WSP08083

• File Number: 8220.114.I
• Description: Dolores Participating Project
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 1/1/1977
• Author: USGS
• Title: Field Screening of Water/Soil/Bottom Sediment and Biota Associated with Irrigation Drainage in the Dolores Project and Mancos River Basin - Southwestern Colorado - 1994
• Water Supply Pro - Doc Type: Report/Study

TABLES

1. Sampling sites and samples collected for the 1994 field study............................................................................... 8
2. Onsite measurements and chemical analyses of water samples collected at streams in the Dolores Project
and the Mancos River Basin, 1994 ......................................................................................................................... 27
3. Onsite measurements and chemical analyses of water samples collected at ponds in the Dolores Project
and the Mancos River Basin, 1994 ................................................................................,........................................ 32
4. Selenium and mercury concentrations in bottom-sediment samples collected from ponds and selenium
concentrations in shallow soil samples in the Dove Creek area of the Dolores Project and in the Mancos

River Basin, 1994...... ............ ....... .............................................. .................... ............ ....... ..... ..... ............... ............. 33
5. Selenium concentrations in biological samples and mercury concentrations in selected fish samples
collected from streams in the Dolores Project and the Mancos River Basin, 1994................................................ 33
6. Selenium concentrations in biological samples and mercury concentrations in selecfed bird-tissue samples
collected at ponds in the Dolores Project and the Mancos River Basin. 1994 ....................................................... 38
7. Aquatic hazard assessment of selenium for ponds in the Dove Creek area and the Mancos River Basin ............. 43

CONVERSION FACTORS AND ACRONYMS

Muldply

By

To obtain

Leogtb

foot(ft)
inch (in.)
inch (in,)
mile (mi)

0.3048
2.54
25.4
1.609

meter
centimeter
millimeter
kilometer

Area

acre
acre

4.047
0.4047

square meter
hectare

Volume

acre-foot (acre-Il)
acre-foot per year (acre-ftlyr)

1.233
1,233

cubic meter
cubic meter per year

Temperature in degrees Celsius (OC) may be converted to degrees Fahrenheit (OF) as follows:
OF = (1.8 x oc) + 32

Concentrations of chemical constituents in water are given either in milligrams per liter (mgIL) or micrograms
per liter (l-1g1L).
Concentrations of chemical constituents in bottom sediment, soil, and biota are give in micrograms per gram
(l-1g1g).

To convert dry-weight concentrations to wet-weight concentrations for biological samples, the equation is:
wet weight = dry weight [I-(percent moisture)/IOO].

Acronyms
Bureau of Reclamation (BOR)
Montezuma Valley Irrigation Company (MVIC)
National Irrigation Water Quality Program (NIWQP)
U.S. Fish and Wildlife SelVice (USFWS)

IV CONTENTS