9624 ‎(2)‎

• UCREFRP Catalog Number: 9624
• Author: Bauch, N. J. and J. B. Bails.
• Title: Water-Quality Characteristics and Ground-Water Quantity of the Fraser River Watershed, Grand County, Colorado 1998-2001.
• USFW Year: 2004.
• USFW - Doc Type: \
• Copyright Material: NO

Contents
Abstract ...................................................... ............................................... 1
Introduction .................................................. ............................................... 2
Purpose and Scope .................................... ............................................... 3
Description of the Fraser River Watershed ............. ............................................... 3
Acknowledgments ...................................... .............................................. 5
Data Collection and Analysis ................................... .............................................. 6
Data Collection .......................................... .............................................. 7
Data Analysis ........................................... .............................................. 7
Laboratory Analysis ................................ .............................................. 7
Statistical Methods ................................ .............................................. 8
Water-Quality Standards ................................ .............................................. 8
Water Quality .................................................. .............................................. 9
Ground Water ........................................... .............................................. 9
Field Properties .................................... .............................................. 9
Dissolved Solids, Major Ions, and Trace Elements .. .............................................13
Nutrients and Dissolved Organic Carbon ........... ............................................. 13
Bacteria, Methylene Blue Active Substances, and Radon-222 ..................................16
Changes Over Time ................................ .............................................17
Surface Water .......................................... .............................................17
Field Properties and Suspended Sediment ......... .............................................18
Dissolved Solids, Major Ions, and Trace Elements .. ............................................. 21
Nutrients and Organic Carbon ..................... ............................................. 22
Fecal Coliform Bacteria ............................ ............................................. 23
Ground-Water Quantity ........................................ ............................................. 24
Summary ...................................................... ............................................. 28
References Cited .............................................. ............................................. 29
Appendix I-Selected Ground-Water-Quality Data for Wells in the Fraser River Watershed, 1998-2001 .... 33
Appendix II-Quality-Control Methods and Analysis ....................................................... 45
Figures
1-3. Maps showing:
1. Location of ground- and surface-water sample-collection sites in the Fraser River
watershed ........................................................................ .........2
2. Land-use/land-cover classifications for the Fraser River watershed ............... .........4
3. Generalized geology of the Fraser River watershed ................................ .........5
4. Piper diagram showing dissolved major-ion composition of ground- and surface-water
samples collected in the Fraser River watershed, 1998-2001 .............................. ........14
5-6. Boxplots showing:
5. Distribution of dissolved nitrate concentrations by aquifer type for wells in the
Fraser River watershed, 1998-2001 ................................................ ....... 15
6. Distribution of dissolved organic carbon concentrations by presence or absence
of individual septic disposal systems for wells in the Fraser Riverwatershed,
1998-2001 ......................................................................... ....... 16
7. Map showing median radon-222 concentrations for wells in the Fraser River watershed,
1998-99 ................................................................................... ....... 18