurement of discharge, and determination
<br />of the annual withdrawal of irrigation wells.
<br />
<br />2. Yearly measurements of observation wells to determine
<br />the effect of grouTlu-water withurawaJ. on aquifer stof<=!ge.
<br />
<br />3. Installati.on of. Rho11t 100 w~Jl8 to improve ohs~rv:1ti.cTl
<br />netwflrK.
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