Acronyms and Abbreviations

Units of Measurement

Distance
ft — foot/feet
m — meters
Flow Rates
cm/yr — centimeters per year
ft/day — feet per day
ft/yr — feet per year
m/day — meter(s) per day
mm/day — millimeter(s) per day
mm/yr — millimeter(s) per year
Area and Volume
ft²/day — square feet per day
ft³/day — cubic feet per day
m²/day — square meters per day
m³/day — cubic meters per day

Hydrogeological Parameters

Kₓ — hydraulic conductivity in x direction (m/day or ft/day)
Kᵧ — hydraulic conductivity in y direction (m/day or ft/day)
Kᵤ — hydraulic conductivity in z direction (m/day or ft/day)
Sₛ — specific storage (m⁻¹ or ft⁻¹)
Sᵧ — specific yield

Technical Terms

BC — boundary condition
C — constant-head boundary
ET — evapotranspiration
GUI — graphical user interface
ID — identification
ZOR — zone of relaxation
2-D — two-dimensional/two dimensions
3-D — three-dimensional/three dimensions

File Extensions

.BLN — boundary line file (ITASCA codes)
.BUD — budget file
.DAC — FEFLOW ASCII result file
.DAT — data file
.DBF — dBASE file (shapefile component)
.DXF — AutoCAD Drawing Exchange Format file
.FEL — MINEDW data file list
.FEM — FEFLOW ASCII data file
.FLW — flow file
.LAK — pit-lake file
.OUT — output file
.PLB — simulated head output file
.PLT — ASCII file
.PRJ — project file
.PST — MINEDW geometry file
.SEP — seepage file
.SHP — shapefile format
.SHX — index file (shapefile component)
.STL — stereolithography file
.SVG — scalable vector graphic format
.VRML — Virtual Reality Modeling Language format

Software and Organizations

3DEC — Three-Dimensional Distinct Element Code (ITASCA)
FEFLOW — Finite Element subsurface FLOW system
FEMFLOW3D — United States Geological Survey code/program
FLAC3D — Fast Lagrangian Analysis of Continua in Three Dimensions (ITASCA)
MINEDW — Mine Dewatering software (ITASCA)
OpenGL — Open Graphics Library
USGS — United States Geological Survey