Santee Experimental Forest Watershed 80 Daily Mean Flow Data, 1968-1999

Metadata:

Identification_Information
Data_Quality_Information
Entity_and_Attribute_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Amatya, Devendra M. and Trettin, Carl C.
Publication_Date: 2012
Title:
Geospatial_Data_Presentation_Form: database

Description:

Abstract:: This data product contains daily mean flow rates (liters per second) measured at the Watershed 80 weir on the Santee Experimental Forest near Cordesville, SC from 1968 to 1999. Watershed 80 is a 160 ha first-order control watershed that was established in 1968 as part of a paired watershed system (Watershed 77 was established in 1963 and became the treatment watershed). The original watershed area was 206 ha, but on November 6, 2001 a culvert was installed across Yellowjacket Road draining a portion of Watershed 80 into Watershed 79, thus reducing its area. Elevation ranges from 4 to 10 meters above sea level, and average watershed slope is 3%. The stream channel is approximately 1375 meters long, and stage is monitored at the watershed outlet using a compound v-notch weir made of metal and concrete.

The predominant forest cover types on Watershed 80 are pine and mixed hardwoods. About 30 % of the watershed is covered by wetlands, comprising bottomland hardwoods and wet pine flats. Although the watershed serves as a control for treatments imposed on Watershed 77, Watershed 80 did experience the effects of Hurricane Hugo in September 1989.
Purpose:: The purpose of Watershed 80 when established in 1968 was to serve as a control site for research on the effects of management treatments (taking place since 1976 on Watershed 77, the treatment watershed) such as thinning and prescribed burns on the hydrology, water quality, soils and vegetation of low gradient, poorly drained forested watersheds in the SC Coastal Plain.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1968
Ending_Date: 1999

Currentness_Reference:

ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Description_of_Geographic_Extent:

The geographic area covered by the dataset is that defined by the boundary of Watershed 80 in the Santee Experimental Forest.

Bounding_Coordinates:

West_Bounding_Coordinate: -79.78153
East_Bounding_Coordinate: -79.76300
North_Bounding_Coordinate: 33.15007
South_Bounding_Coordinate: 33.13284

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Forested wetlands
Theme_Keyword: Poorly drained soils
Theme_Keyword: Outflow (runoff)

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/.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: Prior to September 1995, stage was measured at 15-minute intervals using an ADR device accurate to the nearest 0.01 foot. Submerged flow (if any) was measured using an FW-1 recorder. Daily mean flow values were calculated by translating the ADR tapes for 15-minute stage values, using these values with stage-discharge relationship equations for the weir in a Fortran program and then averaging these values to obtain the daily mean flow rates. A staff gauge was mounted on the face of the blockhouse to allow direct comparison of stage data to manual readings.

A Teledyne-ISCO 3210 flowmeter with an ultrasonic sensor was installed in September 1995, and it recorded stage with an accuracy of 0.01 foot. SAS software was used to calculate 15-minute and daily mean flow rates.

Logical_Consistency_Report:

Visual inspection and comparison with flow data from other SEF stations (as well as daily rainfall data) were used to expose anomalous data.

Completeness_Report:

Flow monitoring was discontinued starting 11/1/81 but was resumed on 11/1/89 following the devastation caused by Hurricane Hugo on 9/21/89. Since then there have been a number of brief periods with missing data, largely the result of equipment failures or personnel vacancies.

Lineage:

Methodology:

Methodology_Type: Field
Methodology_Description:: In 1968 the Forest Service constructed a compound v-notch weir (metallic weir installed on top of a concrete wall) and associated blockhouse (to house monitoring instruments) at the Watershed 80 outlet on Yellowjacket Road. Stage data were recorded on tapes at 15-minute intervals by analog-to-digital water level recording (ADR) equipment.

In September 1995 the ADR equipment was replaced by a Teledyne-ISCO 3210 flowmeter. 15-minute stage data was downloaded directly to a computer in the field using Flowlink 3 software.

Process_Step:

Process_Description:: Prior to September 1995, the ADR tape data were read (picked by hand or translated to ASCII code using a photoelectric reader) and 15-minute stage values were converted to the corresponding flow values using stage-discharge relationships for the weir in a Fortran program. Daily mean flow rates were generated by averaging the 15-minute flow rates.

In September 1995 the ADR equipment was replaced by a Teledyne-ISCO 3210 flowmeter. 15-minute stage data was downloaded directly to a computer in the field using Flowlink 3 software. SAS software and the stage-discharge relationship were used to generate 15-minute and daily mean flow rates from the recorded stage data.
Process_Date: Unknown

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:: Variables included in the dataset WS80_historical_data.xlsx:

Location = watershed name (WS80 = Watershed 80);
Instr_ID = gauging station name (Weir80 = water level recorder used in conjunction with WS80 weir);
Date_ = date associated with stage data (format MM/DD/YYYY); and
Dailyflow_ = daily mean flow rate, in L/sec.

All missing data were originally assigned the value "-9999"; during database development this code was changed to "null"
Entity_and_Attribute_Detail_Citation:: None

Metadata_Reference_Information:

Metadata_Date: 20130222

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