Conversion Factors, Datums, and Abbreviations and Acronyms
Conversion Factors
Multiply |
By |
To obtain |
Length |
centimeter (cm) |
0.3937 |
inch (in.) |
millimeter (mm) |
0.03937 |
inch (in.) |
meter (m) |
3.281 |
foot (ft) |
kilometer (km) |
0.6214 |
mile (mi) |
Area |
square meter (m2) |
10.76 |
square foot (ft2) |
square kilometer (km2) |
0.3861 |
square mile (mi2) |
Volume |
cubic meter (m3) |
0.0008107 |
acre-foot (acre-ft) |
cubic meter (m3) |
35.31 |
cubic foot (ft3) |
cubic meter (m3) |
1.308 |
cubic yard (yd3) |
liter (L) |
0.03531 |
cubic foot (ft3) |
Flow rate |
cubic meter per second (m3/s) |
35.31 |
cubic foot per second (ft3/s) |
cubic meter per year (m3/yr) |
1.308 |
cubic yard per year (yd3/yr) |
meter per second (m/s) |
3.281 |
foot per second (ft/s) |
meter per year (m/yr) |
3.281 |
foot per year (ft/yr) |
millimeter per year (mm/yr) |
0.0397 |
inch per year (in/yr) |
kilogram per second (kg/s) |
2.205 |
pound per second (lb/s) |
kilogram per meter per second [(kg/m)/s] |
4.486 |
pound avoirdupois per foot per second [(lb/ft)/s] |
Mass |
kilogram (kg) |
2.205 |
pound avoirdupois (lb) |
Datums
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).
Elevation, as used in this report, refers to the distance above the vertical datum.
Abbreviations and Acronyms
BAGS |
Bedload Assessment in Gravel-bedded Streams |
BLM |
Bureau of Land Management |
FPkm |
flood-plain kilometer |
GIS |
geographic information system |
GPS |
global positioning system |
HEC-RAS |
Hydrologic Engineering Center’s River Analysis System |
ka |
kiloannum, a unit of time equal to one thousand years |
LIDAR |
Light Detection and Ranging |
MLLW |
mean lower low water |
NAIP |
National Agriculture Imagery Program |
Rkm |
river kilometer |
RMSE |
root mean square error |
RTK |
real-time kinematic |
USFS |
U.S. Forest Service |
USGS |
U.S. Geological Survey |
UTM |
Universal Transverse Mercator |
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