Conversion Factors and Datums

Inch/Pound to SI

Multiply	By	To obtain
Length
inch (in.)	2.54	centimeter (cm)
foot (ft)	0.3048	meter (m)
mile (mi)	1.609	kilometer (km)
Area
acre	0.4047	hectare (ha)
Volume
acre-foot (acre-ft)	1,233	cubic meter (m3)
Flow rate
foot per day (ft/d)	0.3048	meter per day (m/d)
foot per year (ft/yr)	0.3048	meter per year (m/yr)
gallon per minute (gal/min)	0.06309	liter per second (L/s)
mile per hour (mi/h)	1.609	kilometer per hour (km/h)
Energy
calorie (cal)	4.184	joule (J)

SI to Inch/Pound

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)
Volume
liter (L)	0.2642	gallon (gal)
Flow rate
meter per second (m/s)	3.281	foot per second (ft/s)
Mass
gram (g)	0.03527	ounce, avoirdupois (oz)
kilogram (kg)	2.205	pound avoirdupois (lb)
Pressure
kilopascal (kPa)	0.01	bar
kilopascal (kPa)	0.1450	pound-force per square inch (lb/in2)

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

°F=(1.8×°C)+32.

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25°C).

Concentrations of chemical constituents in water are given in milligrams per liter (mg/L) or micrograms per liter (µg/L).

Datums

Vertical coordinate information is referenced to the National Geodetic Vertical Datum of 1929 (NGVD29). For the purpose of this publication, the term sea level is used to represent the 0-foot altitude as referenced to NGVD29. The conversion between NGVD29 and the commonly used North American Vertical Datum of 1988 (NAVD88) varies spatially; for conversions the reader is directed to either the National Geodetic Survey website for VERTCON at http://www.ngs.noaa.gov/TOOLS/Vertcon/vertcon.html or the U.S. Army Corps of Engineers website for Corpscon at http://crunch.tec.army.mil/software/corpscon/corpscon.html.

Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD27). The conversion between NAD27 and the commonly used North American Datum of 1983 (NAD83) varies spatially; for conversions, the reader is directed to either the National Geodetic Survey website for NADCON at http://www.ngs.noaa.gov/TOOLS/Nadcon/Nadcon.html or the U.S. Army Corps of Engineers website for Corpscon at http://crunch.tec.army.mil/software/corpscon/corpscon.html.

Elevation, as used in this report, refers to distance above the vertical datum. Vertical coordinate information for historical data collected and stored as NAVD88 have been converted to NGVD29 for this publication. Horizontal coordinate information for historical data collected and stored as NAD83 have been converted to NAD27 for this publication.

A local vertical datum, called the Upper Klamath Lake Vertical Datum (UKLVD), established by the Bureau of Reclamation, is often used for reporting elevation, especially with regard to the stage of Upper Klamath Lake. The conversions from UKLVD to the national datums NAVD88 and NGVD29 vary spatially and are presently not well defined for much of the Wood River Valley. For the purpose of this publication, the conversion used is UKLVD – 1.78 = NGVD29 (all values are in feet) (Source: William Wood, Bureau of Reclamation, written commun., 2007).

Abbreviations and Acronyms

AGKO	Agency Lake AgriMet station
BLM	Bureau of Land Management
CH4	methane
Cl	chloride
CO2	carbon dioxide
DBP	disinfection by-products
DEM	digital elevation models
DIN	dissolved inorganic nitrogen
DKN	dissolved Kjeldahl nitrogen
DNRA	dissimilatory nitrate reduction to ammonium
DO	dissolved oxygen
DOC	dissolved organic carbon
ET	evapotranspiration
GF/F	glass fiber filter
HAA	haloacetic acid
HCl	hydrochloric acid
H2S	hydrogen sulfide
H2SO4	sulfuric acid
KFLO	Klamath Falls, Oregon AgriMet station
LiDAR	Light Detection and Ranging
mg-C/L	milligrams of carbon per liter
mg-N/L/m2/h	milligrams of nitrogen per liter per square meter per hour
N2	nitrogen gas
NH3	un-ionized ammonia
NH4+	ammonium
NO	nitric oxide
N2O	nitrous oxide
NO2+NO3	nitrite-plus-nitrate
NO3	nitrate
O2	oxygen
PAR	photosynthetically active radiation
SC	specific conductance
SRP	soluble reactive phosphorus
TKN	total Kjeldahl nitrogen
TN	total nitrogen
TNC	The Nature Conservancy
TP	total phosphorus
µg-C/L	micrograms of carbon per liter
µg-Cl/L	micrograms of chloride per liter
µg-Fe/L	micrograms of iron per liter
µg-N/L	micrograms of nitrogen per liter
µg-P/L	micrograms of phosphorus per liter
µg-Mn/L	micrograms of manganese per liter
µL	microliter
USEPA	U.S. Environmental Protection Agency
USFWS	U.S. Fish and Wildlife Service
USGS	U.S. Geological Survey
Ws	wind speed