9431

• 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

9.2
~ 9.0
Z 8.8
Z ~ 8.6
= Q 8.4
~- O
Z 8.2
Q
~ 8.0
7.8
Z 15
W
C7O~
xOa~W 10
~ ~ ~ J
W Z J
~ W J W
~ Z g a 5
~O?
OV
0
25
i i i i i i i~ i i r
+
+ + + + + +
+ + +
+
+ +
+ + + +
+ + + + + + +
i i i
+ + + + + +
- + + 66 percent +
178 percent + of saturation +
of saturation + ~ +
+ + + + + + + + + + +
i i i i
+ + + + + +
+ +
+ + + +
+ +
+ + + +
+ + + + + +
W
0: ~
Q ~ J 20
~~U
FZ
15
1200 1600 2000 2400 0400 0800 1200
23 24
AUGUST 1999
Figure 7. Diurnal measurements at Yampa River above Elk River, August 23-24, 1999.
8.9
t~ 8.8
~ 8.7
Z
Z ~ B.6
-0
= Q 8.5
°-~ 8.4
F 8.3
cA 8.2
8.1
10
Z
W Z
X ~ Q ~ 9
O~aCF e
~ I- ~ J
WZJ
Jw~W 7
Ufa
~pZ 6
~U
5
25
Z ~
- ~ 24
LLI V)
j W 23
FU
~ W 22
a ~ 21
~ C7
F ~ 20
19
1200 1600 2000 2400 0400 0800 1200
23 24
AUGUST 1999
Figure 8. Diurnal measurements at Yampa River below Craig, August 23-24, 1999.
~ ~ ~ i i
+ + + +
+ + + +
- + +
+
+ +
+ + +
+ +
+ + +
+ + +
i i i i i i ~ i
+ + + + -
+ + ~ + _
-+ 140 ++ -_
percent + 78 percent _
- of saturation + of saturation + _
_ + ~+++
+ + + + + + + .
i i i i i
- + + + + +
_ + + +
+ +
- + + +
_ + + +
+ +
+ + + + + +
INTERPRETATION OF DATA COLLECTED FOR THIS STUDY 13