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<br />FIGURE I
<br />
<br />COLORADO RIVER BASIN
<br />and Quality of Water Data
<br />1941-80
<br />
<br />Current samplingl/
<br />Frequency
<br />
<br />F.low
<br />
<br />Colorado River near Cameo, Colorado
<br />
<br />Gunnison River near Grand Junction, Colorado
<br />
<br />Dolores River near Cisco, Utah
<br />
<br />Colorado River near Cisco, Utah
<br />
<br />Animas River at Farmington, New Mexico
<br />
<br />San Juan River near Bluff, Utah
<br />
<br />Green River near Green River, Wyoming
<br />
<br />())
<br />
<br />Green River at Green River, Utah
<br />
<br />Yampa River near Maybell, Colorado
<br />
<br />Duchesne River near Randlett, Utah
<br />
<br />White River near W~tson, utah
<br />Price River at woodside, Utah
<br />
<br />San Raphael River near Green River, Utah
<br />
<br />San Juan River at Shiprock, New Mexico
<br />
<br />Little Colorado River near Cameron, Arizona
<br />
<br />Virgin River at Littlefield, Arizona
<br />
<br />Colorado River at Leels Ferry, Arizona
<br />
<br />Colorado River below Hoover Dam, Arizona-Nevada
<br />
<br />Color~do River below Parker Dam, Arizona-Califor~ia
<br />COlorado River at Imperial Dam, Arizona-California
<br />
<br />1/
<br />1/
<br />1/
<br />
<br />Flow
<br />Daily
<br />
<br />Daily
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />Daily
<br />
<br />Daily
<br />Daily
<br />Daily
<br />Daily
<br />Daily
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />Dai Iy
<br />Daily
<br />Daily
<br />Daily
<br />
<br />Ouali ty.!l
<br />Daily
<br />Daily
<br />Daily
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Daily
<br />
<br />Intermittent
<br />
<br />Daily
<br />Daily
<br />
<br />Biweekly
<br />Every 5 days
<br />Daily
<br />
<br />Sampling frequency as classified by the UeSe Geological SurveYe
<br />Electrical conductivity measurementse Frequency of complete
<br />chemical analyses varies from station-to-station.
<br />Sampled quality data .I................'........;,;)
<br />Measured flow record ~,~~~((~,,~~~~\\1
<br />
<br />.
<br />
<br />.
<br />
<br />88TE
<br />
<br />1940 1950 1960 1970 1980
<br />I I I I I
<br />3/~:;..~~'{~(\.(Z~\..~~~~~{\.~~~~~~~~~~~~~~~~~~~~~~~
<br />~~~i(~~~~~~~~~:l~X<<.~<<.<<t~
<br />~~~:i((~<<"",t((~~~:l~{~~~~~~~
<br />I.:.........:;::';.:';.:.:.:.;...........,"',.,~.:-,...........'.....,:1
<br />~""'-~\~'-'-"""""'~..;.~"'-""''-'''~
<br />~\..\.~~~~~~<<.'-~~~~~~~,,(,~(,,~~~{\.~~~~~~~~~
<br />L(~~~~(\.,,~~~~~~<.~~~(~~~~~~~~~~~~~~~~~~~~~~~,~
<br />
<br />~,................,...~.........,."'....~
<br />~~~~"-.'-~~~.~~X<<.~~
<br />~~~~~~~~~~~~,,~~~:K~(~<<.X~{(~~~~~~~~~~~
<br />1\.,"""",t\.((~{~C;..~~~~~~~{~~~,~
<br />~""""',t1.,",.K~~~~~Z((~:((~~~Z(~~~((~~~(~~
<br />..,""""'~~((~:((((~~((~:((~(~Z~(~<<.((~~((~~~:(~
<br />"-~,k~~:;;.~~~~~~~~~~~~~~~~~:;;.~~~~~~~~~~~~
<br />~~,......,...,........."".~~ ~....,.,~
<br />~ . .. .~ ~~~~""~,\..,,~"""~. ~~ ~,"",-...:.:' .
<br />""~"""""'~~~~~~<~<<.~~~~~{~~(~~~~~~~~
<br />...~'-(~'-.'-~,~'-.~""'-,{,(~:(('-'(~,,-K~~~
<br />..,""",{(~~Z((~~~(~~ZZ~~~Z(~~Z~(~Z((~ZZ~<<.:K~
<br />~~....."""...,.......".,.,..................~
<br />~ -.......~~ ~~~~"'~~''''''~~'''''"''~~''''"''',Z,''~
<br />~"",t\.(~~((~"(((~~;;.((~;;.((~~:((~~;;.((~;;.((~~;;.~
<br />~..........,.".,.............."'..,.,................~
<br />~,<<.Z,\.<<."''-~''-.~~~<<.''-.,\.<<.'&.,''-.'-<<.~\..~'-'~.
<br />~-t((~Z~~~Z(~;;..~Z~~~Z(<.~((~~Z(~~Z((~~Z(~~Z({(,~
<br />
<br />.
<br />
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