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Scientific Investigations Report 2007–5261

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5261

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Conversion Factors, Datums, and Acronyms

Conversion Factors

Multiply By To obtain
acre 4,047 square meter (m2)
acre 0.4047 hectare (ha)
acre-foot (acre-ft) 1,233 cubic meter (m3)
acre-feet per year (acre-ft/yr) 1,233 cubic meter per year (m3/yr)
calorie 4.184 joule (J)
calories per second per square foot 45.045 watt per square meter (W/m2)
cubic foot per day (ft3/d) 0.02832 cubic meter per day (m3/d)
foot (ft) 0.3048 meter (m)
foot per day (ft/d) 0.3048 meter per day (m/d)
foot per foot (ft/ft) 0.3048 meter per meter (m/m)
foot per mile (ft/mi) 0.1894 meter per kilometer (m/km)
foot squared per day (ft2/d) 0.0929 meter squared per day (m2/d)
inch (in.) 25.4 millimeter (mm)
mile (mi) 1.609 kilometer (km)
square mile (mi2) 2.590 square kilometer (km2)

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

°C=(°F-32)/1.8.

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

°F=(1.8×°C)+32.

Datums

Vertical coordinate information is referenced to the North American Vertical Datum of 1929 (NAVD of 1929).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83) unless otherwise stated.

Altitude, as used in this report, refers to distance above the vertical datum.

Acronyms

Acronym Definition
AMT audio-magnetotelluric
AZMET Arizona Meteorological Network
BARCAS Basin and Range Carbonate-rock aquifer system
BCM Basin Characterization Model
CIMIS California Irrigation Management Information System
CYSU coarse-grained younger sedimentary rock unit
DRI Desert Research Institute
DVRFS Death Valley Regional Flow System
ET evapotranspiration
FYSU fine-grained younger sedimentary rock unit
HA hydrographic area
HGU hydrogeologic unit
IU intrusive-rock unit
LCU lower carbonate-rock unit
LSCU lower siliciclastic-rock unit
MODIS Moderate Resolution Imaging Spectroradiometer
MSAVI modified soil-adjusted vegetation index
MSU Mesozoic sedimentary rock unit
MT magnetotelluric
MX wells drilled as part of the U.S. Air Force missile-siting investigation
NDWR Nevada Division of Water Resources
NV Nevada
OSU older sedimentary rock unit
PL public law
PRISM Parameter-Elevation Regressions on Independent Slopes Model
SDWIS Safe Drinking Water Information System
SIR Scientific Investigations Report
SPV Spring Valley
SWReGAP Southwest Regional Gap Analysis Project
TM Thematic Mapper
UCU upper carbonate-rock unit
USCU upper siliciclastic-rock unit
USEPA U.S. Environmental Protection Agency
USGS U.S. Geological Survey
VFU volcanic flow unit
VTU volcanic tuff unit

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