Laserfiche WebLink
<br />. <br /> <br />. <br /> <br />Inasmuch QS the linter beQring beds Qre cut off in fr11 dir8L.~ions <br />from outsido sources of vo.ter except through underlying ~'oek8 <br />contQining poor vo.ter, it foliovs that the source of fresh water <br />Drost be entirdy wi thin the High Pla.ins aroa and must be the rain <br />and snOll thQt fall on its surfo.ce . . . 11 <br /> <br />Barnes, et Ql., TInde 0. more recent study and rOQehed similar con- <br />cludons. W <br /> <br />Qualitv.- DQta presented in va.rious progress reports of the Texas <br />Skte Boo.rd of Hater Engineers o.nd the U. S. GcologicCLl Survey as ,1811 us <br />experience indico.te thQt the ground ,lQter supplies in this o.rw Qre satis- <br />fQctoI"J for domestic c.nd c.griculturCLl use. <br /> <br />s:l~lQntity.- An estinw.te of the qu..'1.ntity of Hater in storo.go with4.n <br />the irrigatod QreQ of the Southern High Plnins is carried in Prozress neport <br />No.7. :2./ The estimate Clnd some ef tho uJlderlying assumptions aro giv,m <br />below: <br /> <br />An estill1:lto of tho total quantity of \mtor underlying the High <br />Plains is of little value in itself, because much of the water will <br />not dmin out by gravity o.nd ,r.Hl net bo rolGased to wells. If it <br />is assumed that tho water-bearine so.nds will yield water equivnlent <br />to 30 percent of their volumo and that these sands renresent voltune <br />and thc,t these sands repreGent 65 porcent of the totd volume of <br />the sQturo.ted formation, the product of thcso two factors would be <br />equivalent to " spccific yiold of about 20 porcent for tho <br />snturated part OJ~ the formntion. In addition to the wOoter drClined <br />by gravity from the sands and gravoIs, some water Hould be squeezed <br />into the so.nds from the interbedded clays. The ultimnte vnlue of <br />the specific yield is believed to be greater than 15 but 10ss tJ'o.n <br />20 percent, and the totoJ. cffecti.vo storage in tho Coverage of 210 <br />feot of. saturated material underlying the 4-1/4 million acres <br />within the irrigClted region is believed to be near 150 million <br />ncre-feet. <br /> <br />21 <br />/;/ <br /> <br />If it were osto.blished that onJ.y tho vater lying nbove 200 feet in <br />depth could be utilized oconomically, the thicknesG of eaturatod <br />section wotud bo approximately 130 feet, and the available supply <br />j./ould be approximatoly 100 million acre-fcet. It is to '00 under- <br />stood that these computations ore based en many nssumptions that <br />have not yet been vorified and on limited control data that mo.y be <br />adjusted as more informntion becomes available. <br /> <br />\,hite, H. r,., Broadhurst, Vi. L., end Lung, J. H. "Ground. Hater in the <br />High Plnins of Texa,,". U.S. Geoloeical Survey ViS P 889-F, p. 386. 1946. <br />Barnes, J. R., Elli", H. C., Leggat, E. R., Scnlapine, R. A., and George,l' <br />O. "Geolo!w and Ground Water in the Irrigatod Rogion of the Southern <br />High Plains in Texm:". Progress Report Ho. 7, Tex(1.s state Bourd of <br />Hllter Engineors and U. S. Goologicnl Survey. 1949. <br />Ba.rnes, J. P.., et ale "Geology and Ground Wnter in the Irrigated Region <br />of the Southern High Plains in TeX.:ls". Op. oi t. <br /> <br />v <br /> <br />6 <br />