Scientific Investigations Report 2007–5007

Scientific Investigations Report 2007–5007

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Conversion Factors, Datums, and Abbreviations and Acronyms

Conversion Factors

Multiply By To obtain
acre 4,047 square meter
acre-foot per year (acre-ft/yr) 1,233 cubic meter per year
cubic foot (ft3) 0.02832 cubic meter
cubic foot per second (ft3/s) 0.02832 cubic meter per second
gallon per day (gal/d) 0.003785 cubic meter per day
inch (in.) 2.54 centimeter
inch (in.) 25.4 millimeter
inch per year (in/yr) 2.54 centimeter per year
foot (ft) 0.3048 meter
mile (mi) 1.609 kilometer
million gallons per day (Mgal/d) 0.04381 cubic meter per second
section (640 acres or 1 square mile) 259.0 square hectometer
square foot (ft2) 0.09290 square meter
square inch (in2) 6.452 square centimeter
square mile (mi2) 2.590 square kilometer

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


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



Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).

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

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

Abbreviations or Acronyms

Abbreviation and Acronym Meaning
AET actual evapotranspiration
CRBG Columbia River Basalt Group
DEM digital elevation model
DOA Washington State Department of Agriculture
DPM Deep Percolation Model
GIS Geographic Information System
HRU Hydrologic Response Unit
I/P ratio of irrigation to precipitation
km kilometer
LULC land use and land cover
m meter
MMS Modular Modeling System
PRMS Precipitation-Runoff Modeling System
PWS public water supply
R/P ratio of recharge to precipitation
R/T ratio of recharge to total water input
Reclamation Bureau of Reclamation
S quantity of water that root/soil zone can hold
SAT quantity of water above TWAC
SOAC Systems Operations Advisory Committee
T total water input: precipitation plus irrigation
TAWC total available water capacity
TWSA total water supply available
USGS U.S. Geological Survey
WaDOE Washington State Department of Ecology
WRIA Washington State Water Resource Inventory Area
WY water year
YN Yakama Nation

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