Data Package Metadata View Summary

Time series of high-frequency sensor data measuring water temperature, dissolved oxygen, pressure, conductivity, specific conductance, total dissolved solids, chlorophyll a, phycocyanin, and fluorescent dissolved organic matter at discrete depths in Falling Creek Reservoir, Virginia, USA in 2018-2020

General Information

Data Package:
Local Identifier:	edi.85.7
Title:	Time series of high-frequency sensor data measuring water temperature, dissolved oxygen, pressure, conductivity, specific conductance, total dissolved solids, chlorophyll a, phycocyanin, and fluorescent dissolved organic matter at discrete depths in Falling Creek Reservoir, Virginia, USA in 2018-2020
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Depth profiles of water temperature on 1-m intervals from 0.1 to 9 m depth; dissolved oxygen at 5 and 9 m depth; pressure at 9 m depth; and temperature, dissolved oxygen, conductivity, specific conductance, chlorophyll a, phycocyanin, total dissolved solids, fluorescent dissolved organic matter, and pressure at ~1.6 m depth were collected with a suite of high-frequency sensors at Falling Creek Reservoir (Vinton, Virginia, USA) on the 10-minute scale in 2018-2020. Falling Creek Reservoir is owned and managed by the Western Virginia Water Authority as a primary drinking water source for Roanoke, Virginia. This data product consists of one dataset compiled from water temperature data measured at multiple depths by thermistors, two dissolved oxygen sensors at multiple depths, pressure measured at one depth, and a sonde that measures temperature, dissolved oxygen, pressure, conductivity, specific conductance, chlorophyll a, phycocyanin, total dissolved solids, and fluorescent dissolved organic matter measured at the deepest site of the reservoir adjacent to the dam.
Publication Date:	2021-01-15

Time Period

Begin:

2018-07-05

End:

2020-12-31

People and Organizations
Contact:	Carey, Cayelan C. (Virginia Tech) [ email ]
Creator:	Carey, Cayelan C. (Virginia Tech)
Creator:	Woelmer, Whitney M . (Virginia Tech)
Creator:	Lewis, Abigail S. L. (Virginia Tech)
Creator:	Breef-Pilz, Adrienne (Virginia Tech)
Creator:	Howard, Dexter W. (Virginia Tech)
Creator:	Bookout, Bethany J. (Virginia Tech)
Associate:	Guo, Wentao

Data Entities
Data Table Name:	Catwalk_EDI_2020.csv
Description:	FCR Catwalk Sensor String
Other Name:	temp_oxy_chla_qaqc.R
Description:	Automated QAQC script
Other Name:	catwalk_EDI_QAQC_all_variables.R
Description:	Final script to run QAQC
Other Name:	CAT_MaintenanceLog_2020.txt
Description:	Maintenance log for catwalk sensors

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/85/7/c1b1f16b8e3edbbff15444824b65fe8f
Name:	Catwalk_EDI_2020.csv
Description:	FCR Catwalk Sensor String
Number of Records:	130597
Number of Columns:	63

Table Structure

Object Name:

Catwalk_EDI_2020.csv

Size:

44892531 bytes

Authentication:

58b8b73eb1fd388162669dc2a2484200 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

ThermistorTemp_C_surface

ThermistorTemp_C_1

ThermistorTemp_C_2

ThermistorTemp_C_3

ThermistorTemp_C_4

ThermistorTemp_C_5

ThermistorTemp_C_6

ThermistorTemp_C_7

ThermistorTemp_C_8

ThermistorTemp_C_9

RDO_mgL_5

RDOsat_percent_5

RDO_mgL_5_adjusted

RDOsat_percent_5_adjusted

RDOTemp_C_5

RDO_mgL_9

RDOsat_percent_9

RDO_mgL_9_adjusted

RDOsat_percent_9_adjusted

RDOTemp_C_9

EXOTemp_C_1

EXOCond_uScm_1

EXOSpCond_uScm_1

EXOTDS_mgL_1

EXODOsat_percent_1

EXODO_mgL_1

EXOChla_RFU_1

EXOChla_ugL_1

EXOBGAPC_RFU_1

EXOBGAPC_ugL_1

EXOfDOM_RFU_1

EXOfDOM_QSU_1

EXO_pressure

EXO_depth

EXO_battery

EXO_cablepower

EXO_wiper

Lvl_psi_9

LvlTemp_C_9

RECORD

CR6_Batt_V

CR6Panel_Temp_C

Flag_All

Flag_DO_1

Flag_DO_5

Flag_DO_9

Flag_Chla

Flag_Phyco

Flag_TDS

Flag_fDOM

Flag_Temp_Surf

Flag_Temp_1

Flag_Temp_2

Flag_Temp_3

Flag_Temp_4

Flag_Temp_5

Flag_Temp_6

Flag_Temp_7

Flag_Temp_8

Flag_Temp_9

Definition:

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

Sampling site within each reservoir; 50 = Deep hole or site nearest to dam in the reservoir, attached to the catwalk

Date and time of sampling. All data were collected in the eastern standard time zone of the U.S.A., with daylight savings time not observed, GMT -4

water temperature at the surface as measured by the thermistor

water temperature at 1 meter depth as measured by the thermistor; an offset was applied as described in the metadata for October 29, 2020 13:00EST to the end of 2020

water temperature at 2 meter depth as measured by the thermistor

water temperature at 3 meter depth as measured by the thermistor

water temperature at 4 meter depth as measured by the thermistor; an offset was applied as described in the metadata for October 29, 2020 13:00EST to the end of 2020

water temperature at 5 meter depth as measured by the thermistor

water temperature at 6 meter depth as measured by the thermistor

water temperature at 7 meter depth as measured by the thermistor

water temperature at 8 meter depth as measured by the thermistor

water temperature at 9 meter depth as measured by the thermistor

Dissolved Oxygen (DO) concentration at 5 meter depth as measured by the RDO Sensor

Dissolved Oxygen (DO) percent saturation at 5 meter depth as measured by the RDO Sensor

One period in summer 2019 appears to have had extensive fouling on the 5 meter oxygen sonde, as evidenced by inexplicably low oxygen readings. We adjusted these values using linear or square root functions to best match simultaneous readings from a high-resolution CTD profile. This column gives the adjusted values. Added in the 2019 revision.

One period in summer 2019 appears to have had extensive fouling on the 5 meter oxygen sonde, as evidenced by inexplicably low oxygen readings. We adjusted these values using linear or square root functions to best match simultaneous readings from a high-resolution CTD profiler. This column gives the adjusted values. Added in the 2019 revision.

Water temperature as measured by the DO sonde at 5 meter depth as measured by the RDO Sensor

Dissolved Oxygen (DO) concentration at 9 meter depth as measured by the RDO Sensor

Dissolved Oxygen (DO) percent saturation at 9 meter depth as measured by the RDO Sensor

Two periods in summer 2019 and four periods in 2020 appears to have had extensive fouling on the 9 meter oxygen sonde, as evidenced by inexplicably low oxygen readings. We adjusted these values using linear or square root functions to best match simultaneous readings from a high-resolution CTD profiler. This column gives the adjusted values. Added in the 2019 and 2020 revision.

Water temperature as measured by the DO sonde at 9 meter depth as measured by the RDO Sensor

water temperature at 1.6 meter depth as measured by the EXO Sonde

Conductivity at 1.6 meter depth as measured by the EXO Sonde

Specific conductivity at 1 meter depth as measured by the EXO Sonde

Total Dissolved Solids (TDS) at 1.6 meter depth as measured by the EXO Sonde as measured by the EXO Sonde

Dissolved Oxygen percent saturation at 1.6 meter depth as measured by the EXO Sonde

Dissolved Oxygen at 1.6 meter depth as measured by the EXO Sonde

Total Chlorophyll a at 1.6 meter depth as measured by the EXO Sonde

Blue-Green Algae Phyocycanin at 1.6 meter depth as measured by the EXO Sonde

Blue-Green Algae Phycoycanin at 1.6 meter depth as measured by the EXO Sonde

Fluorecent Dissolved Organic Matter at 1.6 meter depth as measured by the EXO Sonde

Fluorescent Dissolved Organic Matter at 1.6 meter depth as measured by the EXO Sonde

Gauge pressure of EXO sonde at 1.6m, measured relative to ambient atmospheric pressure

Depth of the EXO sonde as measured by the EXO sonde.

Voltage of the EXO sonde internal batteries.

Measure of power being used by the cable connected to the CR6 datalogger as measured by the EXO sonde.

Wiper brush cleaning system activation signal as measured by the EXO sonde.

Measure of the pressure from the bottom sensor in the string which is about 9 m

Water temperature at the last sensor in the string (about 9 m) as measured by the pressure transducer

The nth record collected since the instrument was turned on or the program was altered.

The battery voltage of the CR6 at that time

Panel temperature of the CR6 data logger

Data flag for all data parameters (ThermistorTemp_C_surface, ThermistorTemp_C_1, ThermistorTemp_C_2, ThermistorTemp_C_3, ThermistorTemp_C_4, ThermistorTemp_C_5, ThermistorTemp_C_6, ThermistorTemp_C_7, ThermistorTemp_C_8, ThermistorTemp_C_9, RDO_mgL_5, RDOsat_percent_5, RDOTemp_C_5, RDO_mgL_9, RDOsat_percent_9, RDOTemp_C_9, EXOTemp_C_1, EXOCond_uScm_1, EXOSpCond _uScm_1, EXOTDS_mgL_1, EXODOsat_percent_1, EXODO_mgL_1, EXOChla_RFU_1, EXOChla_ugL_1, EXOBGAPC_RFU_1, EXOBGAPC _ugL_1, EXOfDOM_RFU_1, EXOfDOM_QSU_1)

Data flag for EXO DO data at 1 meter depth (EXODOsat_percent_1, EXODO_mgL_1)

Data flag for DO data at 5 meter depth (RDO_mgL_5, RDOsat_percent_5)

Data flag for DO data at 9 meter depth (RDO_mgL_9, RDOsat_percent_9)

Data flag for chlorophyll data (EXOChla_ugL_1 and EXOChla_RFU_1)

Data flag for phycocyanin data (EXOBGAPC _ugL_1)

Data flag for total dissolved solids data (EXOTDS_mgL_1)

Data flag for fluorescent dissolved organic matter data (EXOfDOM_QSU_1 and EXOfDOM_RFU_1)

Data flag for temperature data at 0.1m (ThermistorTemp_C_surface)

Data flag for temperature data at 1m (ThermistorTemp_C_1)

Data flag for temperature data at 2m (ThermistorTemp_C_2)

Data flag for temperature data at 3m (ThermistorTemp_C_3)

Data flag for temperature data at 4m (ThermistorTemp_C_4)

Data flag for temperature data at 5m (ThermistorTemp_C_5)

Data flag for temperature data at 6m (ThermistorTemp_C_6)

Data flag for temperature data at 7m (ThermistorTemp_C_7)

Data flag for temperature data at 8m (ThermistorTemp_C_8)

Data flag for temperature data at 9m (ThermistorTemp_C_9)

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

Unit	dimensionless
Type	natural
Min	50
Max	50

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

Unit	celsius
Type	real
Min	1.103906
Max	32.14754

Unit	celsius
Type	real
Min	1.437647
Max	29.90374

Unit	celsius
Type	real
Min	1.747491
Max	28.73498

Unit	celsius
Type	real
Min	1.905756
Max	25.95062

Unit	celsius
Type	real
Min	2.094415
Max	22.0729

Unit	celsius
Type	real
Min	2.116144
Max	20.38613

Unit	celsius
Type	real
Min	2.272272
Max	19.08856

Unit	celsius
Type	real
Min	2.455377
Max	15.87316

Unit	celsius
Type	real
Min	2.657373
Max	14.43685

Unit	celsius
Type	real
Min	2.876062
Max	13.82519

Unit	milligramsPerLiter
Type	real
Min	0
Max	13.64526

Unit	dimensionless
Type	real
Min	0
Max	104.2325

Unit	milligramsPerLiter
Type	real
Min	0
Max	13.64526

Unit	dimensionless
Type	real
Min	0
Max	104.2325

Unit	celsius
Type	real
Min	2.114845
Max	20.1016

Unit	milligramsPerLiter
Type	real
Min	0
Max	13.75797

Unit	dimensionless
Type	real
Min	0
Max	111.9821

Unit	milligramsPerLiter
Type	real
Min	0
Max	13.75797

Unit	dimensionless
Type	real
Min	0
Max	111.9821

Unit	celsius
Type	real
Min	2.936371
Max	15.40335

Unit	celsius
Type	real
Min	0
Max	29.61

Unit	microSiemensPerCentimeter
Type	real
Min	0
Max	921.93

Unit	microSiemensPerCentimeter
Type	real
Min	0
Max	951

Unit	milligramsPerLiter
Type	real
Min	0
Max	618.15

Unit	dimensionless
Type	real
Min	8.12
Max	220.4

Unit	milligramsPerLiter
Type	real
Min	0.7
Max	17.75

Unit	RelativeFluorescenceUnits
Type	real
Min	-0.02
Max	22.55

Unit	microgramsPerLiter
Type	real
Min	0
Max	90.32

Unit	RelativeFluorescenceUnits
Type	real
Min	-0.05
Max	10.16

Unit	milligramsPerLiter
Type	real
Min	0
Max	10.22

Unit	RelativeFluorescenceUnits
Type	real
Min	1.53
Max	10.5

Unit	QuinineSulfateUnits
Type	real
Min	4.65
Max	31.55

Unit	psig
Type	real
Min	-0.42
Max	3.67

Unit	meter
Type	real
Min	-0.295
Max	2.571

Unit	volt
Type	real
Min	5.66
Max	6.12

Unit	volt
Type	real
Min	0
Max	14.57

Unit	volt
Type	real
Min	1.13
Max	1.653

Unit	psig
Type	real
Min	0.0116388
Max	13.70621

Unit	celsius
Type	real
Min	3.448583
Max	16.4334

Unit	number
Type	whole
Min	0
Max	51612

Unit	volt
Type	real
Min	0
Max	15.53

Unit	celsius
Type	real
Min	-8.25
Max	42.47

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	7
Definition	Missing data
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	3
Definition	Negative value set to 0
Source

Code Definition

Code	5
Definition	Questionable value due to potential fouling
Source

Code Definition

Code	6
Definition	Very questionable value due to potential fouling. Values adjusted using a linear or square root function to match high-resolution CTD profiles are given in RDO_mgL_5 and RDO_sat_percent_5
Source

Code Definition

Code	7
Definition	Missing data
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	3
Definition	Negative value set to 0
Source

Code Definition

Code	5
Definition	Questionable value due to potential fouling
Source

Code Definition

Code	6
Definition	Very questionable value due to potential fouling. Values adjusted using a linear or square root function to match high-resolution CTD profiles are given in RDO_mgL_9 and RDO_sat_percent_9
Source

Code Definition

Code	7
Definition	Missing data
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	2
Definition	"Outlier value removed and set to NA, see Methods section for more detail on QAQC process"
Source

Code Definition

Code	3
Definition	Negative value set to 0
Source

Code Definition

Code	4
Definition	Value removed due to fouling and set to NA
Source

Code Definition

Code	5
Definition	Questionable value due to potential fouling
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	3
Definition	Negative value set to 0
Source

Code Definition

Code	4
Definition	Value removed due to fouling and set to NA
Source

Code Definition

Code	5
Definition	Questionable value due to potential fouling
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	2
Definition	"Outlier value removed and set to NA, see Methods section for more detail on QAQC process"
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	8
Definition	Values corrected with a constant offset due to thermistor malfunction
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Code Definition

Code	8
Definition	Values corrected with a constant offset due to thermistor malfunction
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No flag
Source

Code Definition

Code	1
Definition	Value removed due to maintenance and set to NA
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

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

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

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

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:

Non-Categorized Data Resource

Name:

temp_oxy_chla_qaqc.R

Entity Type:

unknown

Description:

Automated QAQC script

Physical Structure Description:

Object Name:

temp_oxy_chla_qaqc.R

Size:

13892 bytes

Authentication:

dfbaa6ef7a3b1bfd73ffdac83b04a58f Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/85/7/838ec51722556a4014d4007feffa899b

Non-Categorized Data Resource

Name:

catwalk_EDI_QAQC_all_variables.R

Entity Type:

unknown

Description:

Final script to run QAQC

Physical Structure Description:

Object Name:

catwalk_EDI_QAQC_all_variables.R

Size:

37599 bytes

Authentication:

6fc6da127c63e3bc77472254ccc29dd2 Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/85/7/cfc26e1c6a7a55cb5077054fcccef8aa

Non-Categorized Data Resource

Name:

CAT_MaintenanceLog_2020.txt

Entity Type:

unknown

Description:

Maintenance log for catwalk sensors

Physical Structure Description:

Object Name:

CAT_MaintenanceLog_2020.txt

Size:

8412 bytes

Authentication:

5de0fb32eccfa4a4bc1b1e4e4a272e3d Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/85/7/4d5828be0d8103d41cfccb108cd09c55

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	Carey Lab, Virginia Tech, Western Virginia Water Authority, Falling Creek Reservoir
lter controlled vocabulary	lakes, water quality, water temperature, dissolved oxygen, conductivity, specific conductance, chlorophyll a, pressure, physical properties, fluorescence
cuahsi controlled vocabulary	lake, reservoir, reservoirs, high-frequency sensors

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:

Methods Depth profiles of multiple water quality variables were collected at the deep hole of Falling Creek Reservoir in 2018-2020 using water temperature thermistors, dissolved oxygen sensors, pressure sensors, and a YSI EXO sonde. Profiles were collected every ten minutes from July 2018 to December 2020. We deployed the thermistors and 5 and 9 m dissolved oxygen sensors in July 2018 and the EXO sonde at 1 m depth was deployed in August 2018. The EXO sonde was moved from 1.0 m to 1.6 m depth on 2019-05-20 at 12:40:00 (1.6 m is the depth of one of the outtake valves for drinking water treatment). As the EXO sonde has been moored near the outtake valve at 1.6 m (assuming full pond), the exact depth of the EXO sonde varied slightly over time due to small water level changes in the reservoir. We deployed a pressure transducer at 9 m in May 2020 to help track water level changes.

At the time of deployment in summer 2018, the thermistor string was factory-calibrated and verified against a NIST-traceable thermistor to meet measurement precision. The in situ dissolved oxygen sensors were calibrated using a one point calibration according to the standards and practices outlined in the user manual. The YSI EXO Sonde sensors, except for temperature, were user-calibrated as outlined in the user manual and KOR EXO software.

Maintenance/Issues

Maintenance data gaps:

The sensor string was regularly brought up to the surface for routine maintenance, dates and times of which were recorded in the CAT_MaintenanceLog_2020.txt file. To account for this, we used an automated QAQC script (temp_oxy_qaqc.R) which indexed the dates and times recorded in the maintenance log and set the data to NA and the Flag_All column set to 1. Any data points outside of the immediate timeframe that the sensor string was up that do not reflect ambient conditions due to sensor re-equilibration were also set to NA and Flag_All to 1 manually.

Dissolved Oxygen sondes at 5 and 9 m

On August 7, 2020, the RDO-PRO-X Sensor caps at 5 m and 9 m were replaced. Both dissolved oxygen sensors were calibrated on August 17, 2020 using a one point 100 percent air saturation calibration.

There were two periods in the summer of 2019 and four periods in the summer of 2020 when hypolimnetic DO sondes gave low readings that did not align with simultaneous measurements from a high-resolution CTD profiler (likely due to fouling). We adjusted these values using linear or square root functions to best match the CTD and present those data in a separate column (original values are retained and data are flagged for this column with Flag = 6). The equations for each adjustment are given below, as well as in the R code provided with this data product. 5 meter oxygen sonde 2019-08-11 00:00:00 to 2019-08-12 12:40:00

- DO (mg/L) = DO observed plus the square root of the difference between the current time and 2019-08-11 00:00:00 in minutes, divided by 30 - DO (percent saturation) = DO observed plus the square root of the difference between the current time and 2019-08-11 00:00:00 in minutes, divided by 30/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C 9 meter oxygen sonde 2019-08-05 12:45:00 to 2019-08-12 12:40:00

- DO (mg/L) = DO observed plus the square root of the difference between the current time and 2019-08-05 12:45:00 in minutes, divided by 70 - DO (percent saturation) = DO observed plus the square root of the difference between the current time and 2019-08-05 12:45:00 in minutes, divided by 70/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C

2019-09-02 13:00:00 to 2019-09-27 12:30:00

- DO (mg/L) = DO observed plus the difference between the current time and 2019-09-02 13:00:00 in minutes, divided by 30000 - DO (percent saturation) = DO observed plus the difference between the current time and 2019-09-02 13:00:00 in minutes, divided by 30000/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C

2020-08-11 07:00:00 to 2020-08-17 12:50:00

- DO (mg/L) = DO observed plus the difference between the current time and 2020-08-11 07:00:00 in minutes, divided by 6500 - DO (percent saturation) = DO observed plus the difference between the current time and 2020-08-11 07:00:00 in minutes, divided by 6500/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C

2020-08-19 20:00:00 to 2020-08-24 10:40:00

- DO (mg/L) = DO observed plus the difference between the current time and 2020-08-19 20:00:00 in minutes, divided by 6500 - DO (percent saturation) = DO observed plus the difference between the current time and 2020-08-19 20:00:00 in minutes, divided by 6500/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C

2020-08-26 12:00:00 to 2020-09-02 10:50:00

- DO (mg/L) = DO observed plus the difference between the current time and 2020-08-26 12:00:00 in minutes, divided by 10000 - DO (percent saturation) = DO observed plus the difference between the current time and 2020-08-26 12:00:00 in minutes, divided by 10000/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C

2020-09-05 06:00:00 to 2020-09-09 17:50:00

- DO (mg/L) = DO observed plus the difference between the current time and 2020-09-05 06:00:00 in minutes, divided by 3000 - DO (percent saturation) = DO observed plus the difference between the current time and 2020-09-05 06:00:00 in minutes, divided by 3000/11.3*100, with 11.3/100 being the potential saturation of oxygen in water at 10 degrees C

Water temperature (thermistors):

The temperature string was tangled after some maintenance on October 9th, 2020 and was fixed on October 11, 2020. Consequently, there was a data gap for the temperature sensors at 5, 6, 7, 8 and 9 m from October 9-11, 2020, with a data flag of 1 in the Flag_All column.

On October 19, 2020, the NexSens T-Node FR Thermistor (Serial No. 3718) deployed at 0.1 m stopped working and read NA until October 20, when we took the thermistor from 2 m and put it at 0.1 m. There was a data gap at 2m from October 20-22, 2020. We put the NexSens T-Node Thermistor (Serial No. 3903) from Beaverdam Reservoir, another one of our sites, at 0.1 m in FCR and returned the 2 m thermistor back to its original depth at 2 m on October 22, 2020. Consequently, there was a data gap for 0.1 m temperature from October 19-20, 2020 and a data gap for 2 m temperature from October 20-22, 2020, all flagged with data code 1 .

In late October-December 2020, two of the Nexus T-Node FR Thermistors (at 1 m and 4 m) appeared to be reading water temperatures higher than the sensors deployed above them. On 7 Jan 2021, we put the 2 suspect thermistors and 4 other thermistors adjacently located (0.1, 2, 3, and 9 m) in a water bath in the field for an hour. The water bath showed that thermistors at 1 m and 4m were exhibiting higher readings than the others in the bath. The 1 m thermistor was reading about 0.2496_ higher, and the 4 m thermistor was reading about 0.3862_. To correct for this discrepancy, we created an offset for both the 1 m and 4 m thermistors from November 1, 2020 to December 31, 2020 (the time period in which the thermistors were consistently exhibiting higher temperature readings). First, we took the average temperature of the thermistors directly above and below the suspect ones for each 10-min interval observation during November 1 to December 31, 2020. Second, we calculated the difference between the suspect thermistor's reading and its neighbor average, which we averaged over the entire time period to calculate a mean offset. Third, this mean offset was subtracted from the observed thermistor reading on each observation. For example, for the 1 m thermistor we took the average of the 0.1 m thermistor and the 2m thermistor for the neighbor average at each time interval, then we found the difference between the 1 m thermistor and the neighbor average to calculate the offset value for the entire November 1-December 31 period. The offset value for the 1 m thermistor was 0.22617oC and for the 4m thermistor was 0.18122oC. The offset was subtracted from the 1 m thermistor values from October 29, 2020 13:00EST to the end of 2020 and the offset for the 4m thermistor was subtracted from the raw values on October 31, 2020 05:00EST to the end of 2020. These times were chosen because the broken thermistors were reading consistently higher than than the one above them. The observations that received an offset were flagged with data code 8.

EXO sonde:

On August 7, 2020, the YSI EXO (1.6 m) Optical Dissolved Oxygen Sensor Cap (Serial No. 20E101629) was replaced, and the dissolved oxygen sensor was calibrated on August 17, 2020 using a one point 100 percent air saturation calibration. The EXO 1.6 m dissolved oxygen sensor was recalibrated on 15 September 2020, 19 October 2020, and 27 December 2020 using a one point 100 percent air saturation calibration.

The YSI EXO sonde was removed from the reservoir on December 2, 2020 for manufacturer cleaning, maintenance, and calibration. It was re-deployed in the reservoir on December 27, 2020. Below is the status of each sensor: pass or fail, and the calibration, or maintenance information. All sensors were calibrated by the manufacturer on December 21, 2020 unless otherwise stated.

YSI EXO2 Sonde Serial No. 18D103367, Pass Replaced power-communication circuit board due to issues at final testing, depth sensor passed Wiped Conductivity/Temperature Sensor Serial No. 18C102992, Pass Temperature reads 20.78 _C in a 20.70 _C bath with a cell constant of 0.47 Conductivity reads zero sp cond. in air. Central Wiper for Conductivity/Temperature Sensor Serial No. 18D101236, Pass Replaced head & motor O-rings Dissolved Oxygen Sensor Serial No. 18D101168, Pass Probe ODO Gain: 1.24 Total Algae Sensor Serial No. 18D102222, Pass Chlorophyll-a: Probe reads 14.73 RFU in 16.4 standard-calibrated to standard. Probe reads 58.65 _g/L in 66 standard-calibrated to standard. Phycocyanin: Probe reads 13.36 RFU in 16 standard-calibrated. Probe reads 13.37 _g/L in 16 standard-calibrated to standard fDOM Sensor Serial No. 18C100625, Pass Probe reads 275.69 uncalibrated QSU in 300 QSU standard- calibrated to 300QSU. Probe reads 92.18 uncalibrated RFU in 100 RFU standard- calibrated to 100 RFU

EXO Chlorophyll-a and Phycocyanin The chlorophyll-a and phycocyanin sensor data underwent a QAQC process to remove extreme outliers (see 'chla and phyco qaqc' section of catwalk_EDI_QAQC_all_variables.R script). Outliers were defined as absolute values greater than four standard deviations from previous and subsequent measurements for each individual observation. These outliers were set to NA and identified in the Flag_Chla or Flag_Phyco column as a value of 2.

EXO fDOM fDOM sensor data underwent a QAQC process to remove extreme outliers (see 'fdom qaqc' section of catwalk_EDI_QAQC_all_variables.R script). Outliers were defined as absolute values greater than two standard deviations from previous and subsequent measurements for each individual observation. These outliers were set to NA and identified in the Flag_fDOM column as a value of 2.

Instruments, manual, and serial numbers used in 2018, 2019, and 2020: Multiple sensors and instruments were added over time; below we note serial numbers of sensors with accompanying depths and provide links to the accompanying instrument manuals.

NexSens T-Node FR Thermistors (July 2018 - December 2020) https://www.fondriest.com/pdf/nexsens_t-node_fr_manual.pdf Serial No. 3718; Depth 0.1m (July 2018- October 19, 2020) Serial No. 3741; Depth 0.1m (October 20-22, 2020) Serial No. 3903: Depth 0.1m (October 22, 2020- current) Serial No. 3724; Depth 1m Serial No. 3741; Depth 2m (July 2018-October 20, 2020; October 22, 2020-current) Serial No. 3746; Depth 3m Serial No. 3747; Depth 4m Serial No. 3751; Depth 5m Serial No. 3786; Depth 6m Serial No. 3823; Depth 7m Serial No. 3851; Depth 8m Serial No. 3857; Depth 9m

InSitu RDO Pro-X Dissolved Oxygen Sensor with Anti-Fouling Guard (July 2018 - December 2020) https://in-situ.com/wp-content/uploads/2014/11/RDO_PRO-X_Manual.pdf Serial No. 584491; Depth 5m Calibration from July 5, 2018 to December 19, 2018; slope = 1.0361, offset = 0.00 Calibration from August 17, 2020 to September 15, 2020; slope = 1.1074, offset = 0.00 Calibration from October 19, 2020 to current; slope = 1.1447, offset = 0.00 Serial No. 584488; Depth 9m Calibration from July 5, 2018 to August 20, 2018; slope = 1.0743, offset = 0.00 Calibration from August 20, 2018 to December 19, 2018; slope = 1.0000, offset = 0.00 Calibration from August 17, 2020 to September 15, 2020; slope = 1.1656, offset = 0.00 Calibration from September 15, 2020 to October 19, 2020; slope = 1.0916, offset= 0.00 Calibration from October 19, 2020 to current; slope=1.1221; offset=0.00

Campbell Scientific Stainless-Steel Pressure Transducer CS451 (May 2020-current) Serial No. 29010799 https://s.campbellsci.com/documents/us/manuals/cs451-cs456.pdf

YSI EXO2 Sonde Serial No. 18D103367 (August 2018 - December 2020) Wiped Conductivity/Temperature Sensor Serial No. 18C102992 Central Wiper for Conductivity/Temperature Sensor Serial No. 18D101236 Dissolved Oxygen Sensor Serial No. 18D101168 Total Algae Sensor Serial No. 18D102222 fDOM Sensor Serial No. 18C100625 Pressure Transducer Serial No. 17K100864 https://www.ysi.com/File%20Library/Documents/Manuals/EXO-User-Manual-Web.pdf YSI EXO Optical Dissolved Oxygen Sensor Cap Serial No. 18C105373 (August 2018- August 7, 2020) YSI EXO Optical Dissolved Oxygen Sensor Cap Serial No. 20E101629 (August 7, 2020-December 2020) Calibration from August 17, 2020 to September 15, 2020; DO Gain=1.13 Calibration from September 15, 2020 to October 19, 2020; DO Gain=1.11 Calibration from October 19, 2020 to December 2, 2020; DO Gain=1.12 Calibration fromDecember 27, 2020 to December 31, 2020; DO Gain=1.10

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@environmentaldatainitiative.org

Web Address:

https://environmentaldatainitiative.org

Creators:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

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

Individual:

Whitney M . Woelmer

Organization:

Virginia Tech

Email Address:

wwoelmer@vt.edu

Id:

https://orcid.org/0000-0001-5147-3877

Individual:

Abigail S. L. Lewis

Organization:

Virginia Tech

Email Address:

aslewis@vt.edu

Id:

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

Individual:

Adrienne Breef-Pilz

Organization:

Virginia Tech

Email Address:

abreefpilz@vt.edu

Id:

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

Individual:

Dexter W. Howard

Organization:

Virginia Tech

Email Address:

dwh1998@vt.edu

Id:

https://orcid.org/0000-0002-6118-2149

Individual:

Bethany J. Bookout

Organization:

Virginia Tech

Email Address:

bethanyb18@vt.edu

Id:

https://orcid.org/0000-0001-8394-926X

Contacts:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

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

Associated Parties:

Individual:	Wentao Guo
Role:	Contributor

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2018-07-05

End:

2020-12-31

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:

SCC-IRG Track 2: Resilient Water Systems: Integrating Environmental Sensor Networks and Real-Time Forecasting to Adaptively Manage Drinking Water Quality and Build Social Trust

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 1737424

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

Personnel:

Individual:

Renato J. Figueiredo

Organization:

University of Florida

Email Address:

renato@acis.ufl.edu

Id:

https://orcid.org/0000-0001-9841-6060

Role:

Principal Investigator

Funding:

National Science Foundation 1933102

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Additional Info


Additional Information:
	In 2018-2020, hypolimnetic oxygenation water quality management occurred in Falling Creek Reservoir. For a detailed description of the hypolimnetic oxygenation engineered system, see Gerling et al. (2014). This system was operated intermittently from April to November 2018 and again in 2019 and 2020. Gerling, A.B., Browne, R.G., Gantzer, P.A., Mobley, M.H., Little, J.C., and C.C. Carey. 2014. First report of the successful operation of a side stream supersaturation hypolimnetic oxygenation system in a eutrophic, shallow reservoir. Water Research. 67: 129-143. doi: 10.1016/j.watres.2014.09.002

Other Metadata

Additional Metadata

additionalMetadata
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        |___element 'metadata'
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        |     |     |___text '\n        '
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        |     |     |     |  \___attribute 'id' = 'microSiemensPerCentimeter'
        |     |     |     |  \___attribute 'multiplierToSI' = '1.00E-04'
        |     |     |     |  \___attribute 'name' = 'microSiemensPerCentimeter'
        |     |     |     |  \___attribute 'parentSI' = 'siemenPerMeter'
        |     |     |     |  \___attribute 'unitType' = 'conductance'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'microSiemenPerCentimeter'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'RelativeFluorescenceUnits'
        |     |     |     |  \___attribute 'multiplierToSI' = ''
        |     |     |     |  \___attribute 'name' = 'RelativeFluorescenceUnits'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'measurement of the relative amount of fluorescence excitation detected in response to particular wavelength of light'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'QuinineSulfateUnits'
        |     |     |     |  \___attribute 'multiplierToSI' = ''
        |     |     |     |  \___attribute 'name' = 'QuinineSulfateUnits'
        |     |     |     |  \___attribute 'parentSI' = ''
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'measurement of the relative amount of fluorescence excitation detected in response to fluorescent dissolved organic matter'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'psig'
        |     |     |     |  \___attribute 'multiplierToSI' = '17.85'
        |     |     |     |  \___attribute 'name' = 'psig'
        |     |     |     |  \___attribute 'parentSI' = 'kilogramsPerSquareMeter'
        |     |     |     |  \___attribute 'unitType' = 'arealMassDensity'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'pounds per square inch guage'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

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