Conversion Factors, Datums, and Abbreviations and Acronyms
Conversion Factors
| Multiply |
By |
To obtain |
| Length |
| inch (in.) |
2.54 |
centimeter (cm) |
| inch (in.) |
25.4 |
millimeter (mm) |
| foot (ft) |
0.3048 |
meter (m) |
| mile (mi) |
1.609 |
kilometer (km) |
| Area |
| acre |
4,047 |
square meter (m2) |
| acre |
0.4047 |
hectare (ha) |
| acre |
0.4047 |
square hectometer (hm2) |
| acre |
0.004047 |
square kilometer (km2) |
| square foot (ft2) |
929.0 |
square centimeter (cm2) |
| square foot (ft2) |
0.09290 |
square meter (m2) |
| square mile (mi2) |
259.0 |
hectare (ha) |
| square mile (mi2) |
2.590 |
square kilometer (km2) |
| Volume |
| gallon (gal) |
3.785 |
liter (L) |
| gallon (gal) |
0.003785 |
cubic meter (m3) |
| gallon (gal) |
3.785 |
cubic decimeter (dm3) |
| cubic foot (ft3) |
0.02832 |
cubic meter (m3) |
| acre-foot (acre-ft) |
1,233 |
cubic meter (m3) |
| acre-foot (acre-ft) |
0.001233 |
cubic hectometer (hm3) |
| Flow rate |
| gallon per minute (gal/min) |
0.0631 |
Liter per second (L/s) |
| acre-foot per year (acre-ft/yr) |
1,233 |
cubic meter per year (m3/yr) |
| acre-foot per year (acre-ft/yr) |
0.001233 |
cubic hectometer per year (hm3/yr) |
| foot per second (ft/s) |
0.3048 |
meter per second (m/s) |
| foot per year (ft/yr) |
0.3048 |
Meter per year (m/yr) |
| cubic foot per second (ft3/s) |
0.02832 |
cubic meter per second (m3/s) |
| inch per year (in/yr) |
25.4 |
millimeter per year (mm/yr) |
| Specific capacity |
| gallon per minute per foot
[(gal/min)/ft)] |
0.2070 |
liter per second per meter [(L/s)/m] |
| Hydraulic conductivity |
| foot per day (ft/d) |
0.3048 |
meter per day (m/d) |
| Transmissivity* |
| foot squared per day (ft2/d) |
0.09290 |
meter squared per day (m2/d) |
| Leakance |
| foot per day per foot [(ft/d)/ft] |
1 |
meter per day per meter |
Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:
°C=(°F-32)/1.8
*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 National Geodetic Vertical Datum of 1929 (NGVD 29).
Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD 27).
Elevation, as used in this report, refers to distance above the vertical datum.
Abbreviations and Acronyms
|
| AET |
actual evapotranspiration |
| CDWR |
California Department of Water Resources |
| DRN |
MODFLOW drain package |
| ET |
evapotranspiration |
| EVT |
MODFLOW evapotranspiration package |
| GHB |
MODFLOW general head boundaries package |
| GPS |
global positioning system |
| HRU |
hydrologic response unit |
| KBRA |
Klamath Basin Restoration Agreement |
| MODFLOW |
MODular three-dimensional finite-difference groundwater FLOW model |
| OWRD |
Oregon Water Resources Department |
| PET |
potential evapotranspiration rate |
| PRMS |
precipitation-runoff modeling system |
| SBOT |
streambed bottom elevation parameter |
| TID |
Tulelake Irrigation District |
| USGS |
U.S. Geological Survey |
|
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U.S. Department of the Interior |
U.S. Geological Survey