# Hydrogeologic Framework and Simulation of Ground-Water Flow and Travel Time in the Shallow Aquifer System in the Area of Naval Support Activity Memphis, Millington, Tennessee

CONVERSION FACTORS, VERTICAL DATUM, AND WELL-NUMBERING SYSTEM

Multiply
By
To obtain
inch (in.)
25.4
millimeter
inch per year (in/yr)
25.4
millimeter per year
foot (ft)
0.3048
meter
foot per day (ft/d)
0.3048
meter per day
foot per year (ft/yr)
0.3048
meter per year
mile (mi)
1.609
kilometer
acre
0.4047
square hectometer
square foot (ft2)
0.0929
square meter
square mile (mi2)
2.59
square kilometer
cubic foot per second (ft3/s)
0.02832
cubic meter per second
cubic foot per day (ft3/d)
0.02832
cubic meter per day
gallon per minute (gal/min)
0.06308
liter per second

Temperature in degrees Fahrenheit (oF) can be converted to degrees Celsius as follows: oC = 5/9 x (oF - 32)
Transmissivity: In this report transmissivity is expressed as foot squared per day (ft2/d)--The standard unit for transmissivity (T) is cubic foot per day per square foot times foot of aquifer thickness "[(ft3/d)/ft2]ft" or cubic meters per day per square meter times meter of aquifer thickness "[(m3/d)/m2]m." These mathematical expressions reduce to foot squared per day "ft2/d" or meter squared per day "m2/d."

Sea level: In this report "sea level" refers to the National Geodetic Vertical Datum of 1929--a geodetic datum derived from a general adjustment of the first-order level nets of the United States and Canada, formerly called Sea Level Datum of 1929.

Tennessee District well-numbering system: Wells in Tennessee are identified according to the numbering system that is used by the U.S. Geological Survey, Water Resources Division. The well number consists of three parts:

(1) an abbreviation of the name of the county in which the well is located;

(2) a letter designating the 7 1/2-minute topographic quadrangle on which the well is plotted; quadrangles are lettered from left to right across the county beginning in the southwest corner of the county; and

(3) a number generally indicating the numerical order in which the well was inventoried.

For example, Sh:U-99 indicates that the well is located in Shelby County on the "U" quadrangle and is identified as well 99 in the numerical sequence.