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-RRB-2002.02
Dataset Title:Marsh water table height, logging data from the Railroad site on the Parker River for September-December 2002
Investigator 1: 
First Name:Charles
Last Name:Hopkinson
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:John Logan
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 4 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 September-December 2002.
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-RRB-2002.csv
Data File Name MAR-PR-Wtable-RRB-2002
Beginning Date 9/1/2002
End Date 12/9/2002
Number of Data Records 33550
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Version 02: June 11, 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
 
Methods:A transect of wells is established on the marsh platform, perpendicular to the marsh edge. A total of 6 wells are dug to the depth of the water table under the marsh platform. Wells 1-5 are spaced approximately evenly within the first 3m of shore, with well 6 approximately 20m upland from the marsh edge. A tide gauge is placed at the river bottom directly in front of the transect. Individual pressure transducers (Motorola MPX series) are used in each well (MPX5050) and in the tide gauge (MPX5100) at the river bottom to measure water height in terms of pressure. Prior to deployment, each transducer is calibrated to determine the correlation between voltage output and water height. Once in the field, water height measurements, in terms of voltage, are recorded every 4 minutes by a HOBO H8 4-Channel External Data Logger (Onset Computers). Voltage readings are uploaded from the HOBO and are then converted to absolute water height above the river bottom.

Well Location Information:
Well ID Height of Marsh Surface Above Creek Bottom (m) Horizontal Distance Upland of Creek Edge (m)
1 Pipe 2 1.04 -0.4*
2 Pipe 3 2.42 0.2*
3 Pipe 4 2.53 1.16
4 Pipe 5 2.63 1.74
5 Pipe 6 2.73 2.61
6 Pipe 7 2.89 22.61
An asterisk (*) indicates estimated distances

Pipe 1 tide gage located on river bottom.
Marsh wells 1-6, numbered consecutively moving upland.

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

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Pipe 1 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 1 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available
Pipe 2 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 2 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available
Pipe 3 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 3 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available
Pipe 4 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 4 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available
Pipe 5 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 5 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available
Pipe 6 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 6 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available
Pipe 7 time Date and minute of water table height measurement   datetime     YYYY-MM-DD hh:mm:ss NA NA=not available
Pipe 7 Wy Height of water table above creek bottom at a given pipe location centimeter ratio   real   NA NA=not available