Chesapeake Bay Virginia (CBV) NERR Water Quality Metadata September-December 1995 Latest update: November 1, 2002
Entry ID:
CDMO_cbvwq09-12.95m
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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:
Research objectives. The Taskinas Creek watershed is representative of an inner coastal plain rural watershed within the southern Chesapeake Bay system. This watershed is dominated by forested and agricultural land uses with an increasing urban land use component. The drainage basin is suited for investigating hydrologic and nonpoint source water ... quality issues associated with changing land
use patterns; these issues are of prime importance to the U.S. EPA Chesapeake Bay Program.
Continuously monitored physical water quality parameters (dissolved oxygen, pH, specific
conductance, turbidity, and temperature) provide long-term measurements which can be
supplemented with shorter-term monitoring and process oriented studies. Measurements were taken
every 15 minutes at the Taskinas Creek site and the YSI data loggers were maintained,
downloaded, cleaned, and calibrated at two-week intervals.
SUPPLEMENTAL INFORMATION:
Associated researchers and projects A volunteer water quality-monitoring program sponsored by the Alliance
for the Chesapeake Bay has been ongoing at Taskinas Creek for several years since its inception
January 10, 1990. This project samples some overlapping parameters including dissolved oxygen
and salinity on a two-week basis. Other remarks/notes In 1995, several files were recorded in
Daylight Savings Time instead of Eastern Standard Time (EST). Tammy Dorman corrected the
following files so that they would be in accordance with the NERR System Wide Monitoring Program
by displaying the date and time in EST. TC950912.csv was corrected to EST TC951021.csv was
corrected to EST TC951103.csv was corrected to EST Any regions of data with negative depth
values due to low tides or low-pressure systems should be viewed with caution. In some instances
the probes are clearly out of water and have been noted. Depth data should be considered
relative depth. The instrument was deployed on a rope that was tied to a tree branch and
therefore may have been deployed at a slightly different depth for each deployment. This
situation was corrected in the fall of 1996 with the use of steel cable and mounting hardware
that keeps the instrument at a fixed elevation above the creek bottom, however is influenced by
the current causing the instrument to sway as the tides change. Taskinas Creek experiences
extremely low tides where it is difficult to determine times when the probes are out of the
water and when they are not. If the YSI would have been more securely deployed and at a fixed
depth from the bottom, the problem of exposure from low tides might have been lessened. Also
there is an ongoing problem with land subsidence in Taskinas Creek, which at times affects our
deployment because the tree from which our unit is attached, sinks with the land. Current
efforts are being made to construct a more stable and elevation referenced station.
CURRENTNESS REFERENCE:
Observed
SPATIAL DATA ORGANIZATION INFORMATION:
Indirect Spatial Reference: Site location and character Taskinas Creek (TC) Component: (Latitude 37 deg 24
54.04617 N, Longitude 76 deg 4551.75733 W). The Taskinas Creek
Component of the CBNERRVA is on the south shore of the York River in James City County near
Williamsburg. The site is approximately 44 kilometers upstream from the river's mouth and 15
kilometers downstream from West Point. Headwaters of Taskinas Creek are near the town of
Croaker, which is located approximately 10 kilometers north of Williamsburg. The creek flows in
a northeasterly direction covering a distance of about 5.5 kilometers eventually feeding into
the York River. The sampling station is located on the second bend from the mouth of Taskinas
Creek within York River State Park, about 6 meters upstream from the parks canoe landing. The
sediment type at this station consists of 42% fine sand, 30% clay, and 28% silt. The creek is
tidal for approximately half of its length with a tidal range of 0.00- 1.3m. The non-tidal
portion contains feeder streams, which drain oak-hickory forests, maple-gum-oak-ash swamps and
freshwater marshes. The marshes near the creek mouth are brackish with a salinity range from
3-13 ppt. The shoreline is moderately low with fringing marsh and tidal flats. Taskinas Creek
mainly drains the undeveloped York River State Park watershed, however the watershed is lightly
impacted above the State Park by residential development and selective hardwood logging.
Wildlife populations have been shown to influence microbiological water quality within the
watershed. 
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 37.58
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S: 37.21
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E: -76.37
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W: -76.91
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Data Set Citation
Dataset Originator/Creator:
Dr. Maurice Lynch, Dr. William Reay, Tammy Dorman, Bill Seufzer,
Dataset Title:
Chesapeake Bay Virginia (CBV) NERR Water Quality Metadata September-December 1995 Latest update: November 1, 2002
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:
1995-09-01
Stop Date:
1995-12-31
Quality
ATTRIBUTE ACCURACY REPORT: Anomalous/Suspect Data Infrequent data anomalies were recorded
in depth levels for several months potentially due to low-pressure weather fronts. This data
remained in the database. According to the CDMO Operations manual version 3.0, depth
measurements taken with a non-vented level probe can be influenced ... by as much as 0.39m (1.3
feet) during a severe low-pressure hurricane event. Specific dates and time ranges of
potentially influenced data are listed with each respective month. September 1995: TC: 9/13/95
06:00:00 to 08:00:00 Negative depth values due to low tides or low-pressure system 9/13/95
18:15:00 to 20:45:00 Negative depth values due to low tides or low-pressure system 9/14/95
05:45:00 to 07:00:00 Negative depth values due to low tides or low-pressure system 9/14/95
07:15:00 to 08:00:00 All sensors were out of water due to low tide 9/14/95 08:15:00 to 09:45:00
Negative depth values due to low tides or low-pressure 9/14/95 18:30:00 to 22:00:00 Negative
depth values due to low tides or low-pressure system 9/14/95 23:00:00 to 9/27/95 09:00:00 DO
data (%Sat and mg/l) have been deleted. It appears that during a low tide the sensors were out
of the water. It is possible that the DO membrane dried out causing readings after this event to
drift towards zero. 9/22/95 14:00:00 to 15:15:00 Negative depth values due to low tides or
low-pressure system. October 1995: TC: 10/21/95 09:45:00 to 10/31/95 23:45:00 Suspect DO probe
is bad; low pre- DO% and high post- DO% usually indicates a problem with the membrane integrity
or the probe itself. 10/21/95 09:45:00 to 10/31/95 23:45:00 pH readings drifted possibly due to
a bad probe. The graph of the data indicates a probe malfunction. 10/24/95 04:00:00 to 04:30:00
Negative depth values due to low tides or low-pressure system 10/30/95 08:45:00 to 09:30:00,
10/30/95 21:30:00, and 10/31/95 09:45:00 to 11:15:00 Three low salinity records occurred due to
freshwater movement downstream on very low tides, or the probes were out of the water. If the
probes were out of the water and atmospheric pressure was great enough, the depth data could
still show a slightly positive number. Close examination of the data shows a sharp drop of
salinity and conductivity with a later sharp increase. This adds weight to the argument of
probes being out of the water. Data from these events have been left intact, but should be
treated as suspect. 10/30/95 21:45:00 to 10/30/95 23:15:00 All sensors were out of the water due
to a low tide November 1995: TC: 11/01/95 00:00:00 to 11/03/95 16:30:00 Suspect DO probe is bad
- low pre- DO% and high post- DO% usually indicates a problem with the membrane integrity or the
probe itself. 11/01/95 00:00:00 to 11/03/95 16:30:00 pH readings drifted possibly due to a bad
probe. The graph of the data clearly indicates that there was something wrong with this probe.
11/05/95 03:00:00 to 03:45:00 Low DO spikes occurred during low tide conditions 11/07/95
16:00:00 to 17:45:00 Negative depths due to low tides or low-pressure systems 11/07/95 17:00:00
to 20:45:00 Low DO spikes occurred during low tide conditions 11/09/95 18:30:00 to 20:00:00 Low
DO spikes occurred during low tide conditions 11/12/95 07:00:00 to 11:30:00 Low DO spikes
occurred during low tide conditions 11/17/95 14:30:00 to 11/30/95 23:45:00 Depth data removed;
it appears that the depth port may have been plugged resulting in many periods of negative data
and peak depths much lower than normal. December 1995: TC: 12/01/95 00:00:00 to 10:30:00 It
appears that the depth port may have been plugged resulting in many periods of negative data and
peak depths much lower than normal. 12/01/95 23:00:00 to 23:30:00 Negative depths due to low
tides or low-pressure 12/02/95 01:45:00 to 02:00:00 Negative depths due to low tides or
low-pressure 12/01/95 23:45:00 to 12/02/95 01:30:00 All sensors were out of water due to low
tide 12/02/95 23:45:00 to 12/03/95 03:00:00 All sensors were out of water due to low tide
12/03/95 13:15:00 to 15:30:00 All sensors were out of water due to low tide 12/04/95 01:30:00 to
03:00:00 All sensors were out of water due to low tide 12/10/95 18:00:00 to 20:45:00 All sensors
were out of water due to low tide 12/11/95 04:45:00 to 09:30:00 All sensors were out of water
due to low tide 12/11/95 16:45:00 to 22:30:00 All sensors were out of water due to low tide
12/12/95 05:00:00 to 09:30:00 All sensors were out of water due to low tide 12/12/95 18:15:00 to
21:45:00 All sensors were out of water due to low tide 12/21/95 15:15:00 to 17:00:00 All sensors
were out of water due to low tide 12/22/95 03:00:00 to 06:00:00 All sensors were out of water
due to low tide 12/22/95 15:00:00 to 19:00:00 All sensors were out of water due to low tide
12/23/95 02:45:00 to 07:00:00 All sensors were out of water due to low tide 12/23/95 16:45:00 to
19:00:00 All sensors were out of water due to low tide 12/24/95 05:15:00 to 06:45:00 All sensors
were out of water due to low tide 12/27/95 07:30:00 to 10:00:00 All sensors were out of water
due to low tide 12/27/95 19:15:00 to 22:45:00 All sensors were out of water due to low tide
Note: The original *.dat and *.csv files were not found for data collected between 12/15/95
17:15:00 to 12/31/95 23:45:00. The data presented here is from a *.xls file that was found in
the archives. Missing or anomalous data may be the result of the old the old formatting
standard. 12/15/95 17:15:00 to 18:45:00 Negative depth values due to low tides or low-pressure
system 12/19/95 00:00:00 to 02:30:00 Negative depth values due to low tides or low-pressure
system 12/19/95 13:00:00 to 15:45:00 Negative depth values due to low tides or low-pressure
system 12/20/95 01:45:00 to 03:15:00 Negative depth values due to low tides or low-pressure
system 12/20/95 13:45:00 to 16:45:00 Negative depth values due to low tides or low-pressure
system 12/21/95 01:45:00 to 04:45:00 Negative depth values due to low tides or low-pressure
system 12/21/95 14:15:00 to 15:00:00 Negative depth values due to low tides or low-pressure
system 12/21/95 17:15:00 to 18:00:00 Negative depth values due to low tides or low-pressure
system 12/22/95 01:30:00 to 02:45:00 Negative depth values due to low tides or low-pressure
system 12/22/95 06:15:00 to 07:30:00 Negative depth values due to low tides or low-pressure
system 12/22/95 14:15:00 to 14:45:00 Negative depth values due to low tides or low-pressure
system 12/22/95 19:15:00 to 19:30:00 Negative depth values due to low tides or low-pressure
system 12/23/95 02:00:00 to 02:30:00 Negative depth values due to low tides or low-pressure
system 12/23/95 07:15:00 to 08:00:00 Negative depth values due to low tides or low-pressure
system 12/23/95 15:45:00 to 16:30:00 Negative depth values due to low tides or low-pressure
system 12/23/95 19:15:00 to 20:00:00 Negative depth values due to low tides or low-pressure
system 12/24/95 04:00:00 to 05:00:00 Negative depth values due to low tides or low-pressure
system 12/24/95 07:00:00 to 08:00:00 Negative depth values due to low tides or low-pressure
system 12/24/95 17:00:00 to 19:45:00 Negative depth values due to low tides or low-pressure
system 12/25/95 05:15:00 to 09:00:00 Negative depth values due to low tides or low-pressure
system 12/25/95 17:45:00 to 21:15:00 Negative depth values due to low tides or low-pressure
system 12/26/95 05:45:00 to 10:00:00 Negative depth values due to low tides or low-pressure
system 12/26/95 18:00:00 to 22:30:00 Negative depth values due to low tides or low-pressure
system 12/27/95 06:30:00 to 07:15:00 Negative depth values due to low tides or low-pressure
system 12/27/95 10:15:00 to 11:00:00 Negative depth values due to low tides or low-pressure
system 12/27/95 18:00:00 to 19:00:00 Negative depth values due to low tides or low-pressure
system 12/27/95 23:00:00 to 12/28/95 01:15:00 Negative depth values due to low tides or
low-pressure system 12/28/95 07:30:00 to 10:15:00 Negative depth values due to low tides or
low-pressure system 12/28/95 20:45:00 to 23:00:00 Negative depth values due to low tides or
low-pressure system 12/29/95 22:30:00 to 22:45:00 Negative depth values due to low tides or
low-pressure system 12/29/95 23:45:00 to 12/30/95 00:45:00 Negative depth values due to low
tides or low-pressure system Post deployment information LOGICAL CONSISTENCY REPORT:
NACOMPLETENESS REPORT: Data collection period Ongoing sampling at Taskinas Creek (TC) began
September 12, 1995. Deleted Data Missing Data Missing data is either the result of 1) the YSI
not deployed (exact reason unknown**) 2) a probe not attached 3) a probe malfunction 4) probe
exposure to the atmosphere ** Exact reasons are unknown due to change in staffing. September
1995: TC: 09/01/95 00:00:00 to 09/12/95 10:30:00 YSI not deployed 09/12/95 10:30:00 to 09/30/95
23:45:00 Turbidity probes not yet available. 09/14/95 07:15:00 to 08:00:00 All sensors were out
of water due to low tide 09/14/95 23:00:00 to 09/27/95 09:00:00 DO data (%Sat and mg/l) have
been deleted. It appears that during a low tide the sensors were out of the water. It is
possible that the DO membrane dried out causing readings after this event to drift towards zero.
09/27/95 09:15:00 to 09/30/95 23:45:00 Maintenance October 1995: TC: 10/01/95 00:00:00 to
10/21/95 09:30:00 Maintenance 10/21/95 09:45:00 to 10/31/95 23:45:00 Turbidity probes not yet
available. 10/21/95 09:45:00 to 10/31/95 23:45:00 pH readings drifted possibly due to a bad
probe. The graph of the data clearly indicates a probe malfunction. 10/21/95 09:45:00 to
10/31/95 23:45:00 Suspect DO probe is bad low pre- DO% and high post- DO% usually
indicates a problem with the membrane integrity or the probe itself. 10/30/95 21:45:00 to
10/30/95 23:30:00 All sensors were out of the water due to a low tide November 1995: Note- *
Data not missing TC: 11/01/95 00:00:00 to 11/03/95 16:30:00 Suspect DO probe is bad - low pre-
DO% and high post- DO% usually indicates probe malfunction. 11/01/95 00:00:00 to 11/03/95
16:30:00 pH readings drifted possibly due to a bad probe. The graph of the data indicates a
probe malfunction. 11/01/95 00:00:00 to 11/30/95 23:45:00 No turbidity, probes not yet
available. *11/03/95 16:45:00 Replacement sonde deployed 11/03/95 16:45:00 to 11/17/95 14:15:00
pH readings not recorded due to a broken probe. 11/17/95 14:30:00 to 11/30/95 23:45:00 Depth
data removed; it appears that the depth port may have been plugged resulting in many periods of
negative data and peak depths much lower than normal. *11/17/95 14:30:00 Replacement sonde
deployed December 1995: Note- * Data not missing TC: 12/01/95 00:00:00 to 10:30:00 It appears
that the depth port may have been plugged resulting in many periods of negative data and peak
depths much lower than normal. 12/01/95 00:00:00 to 12/31/95 23:45:00 No turbidity, probes not
yet available. 12/01/95 10:45:00 to 15:00:00 Maintenance 12/01/95 23:45:00 to 12/02/95 01:30:00
All sensors were out of water due to low tide 12/02/95 23:45:00 to 12/03/95 03:00:00 All sensors
were out of water due to low tide 12/03/95 13:15:00 to 15:30:00 All sensors were out of water
due to low tide 12/04/95 01:30:00 to 03:00:00 All sensors were out of water due to low tide
12/10/95 18:00:00 to 20:45:00 All sensors were out of water due to low tide 12/11/95 04:45:00 to
09:30:00 All sensors were out of water due to low tide 12/11/95 16:45:00 to 22:30:00 All sensors
were out of water due to low tide 12/12/95 05:00:00 to 09:30:00 All sensors were out of water
due to low tide 12/12/95 18:15:00 to 21:45:00 All sensors were out of water due to low tide
*12/15/95 17:15:00 Replacement sonde deployed 12/21/95 15:15:00 to 17:00:00 All sensors were out
of water due to low tide 12/22/95 03:00:00 to 06:00:00 All sensors were out of water due to low
tide 12/22/95 15:00:00 to 19:00:00 All sensors were out of water due to low tide 12/23/95
02:45:00 to 07:00:00 All sensors were out of water due to low tide 12/23/95 16:45:00 to 19:00:00
All sensors were out of water due to low tide 12/24/95 05:15:00 to 06:45:00 All sensors were out
of water due to low tide 12/27/95 07:30:00 to 10:00:00 All sensors were out of water due to low
tide 12/27/95 19:15:00 to 22:45:00 All sensors were out of water due to low tide 12/30/95
14:15:00 to 12/31/95 23:45:00 Maintenance Note: The original *.dat and *.csv files were not
found for data collected between 12/15/95 17:15:00 to 12/31/95 23:45:00. The data presented here
is from a *.xls file that was found in the archives. Missing or anomalous data may be the result
of the old the old formatting standard. 12/15/95 17:15:00 to 18:45:00 Negative depth values due
to low tides or low-pressure system 12/19/95 00:00:00 to 02:30:00 Negative depth values due to
low tides or low-pressure system 12/19/95 13:00:00 to 15:45:00 Negative depth values due to low
tides or low-pressure system 12/20/95 01:45:00 to 03:15:00 Negative depth values due to low
tides or low-pressure system 12/20/95 13:45:00 to 16:45:00 Negative depth values due to low
tides or low-pressure system 12/21/95 01:45:00 to 04:45:00 Negative depth values due to low
tides or low-pressure system 12/21/95 14:15:00 to 15:00:00 Negative depth values due to low
tides or low-pressure system 12/21/95 17:15:00 to 18:00:00 Negative depth values due to low
tides or low-pressure system 12/22/95 01:30:00 to 02:45:00 Negative depth values due to low
tides or low-pressure system 12/22/95 06:15:00 to 07:30:00 Negative depth values due to low
tides or low-pressure system 12/22/95 14:15:00 to 14:45:00 Negative depth values due to low
tides or low-pressure system 12/22/95 19:15:00 to 19:30:00 Negative depth values due to low
tides or low-pressure system 12/23/95 02:00:00 to 02:30:00 Negative depth values due to low
tides or low-pressure system 12/23/95 07:15:00 to 08:00:00 Negative depth values due to low
tides or low-pressure system 12/23/95 15:45:00 to 16:30:00 Negative depth values due to low
tides or low-pressure system 12/23/95 19:15:00 to 20:00:00 Negative depth values due to low
tides or low-pressure system 12/24/95 04:00:00 to 05:00:00 Negative depth values due to low
tides or low-pressure system 12/24/95 07:00:00 to 08:00:00 Negative depth values due to low
tides or low-pressure system 12/24/95 17:00:00 to 19:45:00 Negative depth values due to low
tides or low-pressure system 12/25/95 05:15:00 to 09:00:00 Negative depth values due to low
tides or low-pressure system 12/25/95 17:45:00 to 21:15:00 Negative depth values due to low
tides or low-pressure system 12/26/95 05:45:00 to 10:00:00 Negative depth values due to low
tides or low-pressure system 12/26/95 18:00:00 to 22:30:00 Negative depth values due to low
tides or low-pressure system 12/27/95 06:30:00 to 07:15:00 Negative depth values due to low
tides or low-pressure system 12/27/95 10:15:00 to 11:00:00 Negative depth values due to low
tides or low-pressure system 12/27/95 18:00:00 to 19:00:00 Negative depth values due to low
tides or low-pressure system 12/27/95 23:00:00 to 12/28/95 01:15:00 Negative depth values due to
low tides or low-pressure system 12/28/95 07:30:00 to 10:15:00 Negative depth values due to low
tides or low-pressure system 12/28/95 20:45:00 to 23:00:00 Negative depth values due to low
tides or low-pressure system 12/29/95 22:30:00 to 22:45:00 Negative depth values due to low
tides or low-pressure system 12/29/95 23:45:00 to 12/30/95 00:45:00 Negative depth values due to
low tides or low-pressure system LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Additional
Description: Entry verification The data were uploaded to the PC from the YSI 6000 data loggers
and reviewed using PC6000 software from YSI. Graphs were produced and examined using the PC6000
software then printed out and filed in order to aid in reviewing data to correlate any anomalous
and outlying data. Next, files were uploaded in comma delimited format which were opened in
Excel 5.0 software and edited to remove extraneous information (headers, footers, spaces, and
pre- and post-deployment data). Monthly templates were used to form complete sets of monthly
data sets. Macros supplied by NERRS/CDMO were used to help with editing, formatting and
identifying outliers in the database. Suspect data (as in data believed to result from a damaged
or biofouled probe) were evaluated according to Appendix B of the CDMO manual, edited and
documented. Missing data due to YSI maintenance (down time) were inserted into the spreadsheet
and denoted by periods (.). Data that were not within calibration range of the instrument were
evaluated and removed from the record and denoted by periods. Edited and raw data files were
copied and archived in the Chesapeake Bay National Estuarine Research Reserve Virginia
(CBNERRVA) file server and uploaded to the CDMO FTP site. All Taskinas Creek files from 1995
have been verified using the latest update of the Microsoft Excel 5.0 macro programs which
identified outliers (values that fall outside of the calibration range see section
II.8 of this document) and other erroneous data. Outliers were determined according to the
instruments manufacturers manual. Rob Breeding edited data from 9/95-12/95. Bill
Seufzer updated and corrected the Rob Breeding edited data. Tammy Dorman processed the data
through the latest update of the CDMO macro and conducted final editing of the data. Following
final editing, Tammy Dorman uploaded the database to the CBNERRVA server and to CDMO. 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.
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
Phone:
804-684-7119
Email:
wreay at vims.edu
Contact Address:
Virginia Institute of Marine Science, College of William and Mary
P.O. Box 1346
City:
Gloucester Point
Province or State:
Virginia
Postal Code:
23062
Country:
USA
Creation and Review Dates
DIF Creation Date:
2006-02-08
Last DIF Revision Date:
2009-06-02
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