Data Package Metadata View Summary

High-frequency time series of stage height, stream discharge, and water quality (specific conductivity, dissolved oxygen, pH, temperature, turbidity) for Stroubles Creek in Blacksburg, Virginia, USA 2013-2018

General Information

Data Package:
Local Identifier:	edi.13.3
Title:	High-frequency time series of stage height, stream discharge, and water quality (specific conductivity, dissolved oxygen, pH, temperature, turbidity) for Stroubles Creek in Blacksburg, Virginia, USA 2013-2018
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	A pressure transducer (CS450, Campbell Scientific Inc., Logan, UT, USA) and a multi-parameter water quality sonde (YSI Series 6:6920 v2, YSI Inc., Yellow Springs, OH, USA) were deployed by the Virginia Tech Biological Systems Engineering (BSE) Stream Research, Education, and Management (StREAM) Lab (vtstreamlab.weebly.com/) from December 2012 to December 2018 to assess stage and water quality, and calculate discharge in Stroubles Creek, Blacksburg, VA (4118326.215 N, 549236.02 W). Stroubles Creek is a 19 km tributary of the New River in Blacksburg, Virginia, USA. Stroubles Creek begins immediately below the Virginia Tech campus and flows north into the Kanawha River in the Valley and Ridge physiographic province. Stroubles Creek was a historic water supply for the town of Blacksburg and remains a highly visible waterway in the town, as it traverses both the downtown area and much of the Virginia Tech campus. In 2002, Stroubles Creek was placed on Virginia’s 303(d) list of impaired water bodies with a benthic impairment by the Virginia Department of Environmental Quality (VADEQ). A total maximum daily load (TMDL) plan was subsequently developed in 2003 for the stream in collaboration with Virginia Tech’s BSE department, the Virginia Department of Environmental Quality, and the Virginia Department of Conservation and Recreation. During 2008-2010, a 2.1 km reach of Stroubles Creek, mostly upstream of the StREAM Lab, was restored by means of cattle exclusion, natural revegetation, bank reshaping, and creating an inset floodplain. The water quality dataset provided here is associated with the upper Stroubles Creek watershed which drains approximately 14.5 km2. Currently, data from the StREAM Lab are used by 8-10 faculty and their graduate students in 7 departments across 5 colleges at Virginia Tech for research and at least 16 classes for field labs and/or assignments.
Publication Date:	2020-05-08

Time Period

Begin:

2013-01-01

End:

2018-12-31

People and Organizations
Contact:	Hession, William C. (Virginia Tech) [ email ]
Creator:	Hession, William C. (Virginia Tech)
Creator:	Lehmann, Laura T. (Virginia Tech)
Creator:	Wind, Lauren L. (Virginia Tech)
Creator:	Lofton, Mary E. (Virginia Tech)

Data Entities
Data Table Name:	Stage height and stream discharge data
Description:	Stroubles Creek StREAM Lab Bridge 1 Stage Height and Stream Discharge Dataset 2013-2018
Data Table Name:	Water quality data
Description:	Stroubles Creek StREAM Lab Bridge 1 Water Quality Dataset 2013-2018

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/13/3/d9418718bcf8d266919ceb74cdb01295
Name:	Stage height and stream discharge data
Description:	Stroubles Creek StREAM Lab Bridge 1 Stage Height and Stream Discharge Dataset 2013-2018
Number of Records:	359583
Number of Columns:	6

Table Structure

Object Name:

stage.csv

Size:

16670072 bytes

Authentication:

7ea235ab5cb706357140df244ed344e6 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Site

DateTime

Lvl_m

Discharge_cms

Flag_Lvl_m

Flag_Discharge_cms

Definition:

Name of sampling site on Stroubles Creek where pressure transducer and water quality sonde were deployed; B1 = Bridge 1

Date and time of sampling. All data were collected in the eastern time zone of the U.S.A. (EST), with no daylight savings time observed

Water depth at the time of sonde measurement

Stream discharge at the time of sonde measurement, calculated according to equations 1 and 2 (see metadata Methods and Protocols)

Data flag for Level_m; 0 = no flag; 1 = instrument malfunction

Data flag for Discharge_cms; 0= no flag; 1 = instrument malfunction

Storage Type:

string

date

float

Measurement Type:

nominal

dateTime

ratio

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	B1
Definition	StREAM Lab Bridge 1 on Stroubles Creek
Source

Format	YYYY-MM-DD hh:mm:ss
Precision

Unit	meter
Type	real
Min	0.041
Max	1.815

Unit	cubicMetersPerSecond
Type	real
Min	0.008527297
Max	17.58769

Unit	dimensionless
Type	whole
Min	0
Max	0

Unit	dimensionless
Type	whole
Min	0
Max	0

Missing Value Code:

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/13/3/514f95d68fb081a320cc89853fa62b0c
Name:	Water quality data
Description:	Stroubles Creek StREAM Lab Bridge 1 Water Quality Dataset 2013-2018
Number of Records:	199671
Number of Columns:	16

Table Structure

Object Name:

WQ.csv

Size:

14670656 bytes

Authentication:

bbb72ffb9b9bfc996b0ae12d9c0948c1 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Site

DateTime

Temp_degC

SpCond_uScm

Turb_NTU

DO_pct

DO_mgL

Batt_V

Flag_Temp_degC

Flag_SpCond_uScm

Flag_pH

Flag_Turb_NTU

Flag_DO_pct

Flag_DO_mgL

Flag_Batt_V

Definition:

Name of sampling site on Stroubles Creek where pressure transducer and water quality sonde were deployed; B1 = Bridge 1

Date and time of sampling. All data were collected in the eastern time zone of the U.S.A. (EST), with no daylight savings time observed

Water temperature

Specific conductivity

Turbidity in nephelometric turbidity units

percent saturation of dissolved oxygen

concentration of dissolved oxygen

battery voltage

Data flag for Temp_degC. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Data flag for SpCond_uScm. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Data flag for pH. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Data flag for Turb_NTU. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Data flag for DO_pct. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Data flag for DO_mgL. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Data flag for Batt_V. For observations where multiple flag codes apply, flags are combined, e.g. 13, 12, 123. 0 = no flag; 1 = instrument malfunction; 2 = calibration day; 3= sonde out of water

Storage Type:

string

date

float

Measurement Type:

nominal

dateTime

ratio

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	B1
Definition	StREAM Lab Bridge 1 on Stroubles Creek
Source

Format	YYYY-MM-DD hh:mm:ss
Precision

Unit	celsius
Type	real
Min	-4.62
Max	33.47

Unit	microSiemenPerCentimeter
Type	integer
Min	-280
Max	5424

Unit	dimensionless
Type	real
Min	-9.99
Max	9.1

Unit	dimensionless
Type	real
Min	-1000
Max	7999

Unit	dimensionless
Type	real
Min	-99.9
Max	1000

Unit	milligramsPerLiter
Type	real
Min	-100
Max	1000

Unit	volt
Type	real
Min	0
Max	15.4

Unit	dimensionless
Type	whole
Min	0
Max	12

Unit	dimensionless
Type	whole
Min	0
Max	23

Unit	dimensionless
Type	whole
Min	0
Max	123

Unit	dimensionless
Type	whole
Min	0
Max	123

Unit	dimensionless
Type	whole
Min	0
Max	12

Unit	dimensionless
Type	whole
Min	0
Max	12

Unit	dimensionless
Type	whole
Min	0
Max	12

Missing Value Code:

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
StREAM lab controlled vocabulary	Virginia Tech, StREAM Lab, Biological Systems Engineering, Blacksburg VA, Stroubles Creek, total maximum daily load
lter controlled vocabulary	stream, stream discharge, turbidity, water temperature, conductivity, specific conductivity, pH, dissolved oxygen, water quality, stage height

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

In December 2012, a YSI Series 6:6920 v2 (Yellow Springs, OH, USA) sonde was placed at Bridge 1 (37.210125, -80.445106) within the StREAM Lab at Stroubles Creek to continuously record water quality parameters every 15 min. The water quality parameters included: battery voltage (volts), dissolved oxygen (mg/L, %), pH, conductivity (microsiemens/cm), turbidity (NTU), temperature (degrees C). Additionally, a CS450 (Campbell Scientific Inc., Logan, UT, USA) pressure transducer was installed to continuously-record stream stage height (m) every 10 min. Discharge was calculated at Bridge 1 based on a known stage-discharge relationship or rating curve established by StREAM Lab (EQ1, EQ2).

EQ1. If 0 m < x < 0.7 m, then y = 4.8292x^1.9887 EQ2. If x > 0.7 m, then y = 13.559x - 7.0945

The YSI sonde and CS pressure transducer were calibrated as outlined in the user manuals approximately every two weeks, dependent on weather. The continuous water quality and stage/discharge datasets from 2012-2018 were cycled through a scrutinous quality assurance (QA) and quality control (QC) process to flag suspect data. The following three flags were processed: (1) instrument malfunction, (2) sonde calibration days, and (3) sensor not in water (low flow). Data were also filtered for duplicate data entries and NaN values.

INSTRUMENT MALFUNCTION: Sensor data were flagged as suspect based on known sonde limitations, sensor error codes, or feasibility of the recorded value being accurate. Sensors were flagged for instrument malfunction (flag of 1) according to the following values: Water level and discharge data were flagged if the water level was greater than 4 m, as this indicates overtopping of the banks of Stroubles Creek and renders the stage-discharge relationships inaccurate for calculating discharge. Temperature data were flagged if reported as below 5 degrees C or above 30 degrees C. Conductivity data were flagged if negative. pH data were flagged if below 0 or above 14. Percent saturation of dissolved oxygen data were flagged if negative or above 150%. Milligrams per liter of dissolved oxygen data were flagged if negative or above 18 mg/L. Battery voltage data were flagged if below 11 or above 13, as this represents sub-optimal battery function which could potentially compromise sonde water quality readings. Sensor error codes on the pressure transducer and water quality sondes result in readings of -9999. These readings were also flagged for instrument malfunction.

SONDE CALIBRATION DAYS: The YSI sonde and CS pressure transducer were calibrated as outlined in the user manuals approximately every two weeks, dependent on weather. While calibration typically only involves removing the sonde from the water for one or two hours at most, and occasionally not all sensors were re-calibrated on every calibration day, all data from calibration days have been flagged for all sensors as a precaution (flag of 2). Calibration days in 2016 were not recorded and are not flagged in the dataset. This flag only applies to the water quality dataset, not the stage and discharge dataset.

LOW FLOW: After sonde deployment, it was determined that due to low base flow in Stroubles Creek, certain water quality sensors were not constantly submerged in water, compromising water quality data values. Specifically, the stage for annual low base flow in Stroubles Creek is ~0.13 m, while the turbidity sensor on the water quality sonde rests at 0.16 m, the pH sensor rests at 0.2 m, and the conductivity sensor rests at 0.26 m. To flag water quality sensor data that were recorded while the sonde was likely out of the water, stage data were interpolated to produce records every fifteen minutes to align with the water quality sonde records, and the datasets were merged by meridian offset time. Sensor data that were recorded when the stage was below the height of the sensor were flagged (flag of 3). This flag only applies to the water quality dataset, not the stage and discharge dataset.

INSTRUMENTS, MANUALS, AND SERIAL NUMBERS FOR SONDES USED IN 2013-2018:

YSI Series 6 6920 v2 Water Quality Sonde (January 2013- December 2018) https://www.ysi.com/File%20Library/Documents/Manuals/069300-YSI-6-Series-Manual-RevJ.pdf

CS450 Pressure Transducer (January 2013- December 2018) https://s.campbellsci.com/documents/ca/manuals/cs450-cs455_man.pdf

People and Organizations

Creators:

Individual:

William C. Hession

Organization:

Virginia Tech

Email Address:

chession@vt.edu

Id:

https://orcid.org/0000-0002-6323-3827

Individual:

Laura T. Lehmann

Organization:

Virginia Tech

Email Address:

lauteany@vt.edu

Id:

https://orcid.org/0000-0001-8409-1103

Individual:

Lauren L. Wind

Organization:

Virginia Tech

Email Address:

wlauren@vt.edu

Id:

https://orcid.org/0000-0002-0805-1086

Individual:

Mary E. Lofton

Organization:

Virginia Tech

Email Address:

melofton@vt.edu

Id:

https://orcid.org/0000-0003-3270-1330

Contacts:

Individual:

William C. Hession

Organization:

Virginia Tech

Email Address:

chession@vt.edu

Id:

https://orcid.org/0000-0002-6323-3827

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2013-01-01

End:

2018-12-31

Geographic Region:

Description:

StREAM Lab

Bounding Coordinates:

Northern:	37.238816	Southern:	37.210012
Western:	-80.44526	Eastern:	-80.393528

Sampling Site:

Description:

Site Coordinates:

Longitude (degree):

-80.445106

Latitude (degree):

37.210125

Project

Parent Project Information:

Title:

State Council for Higher Education for Virginia (SCHEV)

Personnel:

Individual:

William C. Hession

Organization:

Virginia Tech

Email Address:

chession@vt.edu

Id:

https://orcid.org/0000-0002-6323-3827

Role:

Principal Investigator

Funding:

SCHEV

Related Project:

Title:

Virginia Tech Equipment Trust Fund (VT ETF)

Personnel:

Individual:

William C. Hession

Organization:

Virginia Tech

Email Address:

chession@vt.edu

Id:

https://orcid.org/0000-0002-6323-3827

Role:

Principal Investigator

Funding:

VT ETF

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Additional Info


Additional Information:
	For further information about efforts to improve the Stroubles Creek watershed, please navigate to the following link: https://create.piktochart.com/output/20516777-scip-infographicfeb2017

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microSiemenPerCentimeter'
        |     |     |     |  \___attribute 'multiplierToSI' = '1.00E-04'
        |     |     |     |  \___attribute 'name' = 'microSiemenPerCentimeter'
        |     |     |     |  \___attribute 'parentSI' = 'siemenPerMeter'
        |     |     |     |  \___attribute 'unitType' = 'specific conductivity'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'microSiemenPerCentimeter'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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Data Package Metadata View Summary

High-frequency time series of stage height, stream discharge, and water quality (specific conductivity, dissolved oxygen, pH, temperature, turbidity) for Stroubles Creek in Blacksburg, Virginia, USA 2013-2018

Data Entities

Data Table

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Info

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

High-frequency time series of stage height, stream discharge, and water quality (specific conductivity, dissolved oxygen, pH, temperature, turbidity) for Stroubles Creek in Blacksburg, Virginia, USA 2013-2018

+/- Data Entities

Data Table

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Info

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Info

Additional Metadata