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<br />r-- <br /> <br />, <br /> <br /> <br />EXPLANATION <br />. Urban <br /> <br />Agriculture <br />Rangeland <br />Forest <br /> <br />Water <br /> <br />Tundra <br /> <br />" <br /> <br />40Mllf~ <br /> <br />20 40 Kll..OM~TfRS <br /> <br />Figure 5. Land use In the Upper Colorado River Basin study unit <br />(modified from Marschner. 1967) <br /> <br />SELECTION OF WATER-QUALITY SITES <br /> <br />KL'''iulh from L'valuation or the environmental \cllillf: were Ilsed <br />tn (ksignllic sLlrfacc-\.\'<lkr- and ground-water-quality' sampling <br />1ll'lworks for the l'COl. "\Iud)' lIllit. Por the "iurfacc-water-qualiIY <br />\al1lpling llclworl (jig. I L 14 sites have heen c\lahlishcd to asses", <br />ll<llllra] background wilier-quality condiriolls: dfects of mining. <br />llrhan/rccrl'atiol1al. al\(l agriculluralland uses: ~lI\(llhc water qllalily <br />of largl."r streams IIl:l! integral!..: Illultiple land uses upstream from <br />lilt' \alllpling silL'. S;llllpling \elecrioll was based on drainagc area. <br />land lise, amollnt or available data, il1lportancl' to local. Statl'. and <br />f-edcral agcllcic:-.. l"\tCllt of ongoing and past ...;ludies in the area. and <br />ahility to clllllparc the \vater-yuality data collcctl'd in the hasin <br />\\'ith till' other stud~ units or the ":-JAWQA program on a national <br />per...;pccti\T. Film charac(cris(ics: cOJlcclllratiofls and lmids of <br />nlltrients. major iOl1s. ml'lals. and '\t1spcndcd sediment: and aquatic <br />biological cOlllmunities will be lllea"urcd. ",unpled, or de...;criocd al <br />these "ill'''. <br /> <br />(jrotJnd~watl'r ...;arnpling \vill focus ollll1e effects or milling. <br />urban. and agriculluralland use.... 011 the "hallow ground-water <br />quality' in the basin. For the grouml.watl'l"-quality sampling <br />network. abou! J() \\'l'lls will bi.' ...;ampled fnr ...elected land L1:-'C'" in <br />the LCOL basin. III cOfHras1. a general aSSCS'imeJll of major <br />grnund-w;llcr SDurn'" 111 the Southern Rocky :Vlountain..; phY'iio- <br />graphic province of the ba,,,in also is planned. with ahout .10 wells (0 <br />ix' "arnpled Thl' !!l'lIcral as...e......ment "'i.llllplin!! \\"ill ifl\"eqig~l1t' <br />hnlh tli.Hural and human factor... on \Vater qll;]lil~ <br /> <br />Ap(l1 ~996 <br /> <br />References Cited <br /> <br />Apodaca. LE.. Driver. N.E.. Slcphell'i. v.c.. and Spahr. \J.E.. 1996. <br />Environme1ltal sellin? and implicatiolls on waler quality. Upper <br />Colorado River B~hin. Colorado alld Utah: U.S. Geological Survey <br />\Vatn-Resource... Investigations R,,:port 05-4263. 3J p. <br /> <br />Bureau 01' CCllSUS. 1990. 1992. 19l)()- -1902 census of populati{)]1 <br />and hOUSIng: \Vashing.ton. D,C.. data on CD-ROM. <br /> <br />C()I()rado ClimalC C('flICr. 19K4, (\)Iorado avera!!c <.lIlnual <br />precipitation I ()51 to 19XO: Fort Collin.... Colorado Climate ('elller. <br />,calc 1:';(1).1101). <br /> <br />Leah). PY. Ro...;ellshein. J.S.. and Knopman. D.S.. 1990. <br />Implementation plan for the \lational \Vater~Quality Asses>;llll'lIt <br />Pro!!ral1l: lj.S. Geological Survey Open-File J-{eport 90-174. I () p. <br /> <br />\1ar"chncr. F.J.. 1967. ~vlajor land uses ot"the United Slates. <br />:Hlaplcd from u.S. Departmenl of Agriculture: National Atlas of <br />Ihe United States. p. ! SK-I Jl). "cale 1:7.500.000. <br /> <br />Schruben. P.G.. Arndt. R.E.. and Bawlcc. W.J.. 1974. Geology <br />of the conterminous United Slales at I :2.500J)(){)- A digital <br />reprcscnt<llion of the 1974 P.B. King. and ~1.J\'1. Beikman map: <br />U.S. Geological Survey Digital data series. DDS-l L 011 CD, ROM. <br /> <br />L.S. Department of (he Interior. 1995. Quality of water Colorado <br />River Basin~Progress report no. 17' U.S. DeparllllCIlI of the <br />Interior. 96 p. <br /> <br />Went7. D./\... 1974. Effect of minc drainage on lhe qualily of <br />...treams in Colorado. 1971-72: Water Conservation Board. <br />Watcr Rc,,;ollfces Circular 21. 117 p. <br /> <br />Information on technical reports and <br />hydrologic data related to thc NA WQA program can hc <br />obtained from: <br /> <br />Upper Colorado River Basin NA WQA Manager <br />U.S. Geological Survey <br />Bldg. 53, Denver Federal Center <br />Mail Stop 415, Box 25046 <br />DCllver, CO S0225 <br />(303) 236-210 I exl. 224 <br />email: ncdrivcr@usgs.gov <br />Weh ,ite: http://wehserver.cr.usgs.gov/nawqa/ucol/ <br />uco I_homc.html <br /> <br />\"'''- <br /> <br />",\o'r...rOr <br />,~ . . . ;" <br />~ . " 't <br />.... .-: <br /> <br />. <br /> <br />~". . ; <br />''"::,...... <br />~4te~..' <br /> <br />Fact Sheet FS-l 09-96 <br />