9347

• UCREFRP Catalog Number: 9347
• Author: Neuhold, J. M. and T. C. Annear.
• Title: An Ecological Characterization of the Yampa and Green River in Dinosaur National Monument.
• USFW Year: 1981.
• USFW - Doc Type: Logan, UT.
• Copyright Material: NO

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Table 2. Mean high and low and average annual mean (X) concentration of.elements in the Yampa, Little Snake, and
Green Rivers from 1951-1979 .
Dutch John Jensen Little Snake a b e
1964-79 1964-79 1951-60 1966-79 1951-60 1966-79
High Low X Hi h Low X Hi h Low X High Low X High Low X High Low X
Na (mg/1) 72 52 62 73 19 50 213 12 27 189 11 69 76 6 15 69 6 37
-IC03 (mg/1) 206 178 189 202 107 167 359 103 143 279 24 192 199 56 102 221 65 162
504 (mg/1) 263 195 222 194 54 156 614 23 61 367 21 120 134 10 35 183 16 88
Cl (mg/1) 25 16 20 31 7 20 111 4 10 78 3 24 57 2 8 33 3 16
PH 8.3 7.5 7.85 8.3 7.4 7.9 8.1 7.2 7.7 8.4 7.4 7.9 8.0 7.0 7.5 8.5 7.3 7.9
Conductivity ` 849 700 759 818 319 608 1797 190 386 1236 183 696 712 121 254 706 138 435
u mho's J
I
i
Values before 1967 are wei hted means. Values after 1966 are time weighted means and tend to be
somewhat larger (up to 25%3 but are more accurate.