I. Data Set Descriptors A. Title: Hammock groundwater well pressure and temperature measurements for PC_i_29_WELL_LOC_0 from 25-Aug-2011 to 15-Oct-2013 B. Accession Number: HYD-GCES-1401b C. Description 1. Originator(s): Name: Clark Alexander Address: 10 Ocean Science Circle, Skidaway Institute of Oceanography, Savannah, Georgia Postal Code: 31411 Country: USA Email: clark.alexander@skio.usg.edu 2. Abstract: Pressure and temperature were measured in a PVC groundwater well at 15 minute intervals using a Schlumberger Cera-Diver from 25-Aug-2011 to 23-Sep-2011. Data were downloaded from the logger using communications software, then imported into MATLAB for post-processing, quality control and documention. Raw, unvented pressure readings were corrected for atmospheric pressure and sensor height from the bottom of the well to generate corrected pressure readings. These data were collected as part of the Georgia Coastal Ecosystems LTER Intensive Hammock Characterization project (http://gce-lter.marsci.uga.edu/public/app/send_project_eml.asp?id=57), and will be used for groundwater modeling studies at two marsh hammocks on Sapelo Island, Georgia. 3. Study Type: Monitoring 4. Study Themes: Hydrology, Groundwater 5. LTER Core Areas: Inorganic Fluxes 6. Georeferences: geographic coordinates as data columns 7. Submission Date: D. Keywords: pressure, well, groundwater, hammock, hydrostatic II. Research Origin Descriptors A. Overall Project Description 1. Project Title: Georgia Coastal Ecosystems LTER Project 2. Principal Investigators: Name: Merryl Alber Address: Dept. of Marine Sciences, University of Georgia, Athens, Georgia Postal Code: 30602-3636 Country: USA Email: malber@uga.edu Name: Steven C. Pennings Address: Department of Biology and Biochemistry, University of Houston, Houston, Texas Postal Code: 7204-5513 Country: USA Email: spennings@uh.edu 3. Funding Period: 01-May-2000 to 31-Dec-2012 4. Objectives: To investigate the linkages between coastal and distant upland areas in central Georgia mediated by surface and ground water delivery to the coastal zone. This will be addressed by examining the relationship between variability in environmental factors driven by river flow, primarily salinity, and ecosystem processes and structure. 5. Abstract: The Georgia Coastal Ecosystems (GCE) LTER program, located on the central Georgia coast, was established in 2000. The study domain encompasses three adjacent sounds (Altamaha, Doboy, Sapelo) and includes upland (mainland, barrier islands, marsh hammocks), intertidal (fresh, brackish and salt marsh) and submerged (river, estuary, continental shelf) habitats. Patterns and processes in this complex landscape vary spatially within and between sites, and temporally on multiple scales (tidal, diurnal, seasonal, and interannual). Overlain on this spatial and temporal variation are long-term trends caused by climate change, sea level rise, and human alterations of the landscape. These long-term trends are likely to manifest in many ways, including changes in water quality, river discharge, runoff and tidal inundation patterns throughout the estuarine landscape. The overarching goal of the GCE program is to understand the mechanisms by which variation in the quality, source and amount of both fresh and salt water create temporal and spatial variability in estuarine habitats and processes, in order to predict directional changes that will occur in response to long-term shifts in estuarine salinity patterns. 6. Funding Source: NSF OCE 9982133 and OCE-0620959 B. Sub-project Description 1. Site Description a. Geographic Location: PC_i_29 -- Hammock PC_i_29, Sapelo Island, Georgia, USA PC_i_29_WELL_LOC_0 -- Hammock PC_i_29 Well Location 0 Coordinates: PC_i_29 -- NW: 81 16 43.6 W, 31 23 41.1 N NE: 81 16 39.3 W, 31 23 41.1 N SE: 81 16 39.3 W, 31 23 39.5 N SW: 81 16 43.6 W, 31 23 39.5 N PC_i_29_WELL_LOC_0 -- 81 16 39.4 W, 31 23 42.6 N b. Physiographic Region: PC_i_29 -- Back-barrier island PC_i_29_WELL_LOC_0 -- Back-barrier island c. Landform Components: PC_i_29 -- Maritime forest bordered by intertidal salt marsh PC_i_29_WELL_LOC_0 -- Marsh hammock d. Hydrographic Characteristics: PC_i_29 -- Site is subject to 2-3m semi-diurnal tides PC_i_29_WELL_LOC_0 -- Site is subject to 2-3m semi-diurnal tides e. Topographic Attributes: PC_i_29 -- Flat, with elevations ranging from 0-3m above mean low tide PC_i_29_WELL_LOC_0 -- Flat, with elevations ranging from 0-3m above mean low tide f. Geology, Lithology and Soils: PC_i_29 -- Pleistocene sediments PC_i_29_WELL_LOC_0 -- Pleistocene sediments g. Vegetation Communities: PC_i_29 -- unspecified PC_i_29_WELL_LOC_0 -- unspecified h. History of Land Use and Disturbance: i. Climate: Climate summary for Sapelo Island, Georgia, based on NWS data from 1980-2001: Daily-aggregated Values: Mean (sample standard deviation) mean air temperature: 19.78°C (6.98°C) minimum air temperature: 14.64°C (7.54°C) maximum air temperature: 24.62°C (6.78°C) total precipitation: 3.58mm (11.35mm) Yearly-aggregated Values: Mean (sample standard deviation) total precipitation (1981-2000): 1302mm (250mm) 2. Experimental or Sampling Design a. Design Characteristics: Groundwater pressure was measured continously to characterize changes in water table and groundwater flow in two marsh Hammocks on Sapelo Island, Georgia. b. Permanent Plots: none c. Data Collection Duration and Frequency: Pressure was measured continuously and logged at 15 minute intervals by an automated data logger installed in a PVC groundwater well. Beginning of Observations: 25-Aug-2011 End of Observations: 15-Oct-2013 3. Research Methods a. Field and Laboratory Methods: Method 1: Hammock Selection -- In 2008 we selected two hammocks for detailed study: HN_I_1 is of Holocene origin and is located adjacent to Blackbeard Island to the north of Sapelo Island, Georgia; PC_I_29 is of Pleistocene origin and is located adjacent to the south end of Sapelo Island. These hammocks are of similar size, with similar vegetation zones in the high marsh. We set up transects in each hammock that run from the nearby upland (Blackbeard and Sapelo Islands, respectively), through the marsh, and up and over each hammock to the marsh adjacent to the Sound (Sapelo and Doboy, respectively). Method 2: Well Installation -- On each hammock, groundwater wells were installed along the transects in the locations sampled by vibracore. Wells were placed in sand layers in order to prevent clogging and to allow sampling of a continuously connected groundwater source. In addition to the vibracore stations, two additional lateral wells were installed at HN_I_1 approximately 5 meters to either side of the main transect near well #4 in order to get data on lateral inflow of groundwater. An additional upland well was also installed at this site in order to obtain a true zero salinity end member. The wells range in depth from 41 to 110 cm below a constant zero datum (99 to 232 cm below the surface). At PC_I_29, the two lateral wells are located near well #6. Well depths at this site range between 75 and 168 cm below a zero datum (130 to 247 cm below the surface). Method 3: Pressure Measurements -- Groundwater pressure was measured using a Hach Hydrolab MiniSonde data logger installed in a PVC well, suspended from the top of the well using a metal cable so that the sensor was appoximately 0.25m from the well bottom. Sensors are retrieved and data are downloaded approximately semi-monthly. Method 4: Data Post-processing -- Raw binary data were converted to ASCII text files using Win-Situ software provided with the instrument. Text files were then imported into MATLAB using the GCE Data Toolbox for MATLAB, and integrated with metadata about well location, sensor placement and well elevation. Complete data sets were then quality-controlled using automated QA/QC rules and visual inspection. Method 5: Pressure Correction -- Groundwater pressure data were corrected for atmospheric pressure using atmospheric pressure data simultaneously collected using a barometric sensor in the well field. b. Instrumentation: Method 1: Pressure Sensor Manufacturer: Schlumberger (Model: Cera-Diver, unvented) Parameter: Pressure (Accuracy: +/- 0.5cm H2O, Range: 0-10m H2O) Parameter: Temperature (Accuracy: +/- 0.10 ºC, Range: 0 to 50ºC) Method 2: none Method 3: none Method 4: none Method 5: Barometric Pressure Sensor Manufacturer: Schlumberger (Model: Baro-Diver) Parameter: Pressure (Accuracy: +/- 0.5cm H2O, Range: 0-10m H2O) Parameter: Temperature (Accuracy: +/- 0.10 ºC, Range: 0 to 50ºC) c. Taxonomy and Systematics: Method 1: none Method 2: none Method 3: none Method 4: none Method 5: none d. Speclies List: e. Permit History: Method 1: none Method 2: none Method 3: none Method 4: none Method 5: none 4. Project Personnel a. Personnel: 1: Clark Alexander 2: Claudia Venherm 3: Kristen Anstead 4: Wade Sheldon b. Affiliations: 1: Skidaway Institute of Oceanography 2: Skidaway Institute of Oceanography 3: University of Georgia Marine Institute, Sapelo Island, Georgia 4: University of Georgia, Athens, Georgia III. Data Set Status and Accessibility A. Status 1. Latest Update: 24-Jun-2015 2. Latest Archive Date: 3. Latest Metadata Update: 24-Jun-2015 4. Data Verification Status: B. Accessibility 1. Storage Location and Medium: Stored at GCE-LTER Data Management Office Dept. of Marine Sciences Univ. of Georgia Athens, GA 30602-3636 USA on media: electronic data download (WWW) or compact disk 2. Contact Person: Name: Wade M. Sheldon, Jr. Position: GCE-LTER Information Manager Address: Dept. of Marine Sciences, University of Georgia, Athens, Georgia Postal Code: 30602-3636 Country: USA Email: gcelter@uga.edu 3. Copyright Restrictions: not copyrighted 4. Restrictions: All publications based on this data set must cite the contributor and Georgia Coastal Ecosystems LTER project, and two copies of the manuscript must be submitted to the GCE-LTER Information Management Office. a. Release Date: Affiliates: , Public: b. Citation: Data provided by the Georgia Coastal Ecosystems Long Term Ecological Research Project, supported by funds from NSF OCE 9982133 c. Disclaimer: The user assumes all responsibility for errors in judgement based on interpretation of data and analyses presented in this data set. 5. Costs: free electronic data download via WWW, distribution on CD may be subject to nominal processing and handling fee IV. Data Structural Descriptors A. Data Set File 1. File Name: HYD-GCES-1401b_PC_i_29_Well_0_SC_aug11-oct13_1_0.CSV 2. Size: 75051 records 3. File Format: ASCII text (comma-separated value format) 3a. Delimiters: single comma 4. Header Information: 5 lines of ASCII text 5. Alphanumeric Attributes: upper case 6. Quality Control Flag Codes: I = invalid value, Q = questionable value, X = excise record flag (data collected under unsuitable conditions), E = estimated value based on interpolation, P = value recorded during or immediately after well pumping 7. Authentication Procedures: not specified 8. Calculations: Pressure: Pressure(Pa) = Pressure(cm H2O) * 98.0665 Pressure_Corrected: Pressure_Corrected = Pressure - Pressure_Atm Depth: Depth = pressure2depth(Pressure_Corrected,Latitude,'Pa') Water_Level: Water_Level = Sensor_Elevation + Depth_Corrected 9. Processing History: Software version: GCE Data Toolbox Version 3.9.3 (06-Apr-2015) Data structure version: GCE Data Structure 1.1 (29-Mar-2001) Original data files processed: SC_PCi29_Well0_G6685_20110825-20110923_filtered.CSV (2762 records) SC_PCi29_Pressure_F9155_20110627-20110808_filtered.CSV (8327 records) SC_PCi29_Pressure_F9155_20110808-20110825_filtered.CSV (9978 records) SC_PCi29_Pressure_F9155_20110825-20110923_filtered.CSV (2762 records) SC_PCi29_Pressure_F9155_20110923-20111019_filtered.CSV (5258 records) SC_PCi29_Pressure_F9155_20111019-20111116_filtered.CSV (7948 records) SC_PCi29_Pressure_F9155_20111116-20111207_filtered.CSV (9975 records) SC_PCi29_Pressure_F9155_20111207-20120105_filtered.CSV (12762 records) SC_PCi29_Well0_G6685_20110923-20111019_filtered.CSV (5258 records) SC_PCi29_Pressure_F9155_20110627-20110808_filtered.CSV (8327 records) SC_PCi29_Pressure_F9155_20110808-20110825_filtered.CSV (9978 records) SC_PCi29_Pressure_F9155_20110825-20110923_filtered.CSV (2762 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SC_PCI29_Pressure_F9155_20121221-20130222_filtered.CSV (6041 records) SC_PCI29_Pressure_F9155_20121221-20130322_filtered.CSV (8722 records) SC_PCI29_Pressure_N5731_20130621-20130717_filtered.CSV (2594 records) SC_PCI29_Pressure_N5731_20130621-20130814_filtered.CSV (5180 records) SC_HNI1_Pressure_M7860_130618164054_filtered.CSV (17277 records) SC_HNI1_Pressure_M7860_20130618-20130717_filtered.CSV (2782 records) SC_HNI1_Pressure_M7860_20130618-20130813_filtered.CSV (5377 records) SC_HNI1_Pressure_M7860_130618164054_filtered.CSV (17277 records) SC_HNI1_Pressure_M7860_20130618-20130717_filtered.CSV (2782 records) SC_HNI1_Pressure_M7860_20130618-20130813_filtered.CSV (5377 records) SC_PCi29_Well0_G6685_20130619-20131015_filtered.CSV (11353 records) SC_PCI29_Pressure_F9155_20121221-20130123_filtered.CSV (3170 records) SC_PCI29_Pressure_F9155_20121221-20130222_filtered.CSV (6041 records) SC_PCI29_Pressure_F9155_20121221-20130322_filtered.CSV (8722 records) SC_PCI29_Pressure_N5731_20130621-20130717_filtered.CSV (2594 records) SC_PCI29_Pressure_N5731_20130621-20130814_filtered.CSV (5180 records) SC_HNI1_Pressure_M7860_130618164054_filtered.CSV (17277 records) SC_HNI1_Pressure_M7860_20130618-20130717_filtered.CSV (2782 records) SC_HNI1_Pressure_M7860_20130618-20130813_filtered.CSV (5377 records) SC_HNI1_Pressure_M7860_130618164054_filtered.CSV (17277 records) SC_HNI1_Pressure_M7860_20130618-20130717_filtered.CSV (2782 records) SC_HNI1_Pressure_M7860_20130618-20130813_filtered.CSV (5377 records) SC_PCi29_Pressure_N5731_20130621-20131213_filtered.CSV (16807 records) Data processing history: 19-Mar-2012: new GCE Data Structure 1.1 created ('newstruct') 19-Mar-2012: 2762 rows imported from ASCII data file 'SC_PCi29_Well0_G6685_20110825-20110923_filtered.CSV' ('imp_ascii') 19-Mar-2012: data descriptor metadata updated based on the template 'GCE_Cera_Diver' ('meta_template') 19-Mar-2012: data structure validated ('gce_valid') 19-Mar-2012: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 19-Mar-2012: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 19-Mar-2012: updated 2 metadata fields in the Status, Supplement sections ('imp_schlumberger_sonde') 19-Mar-2012: updated 2 metadata fields in the Dataset, Status sections ('addmeta') 19-Mar-2012: updated 2 metadata fields in the Dataset, Status sections ('addmeta') 19-Mar-2012: calculated calendar date in MATLAB serial day (base 1/1/0000) format from individual date component columns Year, Month, Day, Hour, Minute and Second, added 'Date' column at position 1 ('add_datecol') 19-Mar-2012: added column 'Sensor_Elevation' at position 8 ('addcol') 19-Mar-2012: added column 'Sensor' at position 8 ('addcol') 19-Mar-2012: added column 'Latitude' at position 8 ('addcol') 19-Mar-2012: Q/C flagging criteria applied for column(s) Latitude, 'flags' field updated ('dataflag') 19-Mar-2012: added column 'Longitude' at position 8 ('addcol') 19-Mar-2012: Q/C flagging criteria applied for column(s) Longitude, 'flags' field updated ('dataflag') 19-Mar-2012: added column 'Location' at position 8 ('addcol') 19-Mar-2012: added column 'Hammock' at position 8 ('addcol') 19-Mar-2012: added geographic metadata based on matching values in column Location to location and station names registered in 'geo_locations.mat' ('add_sitemetadata') 19-Mar-2012: updated 9 metadata fields in the Site, Status sections ('add_sitemetadata') 19-Mar-2012: updated title ('newtitle') 19-Mar-2012: updated 2 metadata fields in the Dataset, Status sections ('newtitle') 07-Jan-2014: converted units of 'Pressure' column and 2 QA/QC flag criteria parameters from cm H2O to Pa ('unit_convert') 07-Jan-2014: Q/C flagging criteria applied for column(s) Pressure, 'flags' field updated ('dataflag') 07-Jan-2014: performed a left join of columns Year, Month, Day, Hour and Minute on columns Year, Month, Day, Hour and Minute from a second structure, returning column(s) Date, Second, Hammock, Location, Longitude, Latitude, Sensor, Sensor_Elevation, Pressure and Temp_Water from the first structure and column(s) Pressure_Atm from the second structure (2762 rows) ('joindata') 07-Jan-2014: updated title ('newtitle') 07-Jan-2014: updated 1 metadata fields in the Dataset sections ('addmeta') 07-Jan-2014: copied/reordered columns Date, Year, Month, Day, Hour, Minute, Second, Hammock, Location, Longitude, Latitude, Sensor, Sensor_Elevation, Pressure, Pressure_Atm and Temp_Water ('copycols') 07-Jan-2014: calculated column Pressure_Corrected generated by the expression 'Pressure - Pressure_Atm' (add_calcexpr) 07-Jan-2014: updated 1 metadata fields in the Data sections ('addmeta') 07-Jan-2014: added column 'Depth_Corrected' at position 16 ('addcol') 07-Jan-2014: Q/C flagging criteria applied for column(s) Depth_Corrected, 'flags' field updated ('dataflag') 07-Jan-2014: calculated column Depth generated by the expression 'pressure2depth(Pressure_Corrected,Latitude,'Pa')' (add_calcexpr) 07-Jan-2014: updated 1 metadata fields in the Data sections ('addmeta') 07-Jan-2014: calculated column Water_Level generated by the expression 'Sensor_Elevation + Depth_Corrected' (add_calcexpr) 07-Jan-2014: updated 1 metadata fields in the Data sections ('addmeta') 08-Jan-2014: updated 1 metadata fields in the Data sections ('addmeta') 08-Jan-2014: manually added 'P' flags to 2 records in column(s) Pressure ('addflags') 08-Jan-2014: locked Q/C flag criteria for column Pressure to prevent automatic evaluation ('flag_locks') 08-Jan-2014: 2496 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 2691 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 2026 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 2788 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 3055 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 19103 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 08-Jan-2014: 5950 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 08-Jan-2014: 2517 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 3058 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: 17268 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 08-Jan-2014: 11353 rows added at the bottom of the data set ('datamerge') 08-Jan-2014: updated 55 metadata fields in the Data, Dataset, Project, Site, Status, Study, Supplement sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: automatically assigned study date metadata descriptors based on the range of date values in date/time columns (add_studydates) 08-Jan-2014: updated title ('newtitle') 08-Jan-2014: updated 1 metadata fields in the Dataset sections ('addmeta') 08-Jan-2014: Q/C flagging criteria applied, 'flags' field updated ('dataflag') 08-Jan-2014: manually edited data set metadata ('ui_editmetadata') 08-Jan-2014: edited data set title in structure and metadata ('ui_editor') 08-Jan-2014: QA/QC flags assigned by visual inspection (ui_visualqc); flags set on Pressure record(s): 15817, 15819, 15820, 15821, 15822, 15823, 15824, 15825, 46443, 46444, 46445, 46446, 46447, 46448, 46449, 46450, 46451, 46452, 46453, 52487, 52488, 52489, 52490, 52491, 52492, 52493, 52494, 52495, 66490, 66491, 66492, 66493, 66494, 66495, 66496, 66497, 73132, 73133, 73134, 73135, 73136, 73137, 73138, 75038, 75039, 75040, 75041, 75042, 75043, 75044, 75045, 75046, 75047, 75048, 75049, 75050, 75051, 75052, 75053, 75054, 75055, 75056, 75057, 75058, 75059, 75060, 75061, 75062, 75063, 75064, 75065, 75066 and 75067 08-Jan-2014: deleted 312 rows with values in column(s) Pressure assigned QA/QC flag(s) P (value recorded during or immediately after well pumping). ('cullflags') 08-Jan-2014: inserted 296 new records with date/time values and NaN/null data values (replicating common values in the non-data columns Hammock, Location, Longitude, Latitude and Sensor) to fill in date/time interval gaps in the data series ('pad_date_gaps') 08-Jan-2014: sorted by column Date(ascending) ('sortdata') 08-Jan-2014: deleted existing datetime columns Year, Month, Day, Hour, Minute and Second; updated Year, Month, Day, Hour, Minute and Second datetime columns added after column Date ('add_datepartcols') 08-Jan-2014: updated 1 metadata fields in the Data sections ('addmeta') 08-Jan-2014: sorted by column Date(ascending) ('sortdata') 08-Jan-2014: replaced 282 missing values in column Sensor_Elevation with estimated values based on 1D interpolation of Sensor_Elevation as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 282 values in 'Sensor_Elevation' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Sensor_Elevation, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 296 missing values in column Pressure with estimated values based on 1D interpolation of Pressure as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 296 values in 'Pressure' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Pressure, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 269 missing values in column Pressure_Corrected with estimated values based on 1D interpolation of Pressure_Corrected as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 269 values in 'Pressure_Corrected' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Pressure_Corrected, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 296 missing values in column Depth with estimated values based on 1D interpolation of Depth as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 296 values in 'Depth' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Depth, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 296 missing values in column Depth_Corrected with estimated values based on 1D interpolation of Depth_Corrected as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 296 values in 'Depth_Corrected' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Depth_Corrected, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 296 missing values in column Pressure_Atm with estimated values based on 1D interpolation of Pressure_Atm as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 296 values in 'Pressure_Atm' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Pressure_Atm, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 296 missing values in column Temp_Water with estimated values based on 1D interpolation of Temp_Water as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 296 values in 'Temp_Water' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Temp_Water, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 282 missing values in column Water_Level with estimated values based on 1D interpolation of Water_Level as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 282 values in 'Water_Level' were updated with new values ('update_data') 08-Jan-2014: Q/C flagging criteria applied for column(s) Water_Level, 'flags' field updated ('dataflag') 08-Jan-2014: replaced 15 missing values in column Pressure_Corrected with estimated values based on 1D interpolation of Pressure_Corrected as a function of Date using the MATLAB 8.2 function 'interp1' with the 'pchip' (piecewise cubic Hermite interpolation) method option, excluding data gaps with more than 60 consecutive missing values, and flagging the estimated values as 'E' ('interp_missing') 08-Jan-2014: 15 values in 'Pressure_Corrected' were updated with new values ('update_data'): changed record 66504 from NaN to 4.266e+03, changed record 66505 from NaN to 4.274e+03, changed record 66506 from NaN to 4.281e+03, changed record 66507 from NaN to 4.286e+03, changed record 66508 from NaN to 4.291e+03, changed record 66509 from NaN to 4.296e+03, changed record 66510 from NaN to 4.301e+03, changed record 66511 from NaN to 4.307e+03, changed record 73146 from NaN to 9.151e+03, changed record 73147 from NaN to 9.090e+03, changed record 73148 from NaN to 9.028e+03, changed record 73149 from NaN to 8.969e+03, changed record 73150 from NaN to 8.916e+03, changed record 73151 from NaN to 8.874e+03, changed record 73152 from NaN to 8.846e+03 08-Jan-2014: Q/C flagging criteria applied for column(s) Pressure_Corrected, 'flags' field updated ('dataflag') 08-Jan-2014: Data Type of column Water_Level changed from 'd' to 'f';Numeric Type of column Water_Level changed from 'discrete' to 'continuous ('ui_editor') 08-Jan-2014: updated 1 metadata fields in the Data sections ('addmeta') 24-Jun-2015: copied/reordered columns Date, Year, Month, Day, Hour, Minute, Second, Hammock, Location, Longitude, Latitude, Sensor, Sensor_Elevation, Pressure, Pressure_Corrected, Pressure_Corrected, Depth, Depth_Corrected, Water_Level, Pressure_Atm, Temp_Water and Water_Level ('copycols') 24-Jun-2015: Data Type of column Pressure_Corrected changed from 'e' to 'f ('ui_editor') 24-Jun-2015: replaced 63724 NaN/empty values in column Pressure_Corrected with values from column Pressure_Corrected ('coalesce_cols') 24-Jun-2015: 63724 values in 'Pressure_Corrected' were updated with new values ('update_data') 24-Jun-2015: Q/C flagging criteria applied for column(s) Pressure_Corrected, 'flags' field updated ('dataflag') 24-Jun-2015: deleted column Pressure_Corrected from the structure ('deletecols') 24-Jun-2015: copied/reordered columns Date, Year, Month, Day, Hour, Minute, Second, Hammock, Location, Longitude, Latitude, Sensor, Sensor_Elevation, Pressure, Pressure_Corrected, Depth, Depth_Corrected, Water_Level, Water_Level, Pressure_Atm and Temp_Water ('copycols') 24-Jun-2015: deleted column Water_Level from the structure ('deletecols') 24-Jun-2015: updated 1 metadata fields in the Dataset sections ('addmeta') 24-Jun-2015: converted dates in column(s) Date to format yyyy-mm-dd HH:MM:SS 24-Jun-2015: flags for columns Sensor_Elevation, Pressure, Pressure_Corrected, Depth, Depth_Corrected, Water_Level, Pressure_Atm and Temp_Water converted to data columns, flag codes updated in metadata ('flags2cols') 24-Jun-2015: updated 6 metadata fields in the Data sections ('addmeta') 24-Jun-2015: updated 15 metadata fields in the Status, Data sections to reflect attribute metadata ('updatecols') 24-Jun-2015: parsed and formatted metadata ('listmeta') B. Variable Information 1. Variable Name: column 1. Date column 2. Year column 3. Month column 4. Day column 5. Hour column 6. Minute column 7. Second column 8. Hammock column 9. Location column 10. Longitude column 11. Latitude column 12. Sensor column 13. Sensor_Elevation column 14. Flag_Sensor_Elevation column 15. Pressure column 16. Flag_Pressure column 17. Pressure_Corrected column 18. Flag_Pressure_Corrected column 19. Depth column 20. Flag_Depth column 21. Depth_Corrected column 22. Flag_Depth_Corrected column 23. Water_Level column 24. Flag_Water_Level column 25. Pressure_Atm column 26. Flag_Pressure_Atm column 27. Temp_Water column 28. Flag_Temp_Water 2. Variable Definition: column 1. Calendar date and time of observation column 2. Calendar year column 3. Calendar month column 4. Calendar day column 5. Hours - GMT column 6. Minutes column 7. Seconds column 8. Hammock id where well is installed column 9. Location code of well in the GCE locations database column 10. Geographic longitude in decimal degrees column 11. Geographic latitude in decimal degrees column 12. Sensor ID (serial number) column 13. Absolute elevation of the sensor relative to NAVD88 datum, adjusted for PVC riser height and sensor deployment depth column 14. 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: manual) column 15. Groundwater pressure column 16. QA/QC flags for Groundwater pressure (flagging criteria, where "x" is Pressure: x<0="I", x>196133="Q", manual) column 17. Groundwater well pressure corrected for atmospheric pressure using the equation: Pressure - Pressure_Atm column 18. 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) column 19. Water depth calculated from corrected water pressure and latitude using a UNESCO algorithm column 20. QA/QC flags for Water depth calculated from corrected water pressure and latitude using a UNESCO algorithm (flagging criteria, where "x" is Depth: manual) column 21. Water depth calculated from corrected well pressure and geographic latitude using UNESCO algorithms column 22. 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) column 23. Water level relative to NAVD88 datum calculated from sensor elevation and corrected water depth above the sensor column 24. 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) column 25. Atmospheric pressure column 26. QA/QC flags for Atmospheric pressure (flagging criteria, where "x" is Pressure_Atm: x<0="I", x>196133="Q", manual) column 27. Groundwater temperature column 28. 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", manual) 3. Units of Measurement: column 1. yyyy-mm-dd HH:MM:SS - GMT column 2. YYYY column 3. MM column 4. DD column 5. hr column 6. min column 7. sec column 8. none column 9. none column 10. degrees column 11. degrees column 12. none column 13. m column 14. none column 15. Pa column 16. none column 17. Pa column 18. none column 19. m column 20. none column 21. m column 22. none column 23. m column 24. none column 25. Pa column 26. none column 27. °C column 28. none 4. Data Type a. Storage Type: column 1. string column 2. integer column 3. integer column 4. integer column 5. integer column 6. integer column 7. floating-point column 8. string column 9. string column 10. floating-point column 11. floating-point column 12. string column 13. floating-point column 14. string column 15. floating-point column 16. string column 17. floating-point column 18. string column 19. floating-point column 20. string column 21. floating-point column 22. string column 23. floating-point column 24. string column 25. floating-point column 26. string column 27. floating-point column 28. string b. Variable Codes: Flag_Sensor_Elevation: E = estimated value based on interpolation Flag_Pressure: E = estimated value based on interpolation Flag_Pressure_Corrected: E = estimated value based on interpolation Flag_Depth: E = estimated value based on interpolation Flag_Depth_Corrected: E = estimated value based on interpolation Flag_Water_Level: E = estimated value based on interpolation Flag_Pressure_Atm: E = estimated value based on interpolation Flag_Temp_Water: E = estimated value based on interpolation c. Numeric Range: column 1. (none) column 2. 2011 to 2013 column 3. 1 to 12 column 4. 1 to 31 column 5. 0 to 23 column 6. 0 to 45 column 7. 0 to 59.9999 column 8. (none) column 9. (none) column 10. -81.2776 to -81.2776 column 11. 31.3952 to 31.3952 column 12. (none) column 13. -0.514 to -0.514 column 14. (none) column 15. 102420.6526 to 111972.3297 column 16. (none) column 17. 843.3719 to 10051.8163 column 18. (none) column 19. 0.083754 to 0.99823 column 20. (none) column 21. 0.083754 to 0.99823 column 22. (none) column 23. -0.43025 to 0.48423 column 24. (none) column 25. 99586.5308 to 103577.8373 column 26. (none) column 27. 18.8 to 24.61 column 28. (none) d. Missing Value Code: 5. Data Format a. Column Type: column 1. text column 2. numerical column 3. numerical column 4. numerical column 5. numerical column 6. numerical column 7. numerical column 8. text column 9. text column 10. numerical column 11. numerical column 12. text column 13. numerical column 14. text column 15. numerical column 16. text column 17. numerical column 18. text column 19. numerical column 20. text column 21. numerical column 22. text column 23. numerical column 24. text column 25. numerical column 26. text column 27. numerical column 28. text b. Number of Columns: 28 c. Decimal Places: column 1. 0 column 2. 0 column 3. 0 column 4. 0 column 5. 0 column 6. 0 column 7. 2 column 8. 0 column 9. 0 column 10. 6 column 11. 6 column 12. 0 column 13. 4 column 14. 0 column 15. 1 column 16. 0 column 17. 3 column 18. 0 column 19. 5 column 20. 0 column 21. 3 column 22. 0 column 23. 5 column 24. 0 column 25. 1 column 26. 0 column 27. 2 column 28. 0 6. Logical Variable Type: column 1. datetime (none) column 2. datetime (discrete) column 3. datetime (discrete) column 4. datetime (discrete) column 5. datetime (discrete) column 6. datetime (discrete) column 7. datetime (continuous) column 8. nominal (none) column 9. nominal (none) column 10. geographic coordinate (continuous) column 11. geographic coordinate (continuous) column 12. nominal (none) column 13. calculation (continuous) column 14. coded value (none) column 15. data (continuous) column 16. coded value (none) column 17. calculation (continuous) column 18. coded value (none) column 19. calculation (continuous) column 20. coded value (none) column 21. calculation (continuous) column 22. coded value (none) column 23. calculation (continuous) column 24. coded value (none) column 25. data (continuous) column 26. coded value (none) column 27. data (continuous) column 28. coded value (none) 7. Flagging Criteria: column 1. none column 2. none column 3. x<1="I";x>12="I" column 4. x<1="I";x>31="I" column 5. x<0="I";x>24="I" column 6. x<0="I";x>60="I" column 7. x<0="I";x>60="I" column 8. none column 9. none column 10. x<-180="I";x>180="I" column 11. x<-90="I";x>90="I" column 12. none column 13. manually-assigned flags column 14. none column 15. x<0="I";x>196133="Q";manually-assigned flags column 16. none column 17. x<0="I";x>196133="Q";flag_well_pumping(x,[1 12],0.4)="P";manually-assigned flags column 18. none column 19. manually-assigned flags column 20. none column 21. x<0="Q";manually-assigned flags column 22. none column 23. manually-assigned flags column 24. none column 25. x<0="I";x>196133="Q";manually-assigned flags column 26. none column 27. x<0="I";x<10="Q";x>40="Q";x>100="I";manually-assigned flags column 28. none C. Data Anomalies: Deleted 312 rows with values in column(s) Pressure assigned QA/QC flag(s) P (value recorded during or immediately after well pumping). V. Supplemental Descriptors A. Data Acquisition 1. Data Forms: Digital copies of data logger files are maintained in the GCE-LTER Information Management office and UGA Marine Institute on Sapelo Island. 2. Form Location: GCE-LTER Information Management Office, Dept. of Marine Sciences, University of Georgia, Athens, GA 30602 3. Data Entry Validation: B. Quality Assurance/Quality Control Procedures: QA/QC flags are generated automatically according to domain criteria specified for each data column, then subsequently reviewed and revised as appropriate. Coded flag columns are generated for each data column, listing qualifier flags assigned to the data value on the corresponding row. C. Supplemental Materials: not applicable D. Computer Programs: MATLAB R2009B E. Archival Practices: Data sets and documentation are stored in structured binary (Matlab 6.x files) and delimited ASCII text formats, and archived on magnetic tape and CD at the GCE LTER Information Management Office at the University of Georgia, Athens, Georgia, USA F. Publications: G. History of Data Set Usage 1. Data Request History: 2. Data Set Update History: not updated 3. Review History: none 4. Questions and Comments from Users: Data file for DataLogger. COMPANY: COMP.STATUS: Do DATE: 23/09/2011 TIME: 15:21:56 FILENAME: C:\Documents and Settings\kanstead\Desktop\Sept2011 Loggers\CSV\sc_pci29_well0_g6685_110923152155_G6685.CSV CREATED BY: SWS Diver-Office 4.0.76.0 [Logger settings] Instrument type = Cera-Diver= 16 Status = Started = 0 Serial number = ..00-G6685 216. Instrument number = = 0 Location = sc_pci29_well0_g6685 Sample period = M15 Sample method = T Number of channels = 2 [Channel 1] Identification = PRESSURE Reference level = 400.0 cm Range = 1750.0 cm Master level = 0 m Altitude = 0 m [Channel 2] Identification = TEMPERATURE Reference level = -20.00 °C Range = 100.00 °C [Series settings] Serial number = ..00-G6685 216. Instrument number = Location = sc_pci29_well0_g6685 Sample period = 00 00:15:00 0 Sample method = T Start date / time = 00:00:21 25/08/11 End date / time = 00:15:15 23/09/11 [Channel 1 from data header] Identification = PRESSURE Reference level = 400.0 cm Range = 1750.0 cm Master level = 0 m Altitude = 0 m [Channel 2 from data header] Identification = TEMPERATURE Reference level = -20.00 °C Range = 100.00 °C