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Last modified
7/14/2009 5:02:35 PM
Creation date
5/24/2009 7:14:58 AM
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UCREFRP
UCREFRP Catalog Number
9431
Author
Chafin, D. T.
Title
Evaluation of Trends in pH in the Yampa River, Northwestern Colorado, 1950-2000.
USFW Year
2002.
USFW - Doc Type
Denver.
Copyright Material
NO
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H <br />Z <br />Z 0 <br />2~ <br />Qa <br />0 <br />Z <br />H <br />9.4 <br />9.2 <br />9.0 <br />8.8 <br />8.6 <br />8.4 <br />a,2 <br />8.0 <br />7,8 <br />7.6 <br />7,4 <br />3 <br />~~ ___~ Colorado water-quality standard <br />------ <br />2 5 ~. 12 <br />i ~ 10 11 ----------- <br />i ~ <br />i 4 <br />i ~ <br />i <br />i <br />~~ <br />16( <br />Z O 15C <br />W ~ <br />('3 Q 14C <br />X ~ 13C <br />O~ <br />p ~ 12( <br />W <br />J Z 11( <br />~ ~ 10( <br />p W 9i <br />C~ <br />8i <br />3 <br />f~ <br />i~ <br />i ~ <br />i ~ <br />i ~ -~ <br />~ ~ ,-' <br />i2 r~ `\\'~ 12 <br />i 5 \`~~i 11 <br />' ------ <br />' 4 ~~ i <br />~' Q ~~~ i <br />~ \ ~g <br />ri 0~ ~7 0 <br />200 <br />Z <br />F- <br />~ U Z 150 <br />O <br />UW~ <br />p~~ 100 <br />~ W ~ <br />J ~ ~ <br />~~~ 50 <br />(n ~ <br />z <br />Q <br />F- <br />Q <br />W <br />Q W <br />~ ~ <br />Z <br />W - <br />F- <br />U <br />J <br />Q <br />U <br />0 <br />-20 <br />04 <br />i ~ <br />i ~ 10O <br />i <br />11 <br />i 12 <br />i ~ <br />i ~ <br />.~ <br />- -- 6 -------r <br />3~~ <br />Note: Saturation of 1,000 percent for site 1 not shown <br />230 220 200 180 160 140 120 100 80 60 40 20 0 <br />DISTANCE FROM MOUTH OF YAMPA RIVER, IN RIVER MILES <br />1.4 <br />1.2 <br />1.0 <br />0.8 <br />0.6 <br />0.4 <br />0.2 <br />0 <br />-0.2 <br />-0.4 <br />-0 6 <br />~ ~ <br />3 <br />r., 6•--------------{__ _ <br />-' Q ~~ 11 12 <br />>12 5' 7 O`r------------- <br />~ 10 <br />i <br />~ / Calcite oversaturated <br />1 Calcite undersaturated <br />4O <br />EXPLANATION <br />--~-- Yampa River site <br />~ Tributary site <br />Note: number by symbol indicates site number <br />in tables 1 and 3 <br />Figure 14. pH and other geochemical indicators at Yampa River and tributary sites, March 13-16, 2000. <br />INTERPRETATION OF DATA COLLECTED FOR THIS STUDY 21 <br />
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