WSP02811

• File Number: 8200.766
• Description: Gunnison River General
• State: CO
• Basin: Gunnison
• Water Division: 4
• Date: 1/1/1991
• Author: USGS
• Title: Reconnaissance Investigation of Water Quality-Bottom Sediment-and Biota Associated with Irrigation Drainage - Gunnison and Uncompahgre River Basins and Sweitzer Lake - West Central Colorado
• Water Supply Pro - Doc Type: Report/Study

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Figures 9-20. Graphs showing--Continued:
16. Summary statistics of selenium concentrations in
whole-body fish samples---------------------------- 52
17. Mean concentrations of selenium in channel catfish
samples from Sweitzer Lake (site 7)---------------- 54
lB. Mean concentrations of selenium in biota samples
from Sweitzer Lake (site 7) and the Gunnison
River at Escalante State Wildlife Area (site 10)--- 56
19. Summary statistics of selenium concentrations in
bird samples from Sweitzer Lake (site 7) and the
Gunnison River at Escalante State Wildlife Area
(site 10)------------------------------------------ 57
20. Summary statistics of mercury concentrations in
whole-body fish samples---------------------------- 62

Table 1.
2.
3.
4.
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7.
B.
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11.

TABLES

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Summary of selected total trace-element concentrations for
Gunnison River at Delta, Uncompahgre River at Ridgway,
and Uncompahgre River at Delta------------------------------ 21
Summary of selected trace-element concentrations for
streamflow gaging station 09152500, Gunnison River near
Grand Junction---------------------------------------------- 22
Summary of selected water-quality data for samples
collected from alluvial aquifers and aquifers in the
Dakota Sandstone in the Uncompahgre River valley------------ 25
Summary of selected water-quality data for samples
collected from the Mancos Shale in west-central Colorado---- 26
Geochemical data for selected trace elements in soils in
irrigated areas near Delta and in the Grand Valley---------- 27
Mean selenium concentrations in flesh and liver samples
in fish from Sweitzer Lake, 1974 and 1977------------------- 27
Selected trace-element data for whole-body fish samples
collected from the Uncompahgre River and Ridgway
Reservoir in 1987-88---------------------------------------- 28
Water-quality constituents analyzed in water, bottom
sediment, and biota samples--------------------------------- 30
Sampling sites and types of samples collected----------------- 31
Sample-collection schedule for water, bottom sediment, and
biota, November 1987 and January, March, and July 198B------ 32
Water-use classifications and water-quality standards for
selected constituents of the Colorado Department of Health,
Water Quality Control Commission, for the Gunnison and
Uncompahgre Rivers and for Sweitzer Lake-------------------- 37
12. Baseline geochemical data for soils in the Western United
States and for bottom-sediment samples collected for nine
irrigation-drainage reconnaissance investigations----------- 47
13. Range of concentrations of selected trace elements in
composite whole-body fish samples--------------------------- 53
14. Range of concentrations of selected trace elements in
invertebrate and aquatic plant samples---------------------- 55

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