WSP11764

• File Number: 8273.100
• Description: Colorado River Basin Salinity Control - Federal Agencies - Bureau of Reclamation
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1984
• Author: BOR
• Title: Water Quality of the Colorado River System - Historical Trends in Concentration/ Load/ and Mass Fraction of Inorganic Solutes
• Water Supply Pro - Doc Type: Report/Study

6TOT

Table 8. - Significant long-term trends in concentration (my/(L 'a)) with highest confidence levels of the different
regressions. Associated trends (kg/(s'a)) for solute loads are in parentheses

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PERIOD

SF-IISON

CALCIUM

MAGNESIUM

SODIUM

CHLORIDE

SULFATE

BICARBONATE

SUM OF SIX ION'S

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UPPER COLORADO BASIN

STATION 9095500

COLORADO R[VER NEAR CAMEO. CO.

r933-45 DEe-MAR
MAY-JUNE
AUG-NOV

-2.93( -.9aOl

STATION 9152500

GUNNISON RIVER NEAR GRAND JUNeT

1931-64 DEC-MAR
MAY-JUNE
AUG-NOV

-.96( -.028)

".46( -.012)
-. tZ( -.025)
-.83( -.024)

-1.26( -.033)
-.39( -,018)
-2.57( -.076)

.25 C -. 007)
.28( -.009)

-4.131 -. 10S)
-.75( -.161)
-7.S3( -.240}

.05( .010)

-B.B4( -.173>
-12.1Sf -.35')

STATION 91S0000

DOLORES RIVER NEAR CISCO, ur
-.03( -.000) -4.04( -.025} -6.2Sf -.039) -,. S2( -.010) 4.49( .028) -11.73( -.074 )
.22( .014) 1.72( .103) 1.64 ( .09S) 1.23( .074) 6.09( .364)
8.49( .046> 14.931 .081 ) -S.S2f -.032) 3.89( .021) 15.39( .084 )
COLORADO RIVE~ NEAR CISCO UTAH
.6S( -.048i -.44~ -.032} 1.S7( .138) -6.63( -.490) -.7Bf -.056) -7.19( -.532}
-.23( -.147) .73i - .459) - .56! - .349) -1.72(-1.0741
-.34{ -.034) -1.41( -.1431 -2.00( -.202) -4.14( -.4171 .Bse .088) -S.73( -.576)
GREEN BASIN

'"
'"

1951-82 DEC-MAR
MAY-JUNE
AUG-NOV
STATION 9180500
1928-46 DEe-MAR
MAY-JUNE
AUG-NOV

STATION 9217000 - GREEN R. NR GREEN RIVER, WYO.

195 t -62 DEC-MAR -1.58! -.026) -.87! -.014 ) -6.12( -.102} -2.52( -.042) - t2-" 56C -.209)
MAY-JUNE -. 73~ -.087) -1.55( -. t98)
AUG-NOV -1.90( -.045 ) -_5S( -.015) -. a3( -.020) -5.21( -.123) -2.4 f( -.057) - '0. 81( - .254)
STATtON 9251000 YAMPA RIVER NEAR MAYBElL, co.
1950-S2 DEC-MAR .29( .003) .2S( .003) -.29( -.003) 2.26( .022) 2.4S( .024)
MAY-JUNE .1H .018) .24( .03S) .07( .011 ) .68( .107)
AUG-NOV .1f( .OOl} - .44 ( -.004) .97( .008)
STATION 9306500 WHI TE RIVER NEAR WATSON, UT
1950-79 DEC-MAR - .38( - .004 ~ -1.501 -.017) -2.10( -.025) -1.52( -.018) -4.83( - .056)
MAY-JUNE - .40( -.O17} -.62( -.027) .47( .0201
AUG-NOV -.42( -.005) -1.24( -.014 ) -2.03( -.023) -1.02i -.012) -4.32( -.049)
STA T ION 9315000 GREEN RIVER AT GREEN RIVER, UTA
1928-61 CEC-MAR .09( - .006) .11( -.OOSI - .3B{ -.026) .4B( .033) -.65( -.044)
MAY-JUNE -.08( -.037)
AUG-NOV - .41( -.029)
STATION 9328500 SAN RAFAEl RIVER NEAR GREEN RIV
1947-65 DEC-MAR -2.0S( - 004 ) -1. 25( -.002) -2.90( -.005 ) - .52{ - .00' ,. -f2.85{ -.022) -'.85( -,003) -16.o7( -.0271
MAY-JUNE -1.3H -.017) -3.31 ( -.042) .42( -.005) -14.31 ( -.1S0) -17.47( -.220)
AUG-NOV -3.30( -.007) -12.7S( -.0261 - r. 07~ - .OO2} -33.85f -.070) ,-43.49( -.090)