Georgia Coastal Ecosystems LTER Data Set Details

Jump to Files

GCE-LTER Data Set Summary

Accession:

GND-GCED-1802

Research Theme:

Groundwater Hydrology (Directed Study)

Contributors:

Christopher B. Craft, Dontrece Smith, Sarah Widney, Wade Sheldon

Title:

Continuous groundwater well temperature, salinity and water level measurements at the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) site from May 2014 to February 2018

Abstract:

The Georgia Coastal Ecosystems LTER Seawater Addition Long-Term Experiment (SALTEx) is a large-scale field experiment designed to simulate saltwater intrusion in a tidal freshwater wetland to predict how chronic (Press) and acute (Pulse) salinization will affect this and other tidal freshwater ecosystems. In order to characterize groundwater salinity, temperature, and plot flooding following experimental manipulation, unvented water pressure, temperature and conductivity were continuously measured in a PVC groundwater well installed at the SALTEx site. Measurements were made at the bottom of the well using a submerged Schlumberger CTD-Diver logger every 15 minutes from 30-May-2014 to 14-Feb-2018. In February 2016 a second CTD-Diver was deployed near the top of the well. Data were downloaded from the loggers using Diver Office communication software, then imported into MATLAB for post-processing, quality control and documentation. Raw, unvented pressure readings were corrected for atmospheric pressure and sensor height from the bottom of the well to generate corrected pressure readings, then water level, salinity and density were calculated from the measured variables using UNESCO algorithms. These data were collected as part of the Georgia Coastal Ecosystems LTER SALTEx project (http://gce-lter.marsci.uga.edu/public/app/send_project_eml.asp?id=73), and will be updated annually.

DOI:

10.6073/pasta/bdde791bb928c451261a2c3e1561ff56

Key Words:

droughts, estuaries, floods, groundwater, hydrology, pressure, salinity, SALTEx, temperature, water level, water table

LTER Core Area:

Disturbance Patterns

Research Themes:

GCE2 Q1 - External Forcing, GCE2 Q3 - Longitudinal Gradients, GCE3 Area3 - Responses to Salinity and Inundation, Groundwater Hydrology, Hydrography/Hydrology

Study Period:

30-May-2014 to 14-Feb-2018

Study Sites:

SALTEx -- SALTEx Research Site, Champney Island, Georgia, USA

» Download Geographic Coverage: Google Earth

Project References:

SALTEx - Seawater Addition Long Term Experiment

Publications:

Herbert, E., Schubauer-Berigan, J.P. and Craft, C.B. 2018. Differential effects of chronic and acute simulated seawater intrusion on tidal freshwater marsh carbon cycling. Biogeochemistry. 138:137–154. (DOI: 10.1007/s10533-018-0436-z)

Downloads:

Data Table: GND-GCED-1802_Bottom (Observations from the data logger installed at the well bottom from May 2014 to Feb 2018, 130182 records)

Access: Public (released 01-Dec-2018)

Metadata: Text (ESA FLED), XML (Ecological Metadata Language)

Data Formats: Spreadsheet (CSV) [25877.59kb], Text File [22440.92kb], MATLAB (GCE Toolbox) [46913.30kb], MATLAB (Variables) [44951.63kb], Text Report [23282.05kb]

Column List:(display)

Column	Name	Units	Type	Description
1	Date	yyyy-mm-dd HH:MM:SS - GMT	string	Fractional MATLAB serial day (based on 1 = January 1, 0000)
2	Year	YYYY	integer	Calendar year
3	Month	M	integer	Calendar month
4	Day	D	integer	Calendar day
5	Hour	hh	integer	Hours - GMT
6	Minute	mm	integer	Minutes
7	Hammock	none	string	Hammock id where well is installed
8	Location	none	string	Location code of well in the GCE locations database
9	Longitude	degrees	floating-point	Geographic longitude in decimal degrees
10	Latitude	degrees	floating-point	Geographic latitude in decimal degrees
11	Sensor	none	string	Sensor ID (serial number)
12	Sensor_Elevation	m	floating-point	Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth
13	Flag_Sensor_Elevation	none	string	QA/QC flags for Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth (flagging criteria, where "x" is Sensor_Elevation: flag_inlist(Location, "HN_i_1_WELL_LOC_0, HN_i_1_WELL_LOC_1, PC_i_29_WELL_LOC_0")="E")
14	Pressure	Pa	floating-point	Groundwater pressure
15	Flag_Pressure	none	string	QA/QC flags for Groundwater pressure (flagging criteria, where "x" is Pressure: x<0="I", x>196133="Q", flag_well_pumping(x, [1 12], 0.4)="P")
16	Pressure_Corrected	Pa	floating-point	Groundwater well pressure corrected for atmospheric pressure using the equation: Pressure - Pressure_Atm
17	Flag_Pressure_Corrected	none	string	QA/QC flags for Groundwater well pressure corrected for atmospheric pressure using the equation: Pressure - Pressure_Atm (flagging criteria, where "x" is Pressure_Corrected: x<0="I", x>196133="Q", flag_well_pumping(x, [1 12], 0.4)="P", manual)
18	Depth	m	floating-point	Water depth calculated from corrected water pressure and latitude using a UNESCO algorithm
19	Flag_Depth	none	string	QA/QC flags for Water depth calculated from corrected water pressure and latitude using a UNESCO algorithm (flagging criteria, where "x" is Depth: manual)
20	Depth_Corrected	m	floating-point	Water depth calculated from corrected well pressure and geographic latitude using UNESCO algorithms
21	Flag_Depth_Corrected	none	string	QA/QC flags for Water depth calculated from corrected well pressure and geographic latitude using UNESCO algorithms (flagging criteria, where "x" is Depth_Corrected: x<0="Q", manual)
22	Water_Level	m	floating-point	Water level relative to NAVD88 datum calculated from sensor elevation and corrected water depth above the sensor
23	Flag_Water_Level	none	string	QA/QC flags for Water level relative to NAVD88 datum calculated from sensor elevation and corrected water depth above the sensor (flagging criteria, where "x" is Water_Level: manual)
24	Pressure_Atm	Pa	floating-point	Barometric pressure (15 minute average)
25	Flag_Pressure_Atm	none	string	QA/QC flags for Barometric pressure (15 minute average) (flagging criteria, where "x" is Pressure_Atm: x<0="I", x>106000="I", x<96000="Q", x>105000="Q", manual)
26	Temp_Water	°C	floating-point	Groundwater temperature
27	Flag_Temp_Water	none	string	QA/QC flags for Groundwater temperature (flagging criteria, where "x" is Temp_Water: x<0="I", x<10="Q", x>40="Q", x>100="I", flag_well_pumping(Pressure, [1 36], 0.5)="P")
28	Conductivity	mS/cm	floating-point	Groundwater conductivity
29	Flag_Conductivity	none	string	QA/QC flags for Groundwater conductivity (flagging criteria, where "x" is Conductivity: x<0="I", flag_well_pumping(Pressure, [1 36], 0.5)="P")
30	Salinity	PSU	floating-point	Water salinity calculated from conductivity, temperature and depth using UNESCO algorithms
31	Flag_Salinity	none	string	QA/QC flags for Water salinity calculated from conductivity, temperature and depth using UNESCO algorithms (flagging criteria, where "x" is Salinity: manual)
32	Density	kg/m^3	floating-point	Groundwater density as a function of salinity, temperature and pressure, calculated from Sigma-t (i.e. specific gravity anomaly calculated using ''swstate'' in the WHOI Oceans toolbox, based on UNESCO algorithms) as Density = Sigma-t + 1000
33	Flag_Density	none	string	QA/QC flags for Groundwater density as a function of salinity, temperature and pressure, calculated from Sigma-t (i.e. specific gravity anomaly calculated using ''swstate'' in the WHOI Oceans toolbox, based on UNESCO algorithms) as Density = Sigma-t + 1000 (flagging criteria, where "x" is Density: x<0="I", manual)

Data Table: GND-GCED-1802_Surface (Observations from the data logger installed at the well surface from Feb 2016 to Feb 2018, 71340 records)

Access: Public (released 01-Dec-2018)

Metadata: Text (ESA FLED), XML (Ecological Metadata Language)

Data Formats: Spreadsheet (CSV) [14454.32kb], Text File [12535.95kb], MATLAB (GCE Toolbox) [25709.32kb], MATLAB (Variables) [24711.43kb], Text Report [12996.25kb]

Column List:(display)

Column	Name	Units	Type	Description
1	Date	yyyy-mm-dd HH:MM:SS - GMT	string	Fractional MATLAB serial day (based on 1 = January 1, 0000)
2	Year	YYYY	integer	Calendar year
3	Month	M	integer	Calendar month
4	Day	D	integer	Calendar day
5	Hour	hh	integer	Hours - GMT
6	Minute	mm	integer	Minutes
7	Hammock	none	string	Hammock id where well is installed
8	Location	none	string	Location code of well in the GCE locations database
9	Longitude	degrees	floating-point	Geographic longitude in decimal degrees
10	Latitude	degrees	floating-point	Geographic latitude in decimal degrees
11	Sensor	none	string	Sensor ID (serial number)
12	Sensor_Elevation	m	floating-point	Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth
13	Flag_Sensor_Elevation	none	string	QA/QC flags for Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth (flagging criteria, where "x" is Sensor_Elevation: flag_inlist(Location, "HN_i_1_WELL_LOC_0, HN_i_1_WELL_LOC_1, PC_i_29_WELL_LOC_0")="E")
14	Pressure	Pa	floating-point	Groundwater pressure
15	Flag_Pressure	none	string	QA/QC flags for Groundwater pressure (flagging criteria, where "x" is Pressure: x<0="I", x>196133="Q", flag_well_pumping(x, [1 12], 0.4)="P")
16	Pressure_Corrected	Pa	floating-point	Groundwater well pressure corrected for atmospheric pressure using the equation: Pressure - Pressure_Atm
17	Flag_Pressure_Corrected	none	string	QA/QC flags for Groundwater well pressure corrected for atmospheric pressure using the equation: Pressure - Pressure_Atm (flagging criteria, where "x" is Pressure_Corrected: x<0="I", x>196133="Q", flag_well_pumping(x, [1 12], 0.4)="P", manual)
18	Depth	m	floating-point	Water depth calculated from corrected water pressure and latitude using a UNESCO algorithm
19	Flag_Depth	none	string	QA/QC flags for Water depth calculated from corrected water pressure and latitude using a UNESCO algorithm (flagging criteria, where "x" is Depth: manual)
20	Depth_Corrected	m	floating-point	Water depth calculated from corrected well pressure and geographic latitude using UNESCO algorithms
21	Flag_Depth_Corrected	none	string	QA/QC flags for Water depth calculated from corrected well pressure and geographic latitude using UNESCO algorithms (flagging criteria, where "x" is Depth_Corrected: x<0="Q", manual)
22	Water_Level	m	floating-point	Water level relative to NAVD88 datum calculated from sensor elevation and corrected water depth above the sensor
23	Flag_Water_Level	none	string	QA/QC flags for Water level relative to NAVD88 datum calculated from sensor elevation and corrected water depth above the sensor (flagging criteria, where "x" is Water_Level: manual)
24	Pressure_Atm	Pa	floating-point	Barometric pressure (15 minute average)
25	Flag_Pressure_Atm	none	string	QA/QC flags for Barometric pressure (15 minute average) (flagging criteria, where "x" is Pressure_Atm: x<0="I", x>106000="I", x<96000="Q", x>105000="Q", manual)
26	Temp_Water	°C	floating-point	Groundwater temperature
27	Flag_Temp_Water	none	string	QA/QC flags for Groundwater temperature (flagging criteria, where "x" is Temp_Water: x<0="I", x<10="Q", x>40="Q", x>100="I", flag_well_pumping(Pressure, [1 36], 0.5)="P")
28	Conductivity	mS/cm	floating-point	Groundwater conductivity
29	Flag_Conductivity	none	string	QA/QC flags for Groundwater conductivity (flagging criteria, where "x" is Conductivity: x<0="I", flag_well_pumping(Pressure, [1 36], 0.5)="P")
30	Salinity	PSU	floating-point	Water salinity calculated from conductivity, temperature and depth using UNESCO algorithms
31	Flag_Salinity	none	string	QA/QC flags for Water salinity calculated from conductivity, temperature and depth using UNESCO algorithms (flagging criteria, where "x" is Salinity: manual)
32	Density	kg/m^3	floating-point	Groundwater density as a function of salinity, temperature and pressure, calculated from Sigma-t (i.e. specific gravity anomaly calculated using ''swstate'' in the WHOI Oceans toolbox, based on UNESCO algorithms) as Density = Sigma-t + 1000
33	Flag_Density	none	string	QA/QC flags for Groundwater density as a function of salinity, temperature and pressure, calculated from Sigma-t (i.e. specific gravity anomaly calculated using ''swstate'' in the WHOI Oceans toolbox, based on UNESCO algorithms) as Density = Sigma-t + 1000 (flagging criteria, where "x" is Density: x<0="I", manual)

Statistics:

Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS

Citation:

Craft, Christopher B. 2018. Continuous groundwater well temperature, salinity and water level measurements at the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) site from May 2014 to February 2018. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/bdde791bb928c451261a2c3e1561ff56

» Help about file formats, technical specifications and file versioning