Database fields in category Site characteristics (details)

	Distribution maps
Label	Lower 48	Alaska	Hawaii	Statistics	Description
`PHOTOS`					Names of photographs taken at collection site
`FLDPLNWID`					Width of flood plain at sample collection site
`RELIEF`					Relief in drainage basin from which sample was collected
`FORMATION`					Code or name of geologic formation in which sample area was located
`SGEOUNIT`					Geologic unit at sample site
`ALK`					Total alkalinity of water at sample site
`O_DISS`					Dissolved oxygen (ppm) in water at sample site
`SCIN`					Gamma activity at sample site
`AIRTEMP`					Air temperature at time of collection
`WTRTEMP`					Water temperature at time of collection
`COND`					Conductivity of water at sample site
`STRFLOW`					Stream velocity (m/s) at sample collection site
`STR_CHAN`					Describes whether stream is depositing or eroding at collection site
`WEATH`					Weather observations at time of sample collection
`VEG_DENS`					Density of vegetation around sample site
`ROCK_TYPE`					Rock type in area of sample collection
`ROCK_COL`					Rock color in area of sample collection