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Scientific Investigations Report 2012–5002


Evaluation of Long-Term Water-Level Declines in Basalt Aquifers near Mosier, Oregon


Conversion Factors, Datums, and Abbreviations and Acronyms


Inch/Pound to SI


Multiply By To obtain
inch (in.) 2.54 centimeter (cm)
foot (ft) 0.3048 meter (m)
mile (mi) 1.609 kilometer (km)
Acre 4,047 square meter (m2)
square mile (mi2) 640 acre
square foot (ft2) 0.09290 square meter (m2)
acre-foot (acre-ft) 43,560 cubic foot (ft3)
acre-foot per yr (acre-ft/yr) 119.3 cubic foot per day (ft3/d)
foot per day (ft/d) 0.3048 meter per day (m/d)
foot per year (ft/yr) 0.3048 meter per year (m/yr)
gallons per minute (gal/min) 192.5 cubic foot per day (ft3/d)
cubic foot per second (ft3/s) 86,400 cubic foot per day (ft3/d)
foot squared per day (ft2/d) 0.09290 meter squared per day (m2/d)

SI to Inch/Pound


Multiply By To obtain
centimeter (cm) 0.3937 inch (in.)
meter (m) 3.281 foot (ft)
millimeter (mm) 0.03937 inch (in.)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:


°F=(1.8 × °C)+32.


*Transmissivity: The standard unit for transmissivity is cubic foot per day per square foot times foot of aquifer thickness [(ft3/d)/ft2]ft. In this report, the mathematically reduced form, foot squared per day (ft2/d), is used for convenience.


Datums


Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD88).


Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD27), utilizing the NAD_1927_StatePlane_Oregon_North_FIPS_3601 projection.


Elevation, as used in this report, refers to distance above the vertical datum in a strict sense when associated with a value and in a broad sense when not associated with a value.


Abbreviations and Acronyms


AR artificial recharge
ASR aquifer storage and recovery
CLU Common Land Unit
CRBG Columbia River Basalt Group
HFB Horizontal Flow Barrier
LPF Layer Property Flow
MRC master recession curve
OWRD Oregon Water Resources Department
PART Stream hydrograph separation computer program that uses the streamflow partitioning method
RM river mile
RORA Streamflow recession analysis computer program based on the Rorabaugh method
SWCD Soil and Water Conservation District
USGS U.S. Geological Survey
WRIS Water Rights Information System

First posted March 1, 2012

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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