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<br />S,"'PIJ:\(;.S1n: SI:nCTIO\- i\'l'iERL'
<br />
<br />In the NAWQA pro~ram. sampling-site ~e1ecli()n needs to
<br />meet national and ]ocal criteria. Because NAWQA is a national
<br />pmgmm. wme sites were sekX'too to meet national goah,
<br />Watt'r-quality issut's defined by the local reo;ource managers also
<br />were considered in site \Cltttion to en'>ure that the ~tud)' design
<br />wa... nOI onl)' nationally consi..tent but locally relevant. Addi-
<br />tional fat:toNi mal contributed to site -.ekction were local
<br />intere'" in wiiler-qualit)' condition... limitation of resourc-e~. and
<br />JXltential for additional research,
<br />
<br />The general procedure u..cd to sela:t site.. for the ba~ic.
<br />fixed.site network is a.. follow.., The potential efft."Ct.. on ....ater
<br />qualit}" of the combination of physiography, climate. geology.
<br />soils, land U'>C. and ....'3ter management were anal)'led. This
<br />analysis wa10 combined with the imponant national and klt.-.d
<br />water-quality i10sues to generate a Ii..t of potential ba.sic fixed
<br />sites. A ba..inwide reconnaissance of these potential sites was
<br />conducted during March 1995. During the reconnaissance. eat.'h
<br />site wa'i evaluated as to ..uitability for hydrologic and biologic
<br />!'>3mpling. Sites that were c1a.'isilied as unsuitable for sampling
<br />were excluded from funher eomideration. Examples of factors
<br />that ....ould render a site unsuitable are poorly mi~ed cn)!;s
<br />section. pllOr hydraulics. unsafe conditions. or lack of aeees...
<br />
<br />Alkr the reconnaissance. the potential basic fi~ed sites
<br />.....ere ranked by suitability for sampling and rotentiallt) meet
<br />local and national proEr.nn Eoal... Ancillary items then ....ere
<br />included to generate a linal priority list from ....hich the b....ic
<br />fi~ed sites .....ould be sclcned. If all other item.. .....ere similarly
<br />mnked. higher priority was given to sites with a current gaging
<br />station (panicularl)" on the main stem .....h"rc gaging-station
<br />installation is costl)"). sites .....here the NAWQA program could
<br />be integrated .....ith other water-quality studies. and sites at ....hich
<br />a....th,e local interest in water-quality concerns ....ere deemed rele-
<br />vant to national ohjectives. Site.. at .....hich other Federal. Stale,
<br />or local agencies .....ere collecting data 10imilar to NAWQA data
<br />were gi\'en a lower priority in order to e~pand water.quality
<br />sampling thruughoutthe basin. The final list of JXltential l>ites
<br />was extensively discu..sed with local .....ater.resource managers
<br />and NAWQA national synthesis personnel. The final 14 ba."ic
<br />li.lI.cd sites then were selected by study unit personnel.
<br />
<br />Stream.gaging statiom were in..talled. .....here required.
<br />during Seplember 1995. Water-<jualit), sampling Ixgan al all
<br />network sites in October 1995 and will continue for a minimum
<br />of2 years.
<br />
<br />SEI.Ecn.:n REFERE:\CE."i
<br />
<br />Apodat.'a. L.E.. Driver. KE.. Stephens. V.c., and
<br />Spahr, N.E.. 19%, Envirunmental seuing and impliealiom on
<br />.....ater quality. Upper Colorado River Basin, Colorado and Utah:
<br />U.S. G.-ological Suryc) Waler-Resources Investigations
<br />Repun 95--4263. 33 p.
<br />
<br />Gilliom. RJ., Alley. W.M.. and Gunz. ME. 1995,
<br />Design of the National Water-Qualily Assessment Progmlll-
<br />Occurrence and di,tribution of .....aler-quality conditions:
<br />U.S. Geological Survey Cir....ular 1112_ 33 p.
<br />
<br />Sep!ombet 1996
<br />
<br />Leahy. P.P,. Rosenshein. l.S.. and Knopman. 0.5._ 1990.
<br />Implementation plan for the National Water.Quality
<br />As'-Cssment Program: U.S. Geological Survey Open-File Repon
<br />90---174. lOp.
<br />
<br />Nationa] Re1>Carch Council. 1990, A review of the USGS
<br />National Water.Quality Assc....mcnt Pilot Program: National
<br />Ac"d~my Press. \Va.,hington, D.C.. 153 p.
<br />
<br />National Rel>Carch Council. 1994. National Water.Quality
<br />A..se..,ment Program-The challenge of national sYnlhesis:
<br />Nalional Academy Press, Washingtoll. D.C.. 51 p.
<br />
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<br />Infonnation un tcchnit..al repl)nS and hydrologic dala related to
<br />the NAWQA program can be obtained from:
<br />
<br />UppcrColorado River NAWQA Manager
<br />V.S Geological Survey
<br />Bldg. 53. Denver Fedeml Center
<br />Mail Stop 415. Bo'\ 25(~6
<br />Dcn\"Cf. Colurado HO:!25
<br />(03) 236-2101 e.\1. 224
<br />email; nedriwr@usgs.gO\'
<br />
<br />-NumulIl E. SI't.lhr. Nanc)" E. Dril't'r; lll/d H'rlin C. Stephen.,
<br />
<br />~fanu...:ript and [aJout: Alene Brog:an
<br />EdIting: ~fartha CnI....fon:!
<br />De~ign: John Evan,
<br />Final iIlu,trations: Alan Dur.m
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