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-RRA-2001.01 |
| Dataset Title: | Marsh water table height, logging data from the Railroad site on the Parker River for May-August 2001 |
| 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: | Peter Raymond, Greg Peterson, John Logan |
| Keywords: | water table, porewater, marsh, Parker, elevation |
| Abstract: | Readings of water table height, taken every 4 minutes, by a transect of water level loggers running perpendicular to the Parker River bank at Site RR for May-August 2001. |
| 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-RRA-2001.dat |
| Data File Name | MAR-PR-Wtable-RRA-2001 |
| Beginning Date | 5/23/2001 |
| End Date | 8/31/2001 |
| Number of Data Records | 29483 |
| Other Files to Reference | |
| Availability Status | Type 1 |
| Quality Control Information | |
| Maintenance Description | |
| Log of Changes: | |
| RESEARCH LOCATION: | Site 1 |
| Geographic Description | Lower Parker river, down-stream of railroad bridge, Spartina-dominated marsh edge |
| Location Bounding Box | |
| West Bounding Coordinate | |
| East Bounding Coordinate | |
| North Bounding Coordinate | |
| South Bounding Coordinate | |
| OR if single point location | |
| Latitude | 42.75699458 |
| Longitude | -70.8635764 |
| 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 ID Height of Marsh Surface Above Creek Bottom (m) Horizontal Distance Upland of Creek Edge (m) 1 Pipe 2 1.0* -0.36 2 Pipe 3 2.4* 0.21 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 Pipe 1 tide gage located on river bottom. Marsh wells 1-6, numbered consecutively moving upland. An asterisk (*) indicates an estimated distance NOTES AND COMMENTS: Due to occasional equipment malfunction, readings are not continuous throughout the field season. |
| Variable Name | Variable Description | Units | Measurement Scale | Code Infomation | Number Type | DateTime Format | Missing Value Code | Missing Value Code Explanation |
| Pipe 1 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 1 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Pipe 2 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 2 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Pipe 3 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 3 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Pipe 4 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 4 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Pipe 5 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 5 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Pipe 6 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 6 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Pipe 7 time | Date and minute of water table height measurement | datetime | mm-dd-yyyy hh:mm | blank cell | ||||
| Pipe 7 Wy | Height of water table above creek bottom at a given pipe location | centimeter | ratio | real | blank cell | |||
| Comments | Information pertaining to individual data points | nominal | blank cell |