EDSM: EDSM water quality data
In sbashevkin/discretewq: Integrated Dataset of Discrete Water Quality in the San Francisco Estuary

EDSM	R Documentation

EDSM water quality data

Water quality data from the United States Fish and Wildlife Service Enhanced Delta Smelt Monitoring Program.

EDSM

a tibble with 30,957 rows and 14 variables

Source: Name of the source dataset.
Station: Station where sample was collected. This represents an identifier for the unique EDSM target location. Multiple tows (and water quality samples) were often collected at each target location on a day.
Latitude: Latitude in decimal degrees. This is the actual latitude of the sample collection, not the latitude of the target location.
Longitude: Longitude in decimal degrees. This is the actual longitude of the sample collection, not the longitude of the target location.
Field_coords: Were lat/long coordinates collected in the field (TRUE), or do they represent the location of a fixed station (FALSE)?
Date: Date sample was collected.
Datetime: Date and time of sample collection.
Depth: Bottom depth (m).
Tide: Tidal stage.
Secchi: Secchi depth (cm).
Temperature: Temperature in °C.
Temperature_bottom: Temperature (°C) at bottom.
Conductivity: Specific conductance (\muS cm^-1) at surface.
DissolvedOxygen: Dissolved oxygen (mg/L) at surface.
DissolvedOxygen_bottom: Dissolved oxygen (mg/L) at bottom.
Notes: Comments.

More metadata and information on methods are available here.