Data Package Metadata View Summary

Time series of dissolved methane and carbon dioxide concentrations for Falling Creek Reservoir and Beaverdam Reservoir in southwestern Virginia, USA during 2015-2023

General Information

Data Package:

Local Identifier:

edi.997.8

Title:

Time series of dissolved methane and carbon dioxide concentrations for Falling Creek Reservoir and Beaverdam Reservoir in southwestern Virginia, USA during 2015-2023

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

Surface samples and depth profiles of carbon dioxide and methane concentrations were sampled from 2015 to 2023 in two drinking water reservoirs in southwestern Virginia, USA: Beaverdam Reservoir (Vinton, Virginia) and Falling Creek Reservoir (Vinton, Virginia). Both reservoirs are owned and operated by the Western Virginia Water Authority as primary or secondary drinking water sources for Roanoke, Virginia. The dataset consists of depth profiles of dissolved greenhouse gas (carbon dioxide, methane) samples measured at the deepest site of each reservoir adjacent to the dam. Additional surface samples were collected at a gauged weir on Falling Creek Reservoir's primary inflow tributary, from a wetland adjacent to Falling Creek Reservoir, and from the reservoir outflow. At Beaverdam Reservoir, additional samples were collected at three outflow points below the dam and at the mid-reservoir outflow. Samples were collected approximately fortnightly from March-April, weekly from May-October, and monthly in November-February at Falling Creek Reservoir and Beaverdam Reservoir. In 2019, surface samples along the stream and reservoir continuum from both Falling Creek Reservoir and Beaverdam Reservoir were collected monthly during the summer stratified period (see site descriptions file for geographic coordinates of sampling sites).

Publication Date:

2024-01-12

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

2015-03-31

End:

2023-12-04

People and Organizations
Contact:	Carey, Cayelan C. (Virginia Tech) [ email ]
Creator:	Carey, Cayelan C. (Virginia Tech)
Creator:	Breef-Pilz, Adrienne (Virginia Tech)
Creator:	Niederlehner, B. R. (Virginia Tech)
Creator:	Lewis, Abigail S.L. (Virginia Tech)
Creator:	Haynie, George (Virginia Tech)
Creator:	Kricheldorf, Michael (Virginia Tech)
Creator:	Keverline, Ryan (Virginia Tech)
Creator:	Tipper, Evelyn (Virginia Tech)

Data Entities
Data Table Name:	GHG_2015_2023
Description:	GHG Dataset
Data Table Name:	site_descriptions
Description:	Descriptions of sites in this dataset with lat/long coordinates
Other Name:	GHG_qaqc_2023_2023
Description:	R script for GHG QA/QC to generate L1 in 2023
Other Name:	GHG_functions_for_L1
Description:	functions used in the L1 generation script for QA/QC in 2923
Other Name:	GHG_inspection_2015_2023
Description:	script to generate plots and combine L1 and EDI products
Other Name:	GHG_Maintenance_Log
Description:	Maintenance log used in L1 generation

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/997/8/454c11035c491710243cae0423efbe7b
Name:	GHG_2015_2023
Description:	GHG Dataset
Number of Records:	6953
Number of Columns:	10

Table Structure

Object Name:

GHG_2015_2023.csv

Size:

416656 bytes

Authentication:

234ef77d656ac69ff2f56121e94fc888 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Reservoir

Site

DateTime

Depth_m

Rep

CH4_umolL

CO2_umolL

Flag_DateTime

Flag_CH4_umolL

Flag_CO2_umolL

Definition:

Three-letter code corresponding to sampled reservoir; FCR = Falling Creek Reservoir; BVR = Beaverdam Reservoir

Sampling site (see site_descriptions.csv for more information)

Date and time of sampling. All data were collected in the eastern time zone of the U.S.A., with daylight savings time observed

Water depth where the sample was collected

Field replicates collected at the same site, date, and depth

Dissolved methane concentration

Dissolved carbon dioxide concentration

Flag value for DateTime; 0 = Time recorded; 1 = Time not recorded and set to 12:00

Flag value for methane concentration; 0 = the samples and replicates are good; 1 = Sample was either not collected or was not retained due to issues with the GC; 2 = Sample was below the method detection limit or negative value changed to 0; 3 = The difference between the reps are above the limit of quantification and >30% and <50% different from each other. Both replicates were retained but flagged; 4 = The difference between the reps are above the limit of quantification and >50% different from each other. Both replicates were retained but flagged; 6 = No peak detected and set to 0

Flag value for carbon dioxide concentration; 0 = the samples and replicates are good; 1 = Sample was either not collected or was not retained due to issues with the GC; 2 = Sample was below the method detection limit or negaitve value changed to 0; 3 = The difference between the reps are above the limit of quantification and >30% and <50% different from each other. Both replicates were retained but flagged; 4 = The difference between the reps are above the limit of quantification and >50% different from each other. Both replicates were retained but flagged; 6 = No peak detected and set to 0

Storage Type:

string

float

date

float

string

Measurement Type:

nominal

ratio

dateTime

ratio

nominal

Measurement Values Domain:

Definition

Three-letter code corresponding to sampled reservoir; FCR = Falling Creek Reservoir; BVR = Beaverdam Reservoir

Unit	dimensionless
Type	real
Min	1
Max	200

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

Unit	meter
Type	real
Min	0.1
Max	11

Unit	dimensionless
Type	natural
Min	1
Max	4

Unit	micromolePerLiter
Type	real
Min	0
Max	790.228

Unit	micromolePerLiter
Type	real
Min	0
Max	1474.569

Unit	dimensionless
Type	whole
Min	0
Max	1

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	the samples and replicates are good
Source

Code Definition

Code	1
Definition	Sample was either not collected or was not retained due to issues with the GC
Source

Code Definition

Code	2
Definition	Sample was below the method detection limit or negative value changed to 0
Source

Code Definition

Code	3
Definition	The difference between the reps are above the limit of quantification and >30% and <50% different from each other. Both replicates were retained but flagged
Source

Code Definition

Code	4
Definition	The difference between the reps are above the limit of quantification and >50% different from each other. Both replicates were retained but flagged
Source

Code Definition

Code	6
Definition	No peak detected and set to 0
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	the samples and replicates are good
Source

Code Definition

Code	1
Definition	Sample was either not collected or was not retained due to issues with the GC
Source

Code Definition

Code	2
Definition	Sample was below the method detection limit or negaitve value changed to 0
Source

Code Definition

Code	3
Definition	The difference between the reps are above the limit of quantification and >30% and <50% different from each other. Both replicates were retained but flagged
Source

Code Definition

Code	4
Definition	The difference between the reps are above the limit of quantification and >50% different from each other. Both replicates were retained but flagged
Source

Code Definition

Code	6
Definition	No peak detected and set to 0
Source

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

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/997/8/2130a9b1867cc4d99c2b2f111418dd09
Name:	site_descriptions
Description:	Descriptions of sites in this dataset with lat/long coordinates
Number of Records:	22
Number of Columns:	5

Table Structure

Object Name:

site_descriptions.csv

Size:

3387 bytes

Authentication:

4fc4b257d74e7283959cf6f52319ab68 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Reservoir

Site

Site_description

Latitude

Longitude

Definition:

Three-letter code corresponding to sampled reservoir

Sampling site within each reservoir

Description of sampling site

Site latitude

Site longitude

Storage Type:

string

float

string

float

Measurement Type:

nominal

ratio

nominal

ratio

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	BVR
Definition	Beaverdam Reservoir
Source

Code Definition

Code	FCR
Definition	Falling Creek Reservoir
Source

Unit	dimensionless
Type	real
Min	1
Max	200

Definition

Description of sampling site

Unit	degree
Type	real
Min	37.3021056538632
Max	37.322851

Unit	degree
Type	real
Min	-79.8383
Max	-79.814467

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

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

GHG_qaqc_2023_2023

Entity Type:

unknown

Description:

R script for GHG QA/QC to generate L1 in 2023

Physical Structure Description:

Object Name:

GHG_qaqc_2023_2023.R

Size:

28508 bytes

Authentication:

c566dc493467cfd444ccc9ca893955b0 Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/997/8/b970fa0241317558f68bf677318e2688

Non-Categorized Data Resource

Name:

GHG_functions_for_L1

Entity Type:

unknown

Description:

functions used in the L1 generation script for QA/QC in 2923

Physical Structure Description:

Object Name:

GHG_functions_for_L1.R

Size:

5864 bytes

Authentication:

5e03927c86f94bca5ee23f7cb6f7460e Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/997/8/928dbb61f74562f715d1f468aab9ed69

Non-Categorized Data Resource

Name:

GHG_inspection_2015_2023

Entity Type:

unknown

Description:

script to generate plots and combine L1 and EDI products

Physical Structure Description:

Object Name:

GHG_inspection_2015_2023.Rmd

Size:

9454 bytes

Authentication:

3f9ff1a21a8478e0f02e16365a59b406 Calculated By MD5

Externally Defined Format:

Format Name:

text/x-markdown

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/997/8/dca8595920a9a2638ff33091bfd414bb

Non-Categorized Data Resource

Name:

GHG_Maintenance_Log

Entity Type:

unknown

Description:

Maintenance log used in L1 generation

Physical Structure Description:

Object Name:

GHG_Maintenance_Log.csv

Size:

471 bytes

Authentication:

e87f1d1e630a67c6fc6a66faf6f8a847 Calculated By MD5

Externally Defined Format:

Format Name:

text/csv

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/997/8/1de021a81c1b84bb24c6cb137c963ba1

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:
carey lab controlled vocabulary	greenhouse gas, Virginia Tech, Stream Team, Western Virginia Water Authority, Falling Creek Reservoir, Beaverdam Reservoir, Carey Lab, Virginia Reservoirs LTREB, LTREB, Virginia Reservoirs
cuahsi controlled vocabulary	reservoir, lake
lter controlled vocabulary	depth, methane, carbon dioxide, lakes

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:

This data package includes six data files (GHG_2015_2023.csv), QAQC R script (GHG_qaqc_2023_2023.R), maintenance log (GHG_Maintenance_Log.csv), visual inspection R script (GHG_inspection_2015_2023.Rmd), sampling sites (site_descriptions.csv), and additional scripts (GHG_functions_for_L1.R). The QAQC script includes functions to process data, remove outliers, and apply the maintenance log to clean the data files included in the package (as described below); the visual inspection script provides code for plotting the data files; and the additional scripts include functions used in QAQC.

SAMPLE COLLECTION AND EQUIPMENT

Samples for greenhouse gas (methane, carbon dioxide) analysis were collected from Falling Creek Reservoir and Beaverdam Reservoir between 2015 - 2023. Most sampling occurred between the hours of 9:00 and 15:00; however, some sampling occurred outside of these hours, including some overnight sampling. For more information about nighttime sampling, see Doubek et. al. 2018. Exact sampling times were included in the DateTime column starting in 2018. After 2018, exact times, when recorded during sample collection, are indicated in the DateTime column with a Flag_DateTime value of 0. If exact times were not recorded during sample collection, time was standardized to 12:00 and Flag_DateTime was set to 1. Prior to 2018, sample timestamps for samples collected between approximately 9:00 and 15:00 were standardized to noon and Flag_DateTime was set to 1.

Samples were collected from several routine depths at the deepest holes of both reservoirs (Site = 50 in both reservoirs) including: 0.1, 1.6, 3.8, 5.0, 6.2, 8.0, and 9.0 m in Falling Creek Reservoir and 0.1, 3.0, 6.0, 9.0, and 11.0 m for Beaverdam Reservoir. These sampling depths were chosen to approximately match outtake valves in Falling Creek Reservoir and Beaverdam Reservoir. Samples were collected with a 4-L Van Dorn sampler (Wildlife Supply, Yulee, FL, USA) and transferred to into two replicate 20 mL glass vials without exposure to air and crimp sealed. These routine depth samples were collected approximately fortnightly from March-April, weekly from May-October, and monthly in November-February.

Surface samples from Falling Creek Reservoir were also collected at a gauged weir on the primary inflow (Tunnel Branch) to Falling Creek Reservoir (Site = 100), at the wetland stream (Falling Creek) adjacent to the reservoir (Site = 200), and at the reservoir outflow at the dam (Site = 1.1). In Beaverdam Reservoir, additional surface samples were collected from the several sites at the outflow below the dam (Site = 1.1, 1.2, 1.3, 1.4) and at the Mid-Reservoir Outflow Pipe (Site = 40). These samples were collected approximately fortnightly from May-October and monthly in November-April.

In summer 2019, additional surface samples were collected approximately monthly along the stream and reservoir continuum for both Falling Creek Reservoir and Beaverdam Reservoir as part of the Reservoir Continuum project (Falling Creek Reservoir: Creek Sites = 99, 100, 101, 102, 200; Reservoir Sites = 20, 30, 45, 50; Reservoir Outflow = 1 and Beaverdam Reservoir: Creek Sites = 100, 200; Reservoir Sites = 20, 30, 45, 50; Mid-Reservoir Outflow Pipe = 40). Surface samples were collected via grab samples for all stream and up-stream reservoir locations. All samples were stored on ice and analyzed within 24 hours of collection following McClure et al. (2018).

All sites are described with geographic coordinates in the site_descriptions.csv data file.

SAMPLE ANALYSIS AND EQUIPMENT

Dissolved methane and carbon dioxide concentrations were measured in each water sample on a Gas Chromatograph (GC) with a Flame Ionization Detector (FID) and Thermal Conductivity Detector (TCD) following McClure et al. (2018). Briefly, immediately prior to analysis, a 2-mL headspace was created with Helium (He) by displacing 2-mL of sample water. The headspace was equilibrated by shaking each 20-mL vial at 300 rpm for 15 minutes. The 2-mL headspace was then injected into the GC. The oven temperature was set to 35 degrees C with a carrier gas (He) flow rate of 15 mL/min. CH4 had a retention time of 1.3 min on the FID and CO2 had a retention time of 2.8 min on the TCD. Dissolved concentrations of CH4 and CO2 in water were calculated using the observed head-space concentrations and Henry's Law (McClure et al. 2018). From 2015-2018, samples were analyzed on a GC SRI, Model 8010. From 2019-onwards, samples were analyzed on a Shimadzu Nexis GC-2030.

DATA FLAGS

Replicate samples (Rep 1 and 2) were often collected for each Date, Site, and Depth. If a second rep was not collected, the data was flagged as '1' (sample was not collected). If the analyzed sample had a value below the minimum detection limit (MDL) the sample was flagged as '2' (sample below MDL). A running MDL was calculated for each GC separately (2015-2018, GC SRI, Model 8010; 2019-onwards, Shimadzu Nexis GC-2030) from routinely measured air concentrations throughout the year (2015-2021) or a reference gas tank (2022-2023) and calculated using a consistent temperature (2015-2018 20 deg C; 2019-2023 40 deg C) and pressure (30 psi). MDL for each year is presented; 2015 CH4 = 0.001 umol/L, CO2 = 2.13 umol/L; 2016 CH4 = 0.006 umol/L, CO2 = 4.45 umol/L; 2017 CH4 = 0.005 umol/L, CO2 = 12.70 umol/L; 2018 CH4 = 0.005 umol/L, CO2 = 21.84 umol/L; 2019 CH4 = 0.011 umol/L, CO2 = 5.08 umol/L; 2020 CH4 = 0.013 umol/L, CO2 = 6.17 umol/L; 2021 CH4 = 0.021 umol/L, CO2 = 5.74 umol/L; 2022 CH4 = 0.0107 umol/L, CO2 = 3.848 umol/L. Replicates of each sample were assessed after sample analysis using calculated percent difference between replicate samples as well as the limit of quantification (LOQ = 3*MDL). If the difference between replicate samples was < LOQ, then the samples were not flagged ('0', samples are good). If the difference between samples was >LOQ and the percent difference between replicate samples was <30%, then the samples were not flagged ('0', samples are good). If the difference between samples was >LOQ and the percent difference between replicates was >30% but <50%, then the samples were flagged as '3' (difference between reps is above LOQ and above 30% difference and below 50% difference). If the difference between samples was >LOQ and the percent difference between replicates was >50%, then the samples were flagged '4' (difference between reps is above the LOQ and above 50% different). For all flags, replicates were retained in the dataset.

DATA PACKAGE UPDATES

We note several updates to the current data package following multiple revisions of earlier versions of this dataset. First, we now set any negative greenhouse gas values (methane or carbon dioxide) to zero, following best practices. Any samples that had a negative value have been flagged '3'. In addition, we standardized the calculation of MDLs for both methane and carbon dioxide to include a running MDL for all air samples analyzed during each respective year. Importantly, all MDLs are now calculated using a standard temperature (2015-2018 = 20 deg C; 2019-2023 = 40 deg C) and pressure (30 PSI).

WHOLE-ECOSYSTEM EXPERIMENTS

Multiple whole-ecosystem experiments have been conducted at Falling Creek Reservoir, including intermittent operation of hypolimnetic oxygenation (HOx) and pulsed epilimnetic mixing (EM) engineering systems. We encourage you to contact the lead author of the data package for more information.

REFERENCES

Doubek J.P., Campbell K.L., Doubek K.M., Hamre K.D., Lofton M.E., McClure R.P., Ward N.K., Carey C.C. (2018). The effects of hypolimnetic anoxia on the diel vertical migration of freshwater crustacean zooplankton. Ecosphere, 9(7):02332. https://doi.org/10.1002/ecs2.2332

McClure R.P., Hamre K.D., Niederlehner B.R., Munger Z.W., Chen S., Lofton M.E., Schreiber M.E., Carey C.C. (2018). Metalimnetic oxygen minima alter the vertical profiles of carbon dioxide and methane in a managed freshwater reservoir. Science of the Total Environment, 636. pp. 610-620. https://doi.org/10.1016/j.scitotenv.2018.04.255

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Individual:

Adrienne Breef-Pilz

Organization:

Virginia Tech

Email Address:

abreefpilz@vt.edu

Id:

https://orcid.org/0000-0002-6759-0063

Individual:

B. R. Niederlehner

Organization:

Virginia Tech

Email Address:

bniederl@vt.edu

Id:

https://orcid.org/0000-0002-6933-336X

Individual:

Abigail S.L. Lewis

Organization:

Virginia Tech

Email Address:

aslewis@vt.edu

Id:

https://orcid.org/0000-0001-9933-4542

Individual:	George Haynie
Organization:	Virginia Tech

Individual:	Michael Kricheldorf
Organization:	Virginia Tech

Individual:	Ryan Keverline
Organization:	Virginia Tech

Individual:	Evelyn Tipper
Organization:	Virginia Tech

Contacts:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2015-03-31

End:

2023-12-04

Geographic Region:

Description:

Beaverdam Reservoir is located in Vinton, Virginia, USA

Bounding Coordinates:

Northern:	37.322865	Southern:	37.311961
Western:	-79.824834	Eastern:	-79.813848

Geographic Region:

Description:

Falling Creek Reservoir is located in Vinton, Virginia, USA

Bounding Coordinates:

Northern:	37.309589	Southern:	37.30266
Western:	-79.839249	Eastern:	-79.836009

Project

Parent Project Information:

Title:

No project title to report

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

Western Virginia Water Authority

Related Project:

Title:

Collaborative Research: Consequences of changing oxygen availability for carbon cycling in freshwater ecosystems

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

National Science Foundation 1753639

Related Project:

Title:

Collaborative Research: CIBR: Cyberinfrastructure Enabling End-to-End Workflows for Aquatic Ecosystem Forecasting

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

National Science Foundation 1933016

Related Project:

Title:

Collaborative Research: URoL:ASC: Applying rules of life to forecast emergent behavior of phytoplankton and advance water quality management National Science Foundation

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

2318861

Related Project:

Title:

LTREB: Integrating real-time open data pipelines and forecasting to quantify ecosystem predictability at day to decadal scales National Science Foundation

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

Cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

2327030

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Additional Info

Additional Information:

Contributions to the 2023 revision:

CCC developed and led the reservoir monitoring program. ABP led the 2023 field crew, contributed substantially to fieldwork, and updated QA/QC workflows and initiated the new workflow. BRN performed sample analyses. ASL contributed to fieldwork, QAQC, and data collation. ET, GH, MK, and RK contributed to fieldwork, data digitization, and field monitoring preparations in 2023.

Acknowledgments and historical contributions:

This data package has been iteratively updated over time and builds on the many historical contributions of co-authors listed in previous revisions. We thank the Western Virginia Water Authority for providing access to these sites, the Reservoir Group for contributing to fieldwork, and Bibek Kandel for a helpful review of this data package.

Other Metadata

Additional Metadata

additionalMetadata
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        |     |___element 'unitList'
        |     |     |___text '\n            '
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        |     |     |     |  \___attribute 'multiplierToSI' = '1.00E-06'
        |     |     |     |  \___attribute 'name' = 'micromolePerLiter'
        |     |     |     |  \___attribute 'parentSI' = 'molarity'
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        |     |     |     |___text '\n               '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'micromole per liter'
        |     |     |     |___text '\n            '
        |     |     |___text '\n         '
        |     |___text '\n      '
        |___text '\n   '

Additional Metadata

additionalMetadata
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        |     |___text '\n         '
        |     |___element 'emlEditor'
        |     |     |___text '\n            '
        |     |     |___element 'app'
        |     |     |     |___text 'EMLassemblyline'
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        |     |     |     |___text '3.5.5'
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        |___text '\n   '

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Data Package Metadata View Summary

Time series of dissolved methane and carbon dioxide concentrations for Falling Creek Reservoir and Beaverdam Reservoir in southwestern Virginia, USA during 2015-2023

Data Entities

Data Table

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

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

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Time series of dissolved methane and carbon dioxide concentrations for Falling Creek Reservoir and Beaverdam Reservoir in southwestern Virginia, USA during 2015-2023

+/- Data Entities

Data Table

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

+/- 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

+/- 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

Additional Metadata