Plum Island Ecosystems LTER Database

Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:MAR-PR-Wtable-RR-2007.03
Dataset Title:Marsh water table height, logging data from the railroad Spartina marsh site on the Parker River for April-December 2007.
Investigator 1: 
First Name:Anne
Last Name:Giblin
Address line 1:Ecosystems Center
Address line 2:MBL
Address line 3:7 MBL St
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Associate Investigators:Christina Maki, Colin Millar
Keywords:PIE LTER, Plum Island Ecosystems, Massachusetts, Parker River, disturbance, estuary, Spartina, water table, porewater, marsh, elevation
Abstract:Measurements of water table height in the Parker River marsh located downstream of the railroad bridge. Measurements were taken every 10 minutes at each logger along a transect of water level loggers running perpendicular to the Parker River bank at the railroad site, MAR-PR-Wtable-RR, for April - December 2007.
Contact: Plum Island Ecosystems LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7485
Email: pie_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/PIE/
DATA FILE INFORMATION:
Data File URL http://ecosystems.mbl.edu/PIE/data/MAR/data/MAR-PR-Wtable-RR-2007.csv
Data File Name MAR-PR-Wtable-RR-2007
Beginning Date 4/28/2007
End Date 12/5/2007
Number of Data Records 55488
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description no new data for 2007, collection done
Log of Changes: Version 01; new data and metadata
Version 02; corrected time stamp to ensure EST consistency throughout data set, 11Jan2010
Version 03: June 12, 2013, data and metadata updated to comply with importation to Drupal and LTER PASTA. Research location name and description updated.Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 3/14/13 12:02 PM for QA/QC to EML 2.1.0
 
RESEARCH LOCATION: MAR-PR-Wtable-RR Site 2
Geographic Description Lower Parker river, down-stream of railroad bridge, Spartina-dominated marsh edge, river kilometer is PR-12.75  
Location Bounding Box    
West Bounding Coordinate    
East Bounding Coordinate    
North Bounding Coordinate    
South Bounding Coordinate    
OR if single point location    
Latitude 42.761477  
Longitude -70.858759  
Elevation    
     
     
 
TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied Spartina alterniflora; Spartina patens
 
Methods:A transect of wells is established on the marsh platform, perpendicular to the marsh edge. A total of 5 wells are dug to the depth of the water table under the marsh platform. Wells 1-4 are spaced approximately evenly within the first 6m of marsh edge with well 5 approximately 20m upland from the marsh edge. A water level logger, referred to as the tide gauge, (Onset HOBO U20 series) is placed at the river bottom directly in front of the transect . Individual water level loggers (Onset HOBO U20 series) are used in each well and they measure water height in terms of absolute pressure. Barometric pressure is measured above ground with an additional Onset HOBO U20 series water level logger to tease out the atmospheric pressure from water column pressure. Prior to deployment, each water level logger is sealed in protective plastic whirl-pak bags filled with freshwater, and calibrated to known water depths. Once in the field, water height measurements, in terms of absolute pressure, are recorded every 10 minutes. Pressure readings are uploaded from the HOBO water level loggers using HOBOware software which compensates for temperature, fluid density, and barometric pressure, then are converted to absolute water height above the river bottom. Data is QA/QC'd to ensure that the loggers report the same flood water elevation on the marsh surface. The surface elevation of the marsh as measured by the marsh water level loggers must match that of the gps'd surface elevation. Any corrections made to a particular logger data field (logger # Dc (m)) are reported in the Offset corr field (Offset corr logger # (m)).



Well Location Information:
Logger Well Height of Marsh Surface Above Creek Bottom (m) Horizontal Distance Upland of Creek Edge (m)
1 (tide gauge) 0 -10.68
2 1 3.04 0.57
3 2 3.20 1.62
4 3 3.25 3.06
5 4 3.31 5.15
6 5 3.32 19.82

Logger 1 tide gauge located on river bottom.
Marsh wells 1-5, numbered consecutively moving upland.

NOTES AND COMMENTS: Due to occasional equipment malfunction, readings are not continuous throughout the field season. Times in EST.

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Time Date and minute of water height measurement (EST)   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Logger 1 (tide gauge) Dc (m) Depth of water (in m) above creek bottom relative to the tide gauge meter ratio   real   NA NA=not available
Offset corr logger 1 (m) Offset corr logger 1 (m) meter ratio   real   NA NA=not available
Logger 2 Dc (m) Depth of water (in m) above creek bottom relative to the tide gauge meter ratio   real   NA NA=not available
Offset corr logger 2 (m) Offset corr logger 2 (m) meter ratio   real   NA NA=not available
Logger 3 Dc (m) Depth of water (in m) above creek bottom relative to the tide gauge meter ratio   real   NA NA=not available
Offset corr logger 3 (m) Offset corr logger 3 (m) meter ratio   real   NA NA=not available
Logger 4 Dc (m) Depth of water (in m) above creek bottom relative to the tide gauge meter ratio   real   NA NA=not available
Offset corr logger 4 (m) Offset corr logger 4 (m) meter ratio   real   NA NA=not available
Logger 5 Dc (m) Depth of water (in m) above creek bottom relative to the tide gauge meter ratio   real   NA NA=not available
Offset corr logger 5 (m) Offset corr logger 5 (m) meter ratio   real   NA NA=not available
Logger 6 Dc (m) Depth of water (in m) above creek bottom relative to the tide gauge meter ratio   real   NA NA=not available
Offset corr logger 6 (m) Offset corr logger 6 (m) meter ratio   real   NA NA=not available