Open-File Report 2006–1311

U.S. GEOLOGICAL SURVEY
Open-File Report 2006–1311

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Conversion Factors, Datums, Discharge or Flow, Instantaneous Discharge, and Abbreviations and Acronyms

Conversion Factors

Multiply By To obtain
acre 4,047 square meter
acre-foot (acre-ft) 1,233 cubic meter
centimeter (cm) 0.10 millimeter
cubic foot per second (ft3/s) 0.02832 cubic meter per second
foot (ft) 0.3048 meter
inch (in.) 2.54 centimeter
mile (mi) 1.609 kilometer
square foot 0.09290 square meter
square mile (mi2) 2.590 square kilometer

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

°F=(1.8×°C)+32

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

°C=(°F-32)/1.8

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 1927
(NAD 27) and the North American Datum of 1983 (NAD 83).

Discharge or Flow

The rate that matter passes through a cross section of a stream channel or other water body per unit of time. The term commonly refers to the volume of water (including, unless otherwise stated, any sediment or other constituents suspended or dissolved in the water) that passes a cross section in a stream channel, flume, weir, canal, pipeline, etc., within a given period of time (cubic feet per second).

Instantaneous Discharge

The discharge at a particular instant of time (see also “Discharge”).

Abbreviations and Acronyms

Abbreviations and Acronyms Meaning
BM bench mark
DGPS Differential Global Positioning System
DRI Desert Research Institute
FWS U.S. Fish and Wildlife Service
GPS global positioning system
LVVWD Las Vegas Valley Water District
MVID Muddy Valley Irrigation District
MVWD Moapa Valley Water District
NDWR Nevada Division of Water Resources
NGS National Geodetic Survey
NPC Nevada Power Company
NWIS National Water Information System
OPUS Online Positioning User Service
Reclamation Bureau of Reclamation
RM reference mark
RP reference point
SNWA Southern Nevada Water Authority
UNAES University of Nevada Agricultural Experiment station
USGS U.S. Geological Survey
UTM Universal Transverse Mercator

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