Watershed 80 Well D Data, 2003-2016.

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Amatya, Devendra M. and Trettin, Carl C.
Publication_Date: 2016
Title:
Watershed 80 Well D Data, 2003-2016.
Geospatial_Data_Presentation_Form: database
Description:
Abstract:
On October 20, 2003 a new well was excavated between manual wells w28027 and w28023 on Watershed 80. A Global Water WL15 pressure transducer (datalogger and linked sensor) was installed in the well, and shortly thereafter hourly measurements of water table level began. The WL15 unit was replaced by a WL16 pressure transducer on April 29, 2008.
Purpose:
The purpose of this well was to expand the temporal scale, range and frequency with which water table measurement data were acquired on Watershed 80 and to increase knowledge about the relationship of water table to precipitation, runoff, evapotranspiration (ET) and other related eco-hydrologic and biogeochemical processes.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2003
Ending_Date: 2016
Currentness_Reference:
ground condition
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
The geographic area covered by the dataset is Well D on Watershed 80 in the Santee Experimental Forest.
Bounding_Coordinates:
West_Bounding_Coordinate: -79.80355
East_Bounding_Coordinate: -79.78340
North_Bounding_Coordinate: 33.15951
South_Bounding_Coordinate: 33.14211
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Forested watersheds
Theme_Keyword: Water Table
Theme_Keyword: pressure transducer
Theme_Keyword: WL15
Theme_Keyword: WL16
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: South Carolina
Place_Keyword: Coastal Plain
Place_Keyword: Santee Experimental Forest
Place_Keyword: Watershed 80
Access_Constraints: None
Use_Constraints:
These data were collected by USDA Forest Service researchers. In order to use the data in a publication, presentation or other research product you must agree to acknowledge its source. Please use the reference below when citing this work:

(Data name) courtesy of the USDA Forest Service Center for Forested Wetlands Research.

The following statement may be added after an acknowledgement or credit:

The USDA Forest Service Center for Forested Wetlands Research homepage is http://www.srs.fs.usda.gov/charleston/.
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Original water level measurements were in feet above the pressure transducer (with a precision of 0.01 feet). These measurements were later converted to centimeters below ground surface and elevation (in meters) relative to mean sea level.
Logical_Consistency_Report:
Visual inspection of electronically plotted water table data and comparison with precipitation data from the Met 25 weather station on this watershed was employed to expose anomalous values for the expected water table response to rainfall.
Completeness_Report:
Hourly measurements were recorded by the datalogger, except during the occasional battery failure or equipment malfunction.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
Well D was originally installed as a manual well on August 28, 2003 using 3.8 centimeter (cm) diameter PVC pipe with a 1.8 meter (m) screen and following standard installation procedures. An auger was used to bore a hole approximately 7.6 cm in diameter, the screen and riser pipe were placed into the hole, and a gravel pack was added around the pipe along the screened section and up to about 15 cm below the ground surface. Bentonite clay was added to the top 15 cm of the bore hole as a seal to prevent percolation of surface water. Total well depth was approximately 2.48 m below ground surface.

On October 20, 2003 a Global Water WL15 pressure transducer (datalogger and linked sensor) was installed in the well, and the datalogger was set to record water level every hour.

The well was visited approximately every two weeks and the most recently acquired data was downloaded to a laptop computer using Global Logger software. Water level readings were manually checked by using a Hydrolite device inside the well after removing the WL15 unit. Starting in May 2009 this measurement was performed using a Solinst Mini 101 water level meter.

The WL15 unit began experiencing problems early in 2008 and was removed from the well on 3/18/08. A replacement WL16 pressure transducer was installed on 4/29/08. After that point data was downloaded to a laptop computer in the field using Global Logger II software.

The WL16 unit began experiencing problems in June 2010 and was removed from the well on 7/2/10. A replacement WL16 unit was installed on 7/7/10.

A date/time stamp anomaly was noted 8/13/13 9:13 EST (WL16 unit reading 7:53); the WL16 unit was removed on 8/19/13 and a replacement unit installed on 8/20/13.
Process_Step:
Process_Description:
Water level data was transferred to an electronic database at the office. Using information about the height of the well above ground surface and its elevation relative to mean sea level allowed for calculation and plotting of water table level below ground surface (in centimeters) and relative to mean sea level (in meters).

Ground surface elevation of Well D is 7.5084 meters above sea level.
Process_Date: Unknown
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Location = watershed name (WS80 = Watershed 80);
Instr_ID = instrument name (Well D = datalogger/sensor unit in Well D);
Date_time = instantaneous date and time associated with water table data (format MM/DD/YYYY HH:MM);
Date_ = date associated with water table data (format MM/DD/YYYY);
Time24_ = nearest hour associated with water table data (0-23), in hours;
Depth_cm_b (alias 'Depth below ground surface') = depth, cm below ground surface, in cm (positive values represent levels above ground surface and negative values represent levels below ground surface);
elev_m_asl (alias 'Elevation above mean sea level') = elevation, m above sea level, in m; and
Sample_Int = sample interval, in hours.

All missing data were originally assigned the value "-9999"; during database development this code was changed to "null"

Depths below ground surface and elevations above mean sea level for periods where the water table was below the detection limit of the sensor have been assigned the value "dry"
Entity_and_Attribute_Detail_Citation:
None
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Metadata_Reference_Information:
Metadata_Date: 20160212
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Southern Research Station, Center for Forested Wetlands Research
Contact_Person: Andy Harrison
Contact_Position: Hydrology Technician
Contact_Address:
Address_Type: mailing and physical
Address: 3734 Hwy 402
City: Cordesville
State_or_Province: SC
Postal_Code: 29434
Country: USA
Contact_Voice_Telephone: 843 336-5603
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
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