WSP00398

• File Number: 8200.760
• Description: Yampa River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 4/1/1980
• Author: USGS
• Title: Analysis of Stream Quality in the Yampa River Basin - Colorado and Wyoming - 1980
• Water Supply Pro - Doc Type: Report/Study

0)1985

CONTENTS

Page

Figures 17-19. Maps showing:
17. Sites where dissolved and total trace-element
concentrations in streamflow indicate upstream
sources of water-qual ity degradation in the
Yampa River basin, August-September 1975. . 49
18. Sites where iron concentrations in streamflow ex-
ceeded the water-supply standard, August-
September 1975. . . . . . . . . . . . . . . 53
19. Sites where man~anese concentrations in stream-
flow exceeded the water-supply standard,
August-September 1975 . . . . . . . . . . .. 54
20. Graph showing stream-reach profi les of total- anddis-
solved-iron concentrations, August-September 1975.. 56
21. Map showing sites where mercury concentrations in
streamflow exceeded the aquatic-life standard, August-
September 1975 . . . . . . . . . . . . . . . .58
22-80. Graphs showing:
22. Diel variation of stream pH at selected sites
along the Yampa River, September 23-24, 1975. 59
23. Frequency distributJons of iron and chromium in
stream-bottom sediments of the Yampa River
basin, August-September 1975. . . . . . . . 61
24. Relationships between iron in suspended and
stream-bottom sediments of the Yaw.pa River
basin, August-September 1975. . . . . . . . 64
25. Frequency distributions of benthic macroinverte-
brates in streams of the Yampa River basin,
August-September 1975 . . . . . . . . . . .. 70
26. Stream-reach profiles of benthic macroinverte-
brates in the Yampa River, August-September
1975. . . . . . . . . . . . . . . . . . . .. 73
27. Frequency distributions of periphyton in streams
of the Yampa River basin, August-Se.ptember 1975 76
28-41. Frequency distributions, Yampa River basin,
August-September 1975 through August-September
1976, of:
28. Total mercury in streams . . 80
29. Dissolved cadmium in streams 81
30. Total manganese in streams 82
31. Dissolved lead in streams. . 83
32. Total iron in streams. . . . 84
33. Dissolved vanadium in streams. 85
34. Suspended sediment in streams. 86
35. pH in streams. . . . . . . . . 87
36. Arsenic in stream-bottom sediments 91
37. Copper in stream-bottom sediments. 92
38. Total Kjeldahl nitrogen in streams 93

v