Chesapeake Bay Maryland (CBM) NERR Water Quality Metadata April 2001-November 2001 Latest Update: April 11, 2003
Entry ID:
CDMO_cbmwq04-11.01m
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Summary
Abstract:
Water quality monitoring is conducted at 26 National Estuarine Research Reserves (NERR)
at four locations within or adjacent to the reserve. The following parameters are collected at
least every 30 minutes: water temperature, specific conductivity, salinity, percent saturation,
dissolved oxygen concentration, water depth, pH and turbidity. All water quality data loggers
will be deployed from a known depth from the bottom at each site.
Purpose:
The purpose of the monitoring program at CBM NERR is to conform to the NERR SWMP monitoring program looking at trends in water quality over both temporal and spatial scales. A difference in how marshes can change water quality is being studied by comparing a marsh creek site to a river channel site. Measurements are taken every 30 minutes over a 5-14 ... day period at both the
Patuxent River Park (PR) and Jug Bay Wetlands Sanctuary (JB) sites.
SUPPLEMENTAL INFORMATION:
Associated researchers and projects The Jug Bay Wetlands Sanctuary staff have been collecting
weekly to monthly temperature, salinity, dissolved oxygen, and nutrient samples at the same
location as the data logger at JB. Other remarks/notes
CURRENTNESS REFERENCE:
Observed
SPATIAL DATA ORGANIZATION INFORMATION:
Indirect Spatial Reference: Site location and character The Chesapeake Bay Maryland NERR
has three components in Maryland's portion of Chesapeake Bay. Monie
Bay is a mesohaline region on the lower Eastern Shore; Otter Point Creek is a tidal freshwater
river and marsh system; and Jug Bay is part of the freshwater portion of the Patuxent River.
Both data loggers are within the Jug Bay component. Patuxent River Park (PR) ; (38 deg
46' 23.5"N/76 deg 42' 32.5"W) Site PR is located in the upper tidal headwaters of the Patuxent
River, Maryland. PR is along the mainstem of the Patuxent River, which is approximately 50m wide
at this point along the river. The PR site sits adjacent to a boat launch at Jackson Landing,
located on the Prince Georges County side of the river at Patuxent River Park. The actual sonde
is deployed horizontally in a retro-fitted crab pot and sits roughly .25m off the bottom
sediments. Sediments at the site are extremely fine and easily resuspended. Average depth at
this site is roughly 2 meters. Salinities at this site rarely exceed 1ppt. Because this site is
located along the main channel of the Patuxent River, water quality at this site represents the
general quality of water flowing along the main portion of the river. The Patuxent River
watershed is an increasingly urbanized watershed, however there are extensive riparian buffers
along the portion of the river that flows through the site. However, the PR site is
approximately 3km downstream of a large wastewater treatment plant that discharges directly into
the Western Branch tributary of the Patuxent River. The PR site is roughly 1.5km downstream of
the confluence of the Western Branch tributary and the Patuxent River mainstem. The tidal range
at this site is roughly 0.5m. Jug Bay (JB) ; (38 deg 46' 5"N/76 deg 42' 28"W
estimated) Site JB is located in a shallow tidal creek adjacent to the Patuxent River. The site
is slightly upstream (roughly 0.3km) from the PR site but sits in shallow creek that is tidally
infiltrated by a backwater marsh adjacent to the Patuxent River mainstem. At low tide, this
backwater marsh becomes a large mud flat with very little standing water. The creek ranges in
width between 2m to 5m at the site and average depth at the site is 0.75m. Because of the
shallow nature of this site, the sonde is periodically exposed at very low tides. Sediments at
this site are extremely fine and flocculant. The sonde is deployed horizontally in a retro-
fitted cage, similar to site PR. Because of the shallowness of the tidal creek, coupled with the
dramatic daily changes in the depth and width of the stream, deployments at this site have
presented some problems. These problems include periodic exposure of the sonde, very high
turbidity and sedimentation rates associated with tidal infiltration and resuspension, which
have caused severe fouling of the probes at this site. Water quality at the site represents
extreme shallow water habitats. Thus it is not uncommon to see very large fluctuations in
temperature and dissolved oxygen at this site ranging from complete anoxia to full saturation,
due in part to the shallow nature of the site and the effects of marsh processes on water
quality. Salinities at this site rarely exceed 1 ppt. Tidal range at this site is roughly 0.5m. 
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 39.45
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S: 38.19
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E: -75.79
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W: -76.71
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Data Set Citation
Dataset Originator/Creator:
Pamela M. Behm, Marta Ceroni, Julie Bortz
Dataset Title:
Chesapeake Bay Maryland (CBM) NERR Water Quality Metadata April 2001-November
2001 Latest Update: April 11, 2003
Dataset Release Date:
2006-02-08
Data Presentation Form:
Unknown
Other Citation Details:
NA
Online Resource:
http://cdmo.baruch.sc.edu/
Parent DIF
This data set description is a member of a collection. The
collection is described in
noaanosnerr_d_nerrparent
Temporal Coverage
Start Date:
2001-04-01
Stop Date:
2001-11-30
Quality
ATTRIBUTE ACCURACY REPORT: Anomalous/Suspect Data Note: Turbidity data is incomplete and
suspect for both PR and JB. A new YSI 6600 data logger, complete with turbidity probe, was put
in rotation on 8/02/01. This was the only turbidity probe in rotation between JB and PR. There
was no turbidity probe installed at either site prior ... to this date. However, calibration
procedures for this probe were unclear and technicians were not trained on the proper usage of
this probe (i.e. a clear beaker was used for calibration). As such, all turbidity data is
suspect. All obvious turbidity outliers were removed, as reported below in section 12. JB:
January No data collected entire month. February No data collected entire month. March No data
collected entire month. April Data collection began 4/27/01 at 19:00. May No data 5/2/01
18:00-18:30 as sonde failed to take reading. No data 5/3/01 16:30-18:00 as sonde failed to take
reading. No data 5/3/01 19:00 as sonde failed to take reading. No data 5/4/01 18:30-19:00 as
sonde failed to take reading. No data 5/5/01 16:00-16:30 as sonde failed to take reading. No
data 5/9/01 11:30 due to calibration and maintenance. June No data 6/10/2001 16:00 - 6/15/01
12:30 because sonde reached internal memory capacity. No data 6/28/2001 23:30 - 6/29/01 0:00 as
sonde failed to take reading. No data 6/29/01 13:30-14:00 as sonde failed to take reading. No
data 6/29/01 19:30 as sonde failed to take reading. No data 6/30/01 3:00 as sonde failed to take
reading. No data 6/30/01 11:30-13:00 as sonde failed to take reading. No data 6/30/01
15:00-18:30 as sonde failed to take reading. No DO data 6/28/01 14:00 - 6/30/01 23:30 due to DO
probe malfunction July No DO data 7/1/01 0:00 - 7/11/01 14:00 due to DO probe malfunction No
data 7/1/01 13:00-16:30 as sonde failed to take reading. No data 7/1/01 17:30-19:00 as sonde
failed to take reading. No data 7/4/01 17:30-19:30 as sonde failed to take reading. No data
7/5/01 15:30-19:30 as sonde failed to take reading. No data 7/6/01 18:00 as sonde failed to take
reading. No data 7/7/01 17:00 as sonde failed to take reading. No data 7/7/01 18:00-18:30 as
sonde failed to take reading. No data 7/9/01 22:00-23:00 as sonde failed to take reading. No
data 7/23/01 17:00-22:00 as sonde failed to take reading. No data 7/23/01 23:00 - 7/24/01 0:30
as sonde failed to take reading. No data 7/24/01 18:00 - 7/25/01 0:00 as sonde failed to take
reading. No data 7/25/01 1:30-2:30 as sonde failed to take reading. No data 7/25/01 17:30-23:30
as sonde failed to take reading. No data 7/26/01 1:00-1:30 as sonde failed to take reading.
August No data 8/2/01 15:30-16:30 due to calibration and maintenance. Turbidity outlier data
removed: Date Time Turbidity (NTU) 08/07/2001 12:30 1141 08/07/2001 14:30 1135 08/07/2001 23:00
1391 08/07/2001 23:30 1464 08/08/2001 0:30 1091 08/08/2001 1:00 1194 08/08/2001 1:30 1451
08/08/2001 8:30 1458 08/08/2001 16:30 1470 08/08/2001 18:30 1471 08/08/2001 20:30 1481
08/08/2001 23:00 1467 08/09/2001 0:30 1400 08/09/2001 1:00 1181 08/09/2001 1:30 1460 08/09/2001
2:00 1339 08/09/2001 2:30 1136 08/09/2001 3:00 1084 08/09/2001 20:30 1217 08/10/2001 6:30 1345
08/10/2001 19:00 1465 08/11/2001 14:00 1466 08/11/2001 14:30 1466 08/11/2001 15:00 1469
08/11/2001 15:30 1470 08/11/2001 16:00 1471 08/11/2001 16:30 1470 08/11/2001 17:00 1469
08/11/2001 17:30 1468 08/11/2001 18:00 1465 08/11/2001 18:30 1465 08/11/2001 19:00 1460
08/11/2001 19:30 1455 08/11/2001 20:00 1453 08/11/2001 20:30 1453 08/11/2001 21:00 1455
08/11/2001 21:30 1457 08/11/2001 23:00 1118 08/12/2001 13:30 1189 08/12/2001 19:00 1444
08/12/2001 19:30 1443 08/12/2001 23:00 1450 08/13/2001 3:30 1250 08/13/2001 4:00 1439 08/13/2001
4:30 1438 08/13/2001 5:00 1437 08/13/2001 5:30 1437 08/13/2001 6:00 1437 08/13/2001 6:30 1437
08/13/2001 7:00 1429 08/13/2001 7:30 1407 08/13/2001 8:00 1437 08/13/2001 8:30 1438 08/13/2001
9:00 1440 08/13/2001 9:30 1443 08/13/2001 10:00 1444 08/13/2001 10:30 1444 08/13/2001 11:00 1445
08/13/2001 11:30 1446 08/13/2001 12:00 1446 08/13/2001 12:30 1446 08/13/2001 13:00 1446
08/13/2001 13:30 1446 08/13/2001 14:00 1445 08/13/2001 14:30 1446 08/13/2001 15:00 1447
08/13/2001 21:00 1445 08/13/2001 21:30 1439 08/13/2001 22:00 1443 08/13/2001 22:30 1389
08/13/2001 23:30 1444 08/14/2001 0:00 1445 08/14/2001 0:30 1445 08/14/2001 1:00 1445 08/14/2001
1:30 1442 08/14/2001 2:00 1440 08/14/2001 2:30 1438 08/14/2001 3:00 1437 08/14/2001 3:30 1437
08/14/2001 4:00 1435 08/14/2001 4:30 1434 08/14/2001 5:00 1432 08/14/2001 5:30 1431 08/14/2001
6:00 1431 08/14/2001 6:30 1431 08/14/2001 7:00 1431 08/14/2001 7:30 1431 08/14/2001 8:00 1431
08/14/2001 8:30 1431 08/14/2001 9:00 1431 08/14/2001 9:30 1433 08/14/2001 10:00 1436 08/14/2001
10:30 1443 08/14/2001 11:00 1447 08/14/2001 11:30 1449 08/28/2001 3:30 1497 No turbidity probe
available 08/14/01 12:00 through 08/24/01 12:30. DO data suspect 08/11/01 01:00 through 08/14/01
11:30 due to possible fouling of probe. pH data for deployment 08/14/01 12:00 through 08/24/01
13:00 suspect due to possible calibration error. September No data 9/6/01 14:00 due to
calibration and maintenance. No data 9/19/01 15:30 due to calibration and maintenance. Turbidity
outlier data removed: Date Time Turbidity (NTU) 09/04/2001 2:30 1074 09/04/2001 6:00 1359
09/04/2001 7:30 1158 09/04/2001 8:00 1318 09/04/2001 17:30 1507 09/04/2001 18:00 1506 09/04/2001
21:00 1503 09/04/2001 22:30 1502 09/04/2001 23:00 1500 09/05/2001 0:00 1497 09/05/2001 1:00 1493
09/05/2001 8:30 1040 09/05/2001 9:00 1175 09/05/2001 9:30 1345 09/05/2001 10:00 1480 09/05/2001
10:30 1421 09/05/2001 11:00 1484 09/05/2001 11:30 1485 09/05/2001 12:00 1487 09/05/2001 12:30
1490 09/05/2001 19:00 1509 09/05/2001 19:30 1507 09/05/2001 20:00 1507 DO mg/L and DO % deleted
09/05/01 22:30 ; 09/06/01 13:30 due to possible exposure prior to redeployment of
sonde. pH data for deployment 09/19/01 16:00 ; 10/03/01 14:30 was deleted due to
deployment of bad pH probe. October pH data for deployment 09/19/01 16:00 ; 10/03/01
14:30 was deleted due to deployment of bad pH probe. November No missing data. December No data
collected entire month. PR: January No data collected entire month. February No data collected
entire month. March No data collected entire month. April Data collection began 4/27/01 at 7:00.
May All data deleted 05/09 14:00 through 05/10 05:00 due to exposure of sonde at low tide. June
No data 6/4/01 12:30 due to calibration and maintenance. No data 6/14/01 15:00-21:30 as sonde
failed to take reading. No data 6/14/01 22:30-23:30 as sonde failed to take reading. No data
6/28/01 13:00-13:30 due to calibration and maintenance. July No data 7/23/01 11:30-15:00 as
sonde failed to take reading. August No data 8/2/01 0:00-0:30 as sonde failed to take reading.
No data 8/2/01 1:30-2:00 as sonde failed to take reading. No data 8/2/01 4:30-15:30 as sonde
failed to take reading. No data 8/14/01 13:30 - 8/24/01 14:00 due to sonde malfunction (internal
failure). September No data 9/19/01 13:30 due to calibration and maintenance. Turbidity outlier
data removed: Date Time Turbidity (NTU) 09/20/01 1:00 1414 09/20/01 11:30 1414 09/21/01 4:00
1412 09/21/01 12:00 1415 09/22/01 15:00 1418 09/22/01 20:30 1275 09/23/01 12:00 1422 09/23/01
20:00 1427 09/23/01 21:30 1427 09/24/01 18:00 1425 09/25/01 19:00 1123 09/25/01 20:30 1414
09/25/01 21:30 1337 09/26/01 2:00 1415 09/26/01 7:00 1042 09/26/01 11:30 1403 09/26/01 16:00
1404 09/26/01 16:30 1284 09/26/01 17:00 1405 09/26/01 23:30 1405 09/27/01 1:00 1405 09/27/01
1:30 1406 09/27/01 2:00 1086 09/27/01 2:30 1406 09/27/01 6:00 1365 09/27/01 7:00 1400 09/27/01
7:30 1400 09/27/01 8:00 1399 09/27/01 8:30 1398 09/27/01 9:00 1398 09/27/01 15:00 1404 09/27/01
17:00 1404 09/27/01 23:30 1092 09/28/01 11:30 1398 09/28/01 12:00 1399 09/28/01 12:30 1397
09/28/01 13:30 1366 09/28/01 17:00 1398 09/28/01 18:00 1399 09/30/01 7:30 1392 October No data
10/3/01 14:30-16:00 due to calibration and maintenance. Turbidity outlier data removed: Date
Time Turbidity (NTU) 10/01/01 2:00 1388 10/01/01 2:30 1388 10/02/01 3:00 1388 10/03/01 8:00 1395
10/22/01 18:30 1457 10/23/01 6:00 1452 10/29/01 19:00 1430 10/29/01 19:30 1292 10/29/01 20:30
1150 10/29/01 21:00 1229 10/29/01 21:30 1277 10/29/01 22:00 1405 10/29/01 22:30 1422 10/29/01
23:00 1372 10/29/01 23:30 1417 November No data 11/15/01 12:30-13:00 due to calibration and
maintenance. Turbidity outlier data removed: Date Time Turbidity (NTU) 11/30/01 20:30 1391
December No data collected entire month. Post deployment information Calibration was not
performed during post deployment because this procedure was not included in training of research
technicians. Therefore, technicians were not aware of or trained for post deployment
calibration. LOGICAL CONSISTENCY REPORT: NACOMPLETENESS REPORT: Data collection period Data
loggers initiated collection in April 2001 and continued through the end of November 2001, at
Jug Bay Wetlands Sanctuary (JB) and Patuxent River Park (PR). Sondes were deployed from April
through November 2001 due to concerns with ice cover that prohibited deployment during the
winter months. The time of deployment and retrieval was not documented in the field, therefore
only dates are given for those instances when the time was unknown. Data logger deployments: Jug
Bay 2001: Deployment Retrieval 04/27 19:00 05/09 11:00 05/09 12:00 05/21 05/21 06/04 06/04 06/15
06/15 06/28 06/28 07/10 07/10 07/23 07/23 08/02 15:00 08/02 17:00 08/14 08/14 08/24 08/24 09/06
13:30 09/06 14:30 09/19 15:00 09/19 16:00 10/03 10/03 10/19 10/19 10/31 10/31 11/15 11/15 12/01
Patuxent River 2001: Deployment Retrieval 04/27 07:00 05/09 05/09 05/21 05/21 06/04 12:00 06/04
13:00 06/14 06/14 06/28 12:30 06/28 14:00 07/11 07/11 07/23 07/23 08/02 08/02 08/14 08/14 08/24
08/24 09/05 09/05 09/19 13:00 09/19 14:00 10/03 14:00 10/03 16:30 10/19 10/19 10/31 10/31 11/15
12:00 11/15 13:30 12/01 Deleted Data Missing Data Missing data are denoted by a period in the
data set. Data are missing due to equipment failure where no probes deployed,
maintenance/calibration of equipment, elimination of obvious outliers, or elimination of data
due to calibration (both pre and post) problems. Outliers were removed throughout the 2001 time
period and are believed to be the result of internal data logger error. For more details on
deleted data, see the Anomalous Data Section (11.). To find out more details about missing data,
contact the Research Coordinator at the site submitting the data. LINEAGE/PROCESS STEP: PROCESS
DESCRIPTION: Additional Description: Entry verification The data are uploaded to a PC from the
YSI 6000/6600 UPG data logger and graphs are produced and quickly examined using the PC6000
software. Data files are then exported from the PC6000 format into Excel (for Windows 98) files
where the headers, footers, and inappropriate spaces are removed. Plots of the data are made and
suspect data (outliers) are dealt with accordingly. Removed data points and missing data are
replaced with a periods (.). Edited files are merged to contain one full month for each data
logger. Data is then QA/QC'd using the cdmomac(ro)3.xls macros and Appendix B., YSI 6000 Data
Review and Editing Protocol. The CDMO cdmomac3.xls macro will allow the user to automatically
format column widths to the correct number of decimal places based on YSI sensor specifications.
It also allows the user to QA/QC each data logger generated file for missing data points, fill
all cells that do not contain data with periods, and find all data points that fall outside the
range of what the data logger is designed to measure (outliers). The CDMO import.xls macro will
allow PC users with 30-minute data to automatically create a monthly Excel file from a two-week
deployment and insert periods for missing data. In addition, in November 1999 a graphing
capability was added to this macro allowing users to produce single parameter and missing data
point graphs on a monthly basis. Marta Ceroni and Pamela Behm were both responsible for the
collection and QA/QC procedures for this data. PROCESS DATE: 20060208
Access Constraints
Data collected in conjunction with the National Estuarine Research Reserve
System's (NERRS) System-wide Monitoring Program (SWMP) is considered public information. Please
see site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm
LIABILITY: Distribution The Centralized Data Management Office re-processed all SWMP ... water data
collected from 1995-2002 to include an identifying station code (three letter reserve code, two
letter sampling site code and data type code), a four digit year date stamp (mm/dd/yyyy) and a
corrected time column (hh:mm). With the new format, the use of periods to denote deleted or
missing data has been abandoned. Hence, all periods contained in the SWMP water data collected
prior 2003 were removed and left blank. According to the Ocean and Coastal Resource Management
Data Dissemination Policy for the NERRS System-wide Monitoring Program, NOAA/ERD retains the
right to analyze, synthesize and publish summaries of the NERRS System-wide Monitoring Program
data. The PI retains the right to be fully credited for having collected and processed the data.
Following academic courtesy standards, the PI and NERR site where the data were collected will
be contacted and fully acknowledged in any subsequent publications in which any part of the data
are used. Manuscripts resulting from the NOAA/OCRM supported research that are produced for
publication in open literature, including refereed scientific journals, will acknowledge that
the research was conducted under an award from the Estuarine Reserves Division, Office of Ocean
and Coastal Resource Management, National Ocean Service, National Oceanic and Atmospheric
Administration. The data set enclosed within this package/transmission is only as good as the
quality assurance and quality control procedures outlined by the enclosed metadata reporting
statement. The user bears all responsibility for its subsequent use/misuse in any further
analyses or comparisons. The Federal government does not assume liability to the Recipient or
third persons, nor will the Federal government reimburse or indemnify the Recipient for its
liability due to any losses resulting in any way from the use of this data. NERR water quality
data and metadata can be obtained from the Research Coordinator at the individual NERR site
(please see section 1. Principal investigators and contact persons), from the Data Manager at
the Centralized Data Management Office (please see personnel directory under general information
link on CDMO homepage) and online at the CDMO homepage http://cdmo.baruch.sc.edu. Data are
available in text tab- delimited format, Microsoft Excel spreadsheet format and comma-delimited
format.
Use Constraints
The principal investigator (PI) listed in the enclosed metadata retains the right
to be fully credited for having collected and processed the data. Please see the site for
further information: http://cdmo.baruch.sc.edu/aboutdata.htm
Data Set Progress
COMPLETE
Distribution
Distribution Format:
Ascii File, Formatted For Text Attributes, Declared Format (ASCII)NA
Fees:
Data is available at no charge.
Personnel
Role:
TECHNICAL CONTACT
Role:
DIF AUTHOR
Contact Address:
Department of Natural Resources
City:
Annapolis
Province or State:
MD
Postal Code:
21401
Country:
USA
Creation and Review Dates
DIF Creation Date:
2006-02-08
Last DIF Revision Date:
2009-06-02
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