CBM NERR Nutrient Metadata April-December 2003 Latest Update: February 21, 2005
Entry ID:
CDMO_cbmnut04-12.03m
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Summary
Abstract:
Nutrient monitoring is conducted at 26 National Estuarine Research Reserves (NERR) from
four locations within or adjacent to the reserve on a monthly basis of the following parameters:
orthophosphate, ammonium, nitrite, nitrate, and chlorophyll a. Note: Reserves may collect
additional parameters which are available by searching the Yearly Files directory.
Purpose:
Research objectives The principal objectives are to collect and analyze water samples for nutrient concentrations for the Chesapeake Bay National Estuarine Research Reserve in Maryland (CBM NERR) in support of the National Estuarine Research Reserve's (NERR) System Wide Monitoring Program (SWMP). This nutrient information supplements water quality ... information taken at sites
for the purpose of: 1) tracking and recording nutrient conditions useful to help understand and
explain additional data (water quality and meteorological) collected concurrently 2) creating a
database capable of detecting long-term changes in nutrient conditions of these systems 3)
recording and identifying temporal and spatial differences in nutrient conditions to include
changes on a diel time frame and to collect ancillary data in support of other research efforts.
At CBM NERR, water quality and nutrient data were collected at four sites during 2003. Three
sites are at the Jug Bay Component of the Reserve and one site is at the Otter Point Creek
Component. The three sites at Jug Bay were selected in an effort examine water quality and
nutrient information across different spatial scales and at sites demonstrating different levels
of anthropogenic activities. The site at Otter Point Creek was selected to provide baseline
information for the Otter Point Creek site and to use for comparison to one or more of the Jug
Bay sites. Due to the location of the sites being 2 to 3 hours away from each other and because
they are completely different systems, Otter Point Creek was not sampled on the same day as the
other three sites, instead Otter Point Creek was sampled the following day after the other sites
were sampled. Prior to 2003, water quality data was collected at two sites, JB and PR. Both
sites were moved in 2003; however the old PR site was located about 500m downstream of the new
RR site and therefore should not be significantly different from the new and old site. The old
JB site was permanently removed due to concerns with adequate water depth, and no similar site
exists. a) Monthly Grab Sampling Program The goals of the monthly grab samples are to create a
long-term database of nutrient information at each site for the purpose of detecting changes
over time and across sites. b) Diel Sampling Program The goal of the diel sampling is to catalog
short-term variability in nutrient concentrations across different tidal cycles.
SUPPLEMENTAL INFORMATION:
Associated researchers and projects The Jug Bay Wetlands Sanctuary staff has been
collecting weekly to monthly temperature, salinity, dissolved oxygen, and nutrient samples at
the same location as the data logger at JB through 2003. Additionally, the staff samples at
other sites throughout the Jug Bay marsh, which provide additional similar data at a larger
spatial scale. Staff at the Anita C. Leight Estuary Center at Otter Point Creek, in conjunction
with CBNERR/MD staff, has also been collecting bi-weekly to monthly temperature, salinity,
dissolved oxygen, total suspended solids, chlorophyll a, and nutrient samples at the same
location as datalogger OC and 5 other sites in the OPC marsh for 2003. Additional discrete data
and semi-continuous wq and nutrient data is also available through the Department of Natural
Resources Continuous Monitoring Program (see www.eyesonthebay.net) that provides increased
spatial coverage of many of the same parameters around both RR and OC sites for 2003. Other
Remarks The 2003 sampling year was an unusually wet and cool year for the Chesapeake Bay region
with very high rainfalls and cooler temperatures. As such, data from this year may be atypical
compared to future more "normal" years. On September 19, 2003, Hurricane Isabel came onshore in
the Chesapeake Bay region creating unusually high tides, flooding and high winds. The hurricane
lasted from September 19-25, 2003 with the bulk of the rain event happening on September 19 with
an additional rainstorm occurring on September 21, 2003 bringing additional flooding to an
already super saturated region. The hurricane brought severe flooding to the Chesapeake region,
lasting for several days following the actual hurricane. The flooding and high waters associated
with the hurricane drove a salt wedge up the Bay creating higher then normal salinities and
extreme high tides. Outside of a pulsed event of flooding, high salinities, larger inflows of
freshwater and high turbidities, the affects of the Hurricane on Chesapeake Bay ecosystem were
short and not terribly strong compared to similar storms such as Hurricane Floyd, which hit at
low tide and cause severe scouring and erosion during a critical season. For more information on
the effects of Hurricane Isabel, contact USGS or MDNR. Diel sampling switched to beginning of
the month starting in October to reduce scheduling conflicts with the arrival of the holiday
season.
CURRENTNESS REFERENCE:
Observed
SPATIAL DATA ORGANIZATION INFORMATION:
Indirect Spatial Reference: Site location and character The Chesapeake Bay National Estuarine Research Reserve in
Maryland consists of three components; Otter Point Creek on the Bush River along the upper
western shore of the Chesapeake Bay, Jug Bay along the Patuxent River in the middle Bay and
Monie Bay on the lower eastern shore of the Chesapeake Bay. At CBM NERR, water quality and
nutrient data are collected at four sites. Three sites are at the Jug Bay Component of the
Reserve and one site is at the Otter Point Creek Component. The Jug Bay Component of the Reserve
is located in the tidal headwaters of the Patuxent River. The watershed for this portion of the
river includes portions of the DC Metropolitan area but has dense, tracks of protected riparian
areas surrounding this portion of the river. Jug Bay itself, is a 722-acre tidal estuary
providing a narrow transition zone between brackish marshes and upland freshwater wetlands. The
broad, shallow waters of Jug Bay support a profusion of freshwater plants and animals.
Vegetation crowds the river channel and forms an interlaced pattern of tidal and non-tidal
marshes, swamps and forested wetlands surrounded by upland woods and fields. The Otter Point
Creek Component of the Reserve is located along the tidal headwaters of the Bush River, which
drains much of Harford County, including the rapidly growing town of Bel Air, Maryland. Otter
Point Creek is a tributary of the Bush River in the upper Chesapeake Bay and consists of 672
acres of open water, tidal marshes, forested wetlands and upland hardwood forests, surrounded by
major highways, large residential communities, and heavy commercial and industrial development.
The following is a list of sites with a detailed description of site characteristics and other
relevant information. Mataponi Creek (MC) 38° 44.599'N, 76° 42.446'W (NAD83) or 38.74331667,
-76.70743333 (GIS format) Site MC is located at the Jug Bay Component of the Reserve, in a small
tributary (Mataponi Creek) off the upper tidal headwaters of the Patuxent River, Maryland. MC is
2.4 km upstream from the mouth and located in the midchannel of the creek, which is
approximately 7m wide at that point. The southern bank is steep and covered mainly with hardwood
trees while the Northern bank is tidal marsh. The YSI water quality sonde was deployed
vertically in a perforated PVC pipe. Average depth at this site is roughly 0.7 meters with a
mean tidal fluctuation of approximately 0.6 m. The YSI is deployed 0.25 m off of the creek
bottom. Salinities at this site rarely exceed 0.1 ppt. The bottom habitat is soft sediment, and
submerged macrophytes are abundant and dense during the summer months. Because this site is
located along the main channel of the Mataponi Creek, water quality is reflective of the general
quality of water flowing along the main portion of the creek. The submerged macrophyte community
at this site is seasonally very dense and thus water quality is thought to be strongly
influenced by the presence of SAV during the summer months. Because of the dense submerged
macrophyte community, limited degree of anthropogenic activities occurring within the watershed
of this site, MC is thought to be a "reference" water quality site for the Reserve. Railroad
Bridge (RR) 38° 46.877'N, 76° 42.822'W (NAD 83) or 38.78128333, -76.7137 (GIS format) Site RR
is located in the mainstem of the upper tidal headwaters of the Patuxent River, Maryland. The
site is slightly upstream (roughly 0.3km) from Jackson's Landing at the Patuxent River Park
(previous PR site). This section of the Patuxent River is approximately 70m wide and average
depth at the site is 1.4m. The YSI sonde is deployed 0.25 m off of the river bottom. Bottom
habitat is soft sediment, and submerged macrophyte grassbeds are evident in the shallow areas
(0.5m MLW) during summer months. Mean tidal fluctuation is approximately 0.6 m. Salinity
in 2003 ranged from 0.05 - 0.4 ppt. In 2003 this site was moved from 38° 46' 50.6" N, 76° 42'
29.1" W (Jug Bay) to its present location because of the shallow nature of the old site. The new
site location (RR) is at the end of the old railroad bed and is deployed vertically in a
perforated PVC pipe near midchannel of the Patuxent River. Because this site is located along
the main channel of the Patuxent River, water quality is reflective of the general quality of
water flowing along the main portion of the river. The site is roughly 1km downstream of the
confluence of the Western Branch tributary and the Patuxent River Mainstem, thus water quality
is influenced by Western Branch. A large wastewater treatment plant (averaging 10-20 mgd )
discharges directly into the Western Branch tributary of the Patuxent River just upstream of IP.
Because of the location of this site along the main portion of the Patuxent River, this site is
thought to be characteristic of this portion of the Patuxent River. Iron Pot Landing (IP) 38°
47.760'N, 76° 43.248' W (NAD 83) or 38.796, -76.7208 (GIS Format) Site IP is located 2.09km
from the mouth of Western Branch. IP is attached vertically off of a small pier near midchannel
of the river and has an average depth of 1.6m. The YSI is deployed 0.25 m off of the river
bottom. The site is roughly 1km downstream of a large (10-20 mgd) wastewater treatment plant
effluent discharge site. The river is approximately 15m wide and flows through extensive
riparian buffers. Both banks of the river are flanked by hardwood flora. Tides are semi-diurnal
and mean tidal fluctuation is approximately 0.6 m. Salinity at this site is generally 0.1 ppt.
Bottom habitat is soft sediment, and narrow submerged macrophyte grassbeds are occasionally
evident in the shallow areas downstream during the summer months. Because of the proximity of
this site to the discharge location for a large WWTP, this site is considered an "impacted" site
for the reserve. This site is part of the NERR build out and is new for 2003. Otter Point Creek
(OC) 39° 27.047'N, 76° 16.474'W (NAD 83) or 39.45078333, -76.27456667 (GIS Format) Site OC is
located within the Otter Point Creek Component of the Reserve, in the tidal headwaters of the
Bush River. The Otter Point Creek component is a large but shallow tidally flooded marsh with
average depths less then 1m on low tide. The site is approximately 0.3km from the Anita C.
Leight Estuary Center. Site OC is deployed vertically in a perforated PVC pipe and has an
average depth of 0.7m. The YSI is deployed 0.25 m off of the creek bottom. Bottom habitat is
extremely soft sediment, and submerged macrophyte grassbeds inundate the site during summer
months, creating a dense and almost impenetrable ground cover. Salinity at this station rarely
rises above 0.1 ppt. Tides in Otter Point Creek are semi-diurnal and have a mean range of about
0.3 m. The average water levels are generally lower in the winter due to north and northwest
winds that increase the egress from Chesapeake Bay. The sonde was periodically exposed to very
low tides, and sediments at the site are extremely fine and flocculent. Because of the
shallowness of the tidal marsh, coupled with the dramatic daily changes in the depth,
deployments at the site presented many problems. These problems included periodic exposure of
the sonde, very high turbidity and sedimentation rates associated with tidal infiltration and
wind and wave generated resuspension, which caused severe fouling of the probes. Water quality
at the site represented 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. Additionally, the site was dominated by dense SAV communities from
June-October 2003 and thus water quality conditions were likely influenced by the presence of
these macrophytes. This site is thought to be representative of water quality within the Otter
Point Creek component throughout most of the year, with the exception of the summer months when
dense submerged macrophyte communities greatly influence the site. 
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:
Julie Bortz-Research, Catherine DiBlasi,,John Zimmerelli, Carl Zimmermann,
Chris Heyer
Dataset Title:
CBM NERR Nutrient Metadata April-December 2003 Latest Update: February 21, 2005
Dataset Release Date:
2006-02-23
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:
2003-04-01
Stop Date:
2003-12-31
Quality
ATTRIBUTE ACCURACY REPORT: Limits of Detection Dates in use for 2003. Methods References,
and Holding Times and Conditions. Parameter (Units) Detection Limit (or Range) Method Reference
Holding Time and Condition Orthophosphate (mg/L as P) 0.0006 mg/L EPA method 365.1 (EPA 1979)
Freezing-28 d Total Diss. Phosphorus (mg/L as P) 0.001 ... mg/L Valderrama (1981) Freezing-28 d
Particulate Phosphorus (mg/L as P) 0.0024 mg/L Aspila et al. (1976) Freezing-28 d Nitrite (mg/L
as N) 0.0002 mg/L EPA method 353.2 (EPA 1979) Freezing-28 d Nitrite + Nitrate (mg/L as N) 0.0007
mg/L EPA method 353.2 (EPA 1979) Freezing-28 d Ammonium (mg/L as N) 0.003 mg/L EPA method 350.1
(EPA 1979) Freezing-28 d Total Dissolved Nitrogen (mg/L as N) 0.02 mg/L D=Elia et al. (1977)
Valderrama (1981) Freezing-28 d Particulate Organic Nitrogen (mg/L as N) 0.0105 mg/L EPA method
440.0 (EPA 1997) Freezing-28 d Particulate Carbon (mg/L as C) 0.0633 mg/L EPA method 440.0 (EPA
1997) Freezing-28 d Silica (mg/L as Si) 0.01 mg/L Technicon (1977) 4 °C - 28 d Total Suspended
Solids (mg/L) 2.4 mg/L EPA method 160.2 (with slight modification) EPA (1979); APHA (1975)
Freezing-28 d Total Volatile Solids 0.9 mg/L APHA method 208 E (with modification) APHA (1975)
Freezing-28 d Chlorophyll a (µg/L) Pheophytin a (µg/L) 0.1 µg/L APHA (1981) Freezing-28 d 0.1
µg/L APHA (1981) Freezing-28 d The MDL is determined as 3 times the standard deviation of a
minimum of 7 replicates of a single low concentration sample. Reporting of Missing Data and Data
with Concentrations Lower than Method Detection Limits Nutrient/Chla comment codes and
definitions are provided in the following table. Missing data are denoted by a blank cell " "
and commented coded with an "M". Laboratories in the NERRS System submit data that are censored
at a lower detection rate limit, called the Method Detection Limit or MDL. MDL's for specific
parameters are listed in the Laboratory Methods and Detection Limits Section (Section II, Part
12) of this document. Concentrations that are less than this limit are denoted by a -9999 and
comment coded with a "B" in the variable code comment column. For example, the measured
concentration of NO23F was 0.0005 mg/l as N (MDL=0.0008), the reported value would be -9999 with
a "B" placed in the NO23F comment code column. Calculated parameters are comment coded with a
"C" and if any of the components used in the calculation are below the MDL, the calculated
variable is denoted by -9999 and also comment coded with a "B". If a calculated value is
negative, the value is reported as a -9999. Variable Comment Codes Comment Code Definition A
Value above upper limit of method detection B Value below method detection limit C Calculated
value D Data deleted or calculated value could not be determined due to deleted data, see
metadata for details H Sample held beyond specified holding time K Check metadata for further
details M Data missing, sample never collected or calculated value could not be determined due
to missing data P Significant precipitation (reserve defined, see metadata for further details)
U Lab analysis from unpreserved sample S Data suspect, see metadata for further details Samples
collected April through October with a Rep Code of 1 were filtered for all reported parameters.
Samples collected April through October with a Rep Code of 2 were filtered for core NERR
nutrients (Chl A, TSS/TVS, Nitrite, Nitrate, Orthophosphate, Ammonium, Total Nitrogen, and Total
Phosphorous). All samples collected November through March are core NERR nutrients only. Diel
Samples were collected at the Rail Road Bridge site. Collection of these samples did not begin
until July of 2003 due to CBM NERR being one year behind the rest of reserves build out of the
nutrient sampling. CBM NERR also lacked a Sigma sampler, or ISCO sampler. A sampler was
purchased in September of 2003 and until this purchase a borrowed SIGMA sampler was used for
sampling. All TN, TP values for duplicates and Diel samples represent only dissolved portion of
Nitrogen (TDP and TDN) in the system. Field Teams had been submitting filtrate to the labs with
out particulate pads. In 2004 this has been rectified and whole water samples are being sent to
the labs. Anomalous Total Nitrogen and Total Dissolved Nitrogen Data TN Data missing due to lab
accident: Date Time Station Code Monitor Program Rep 7/29/2003 8:15 cbmrrnut 1 1 9/2/2003 11:00
cbmocnut 1 1 TDN Data missing due to lab accident: Date Time Station Code Monitor Program Rep
7/29/2003 8:15 cbmrrnut 1 1 8/26/2003 9:45 cbmrrnut 1 2 9/2/2003 11:00 cbmocnut 1 1 The
following TN data is missing the PN component of the calculation due to a result of submitting
filtered samples instead of whole water samples to the lab; therefore TN could not be
calculated. Date Time Station Code Monitor Program Rep 11/12/2003 11:20 cbmocnut 1 1 11/13/2003
9:30 cbmrrnut 1 1 11/13/2003 10:45 cmbipnut 1 1 11/13/2003 11:45 cbmmcnut 1 1 11/25/2003 12:15
cbmocnut 1 1 11/26/2003 9:45 cbmrrnut 1 1 11/26/2003 11:45 cmbipnut 1 1 11/26/2003 12:45
cbmmcnut 1 1 12/9/2003 11:30 cbmocnut 1 1 12/11/2003 0:15 cbmmcnut 1 1 12/11/2003 10:15 cbmrrnut
1 1 12/11/2003 11:15 cmbipnut 1 1 12/23/2003 8:00 cbmmcnut 1 1 12/23/2003 9:00 cmbipnut 1 1
12/23/2003 10:00 cbmrrnut 1 1 Anomalous Chlorophyll/Phaephytin Data Phaephytin data rejected and
deleted through QA/QC procedures 6/3/2003 12:15 6/10/2003 12:30 6/17/2003 9:45 6/24/2003 8:30
7/1/2003 8:00 7/15/2003 9:15 7/29/2003 11:45 9/2/2003 13:30 9/10/2003 8:45 9/23/2003 8:15
10/7/2003 9:30 10/28/2003 9:30 10/28/2003 12:30 10/29/2003 10:15 Chlorophyll data rejected and
deleted through QA/QC procedures 6/3/2003 12:15 6/10/2003 12:30 6/17/2003 9:45 6/24/2003 8:30
7/1/2003 8:00 7/15/2003 9:15 9/2/2003 13:30 9/10/2003 8:45 10/7/2003 9:30 10/28/2003 9:30
10/29/2003 10:15 Anomalous Nitrogen Data Missing NH4, NO2, NO23, NO3 data 7/30/2003 11:00
Anomalous Phosphorous Data Orthophosphate (PO4) data missing: Date Time Station Code Monitor
Program Rep 7/30/2003 11:00 cbmrrnut 2 1 9/25/2003 0:00 cbmrrnut 2 1 9/25/2003 2:30 cbmrrnut 2 1
9/25/2003 5:00 cbmrrnut 2 1 9/25/2003 7:30 cbmrrnut 2 1 9/25/2003 10:00 cbmrrnut 2 1 9/25/2003
12:30 cbmrrnut 2 1 12/3/2003 4:00 cbmrrnut 2 1 12/3/2003 6:30 cbmrrnut 2 1 12/3/2003 9:00
cbmrrnut 2 1 Particulate Phosphorus (PHOSP) data missing: Date Time Station Code Monitor Program
Rep 7/29/2003 8:15 cbmrrnut 1 2 7/29/2003 9:45 cmbipnut 1 2 7/29/2003 11:45 cbmmcnut 1 2
7/29/2003 10:00 cbmrrnut 2 1 7/29/2003 12:30 cbmrrnut 2 1 7/29/2003 15:00 cbmrrnut 2 1 7/29/2003
17:30 cbmrrnut 2 1 7/29/2003 20:00 cbmrrnut 2 1 7/29/2003 22:30 cbmrrnut 2 1 7/30/2003 1:00
cbmrrnut 2 1 7/30/2003 3:30 cbmrrnut 2 1 7/30/2003 6:00 cbmrrnut 2 1 7/30/2003 8:30 cbmrrnut 2 1
7/30/2003 11:00 cbmrrnut 2 1 7/30/2003 10:00 cbmocnut 1 2 8/26/2003 9:45 cbmrrnut 1 2 8/26/2003
11:15 cmbipnut 1 2 8/26/2003 12:45 cbmmcnut 1 2 8/27/2003 12:15 cbmocnut 1 2 9/23/2003 8:15
cbmrrnut 1 2 9/23/2003 10:30 cmbipnut 1 2 9/23/2003 12:15 cbmmcnut 1 2 10/28/2003 9:30 cbmrrnut
1 2 10/28/2003 11:15 cbmmcnut 1 2 10/28/2003 12:30 cmbipnut 1 2 10/29/2003 10:15 cbmocnut 1 2
11/12/2003 11:20 cbmocnut 1 1 11/13/2003 9:30 cbmrrnut 1 1 11/13/2003 10:45 cmbipnut 1 1
11/13/2003 11:45 cbmmcnut 1 1 11/25/2003 12:15 cbmocnut 1 1 11/25/2003 12:15 cbmocnut 1 2
11/26/2003 9:45 cbmrrnut 1 1 11/26/2003 9:45 cbmrrnut 1 2 11/26/2003 11:45 cmbipnut 1 1
11/26/2003 11:45 cmbipnut 1 2 11/26/2003 12:45 cbmmcnut 1 1 11/26/2003 12:45 cbmmcnut 1 2
12/9/2003 11:30 cbmocnut 1 1 12/11/2003 0:15 cbmmcnut 1 1 12/11/2003 10:15 cbmrrnut 1 1
12/11/2003 11:15 cmbipnut 1 1 12/23/2003 8:00 cbmmcnut 1 1 12/23/2003 8:00 cbmmcnut 1 2
12/23/2003 9:00 cmbipnut 1 1 12/23/2003 9:00 cmbipnut 1 2 12/23/2003 10:00 cbmrrnut 1 1
12/23/2003 10:00 cbmrrnut 1 2 Date Time Station Code Monitor Program Rep 9/24/2003 11:30
cbmrrnut 2 1 9/24/2003 14:00 cbmrrnut 2 1 9/24/2003 16:30 cbmrrnut 2 1 9/24/2003 19:00 cbmrrnut
2 1 9/24/2003 21:30 cbmrrnut 2 1 9/25/2003 0:00 cbmrrnut 2 1 9/25/2003 2:30 cbmrrnut 2 1
9/25/2003 5:00 cbmrrnut 2 1 9/25/2003 7:30 cbmrrnut 2 1 9/25/2003 10:00 cbmrrnut 2 1 9/25/2003
12:30 cbmrrnut 2 1 10/1/2003 9:30 cbmrrnut 2 1 10/1/2003 12:00 cbmrrnut 2 1 10/1/2003 14:30
cbmrrnut 2 1 10/1/2003 17:00 cbmrrnut 2 1 10/1/2003 19:30 cbmrrnut 2 1 10/1/2003 22:00 cbmrrnut
2 1 10/2/2003 0:30 cbmrrnut 2 1 10/2/2003 3:00 cbmrrnut 2 1 10/2/2003 5:30 cbmrrnut 2 1
10/2/2003 8:00 cbmrrnut 2 1 10/2/2003 10:30 cbmrrnut 2 1 10/28/2003 11:30 cbmrrnut 2 1
10/28/2003 14:00 cbmrrnut 2 1 10/28/2003 16:30 cbmrrnut 2 1 10/28/2003 19:00 cbmrrnut 2 1
10/28/2003 21:30 cbmrrnut 2 1 10/29/2003 0:00 cbmrrnut 2 1 10/29/2003 2:30 cbmrrnut 2 1
10/29/2003 5:00 cbmrrnut 2 1 10/29/2003 7:30 cbmrrnut 2 1 10/29/2003 10:00 cbmrrnut 2 1
10/29/2003 12:30 cbmrrnut 2 1 12/2/2003 10:30 cbmrrnut 2 1 12/2/2003 13:00 cbmrrnut 2 1
12/2/2003 15:30 cbmrrnut 2 1 12/2/2003 18:00 cbmrrnut 2 1 12/2/2003 20:30 cbmrrnut 2 1 12/2/2003
23:00 cbmrrnut 2 1 12/3/2003 1:30 cbmrrnut 2 1 12/3/2003 4:00 cbmrrnut 2 1 12/3/2003 6:30
cbmrrnut 2 1 12/3/2003 9:00 cbmrrnut 2 1 12/3/2003 11:30 cbmrrnut 2 1 Phosp. Data rejected
(deleted) through QA/QC Date Time Station Code Monitor Program Rep 6/10/2003 15:30 cbmmcnut 1 1
10/1/2003 11:00 cbmmcnut 1 1 Phosp data is suspect and flagged by Lab. Value exceed a
theoretical equivalent, but is within analytical precision . Date Time Station Code Monitor
Program Rep 9/23/2003 8:15 cbmrrnut 1 1 9/23/2003 10:30 cmbipnut 1 1 10/7/2003 10:45 cbmmcnut 1
1 Anomalous TSS/TVS data TSS data rejected (deleted) through QA/QC Date Time Station Code
Monitor Program Rep 7/29/2003 11:45 cbmmcnut 1 1 7/30/2003 10:00 cbmocnut 1 1 8/5/2003 10:15
cbmmcnut 1 1 8/12/2003 11:00 cbmmcnut 1 1 9/2/2003 14:15 cbmmcnut 1 1 10/1/2003 11:00 cbmmcnut 1
1 10/29/2003 10:15 cbmocnut 1 2 TVS data rejected through QA/QC Date Time Station Code Monitor
Program Rep 7/29/2003 11:45 cbmmcnut 1 1 7/30/2003 10:00 cbmocnut 1 1 7/30/2003 10:00 cbmocnut 1
2 8/5/2003 10:15 cbmmcnut 1 1 8/12/2003 11:00 cbmmcnut 1 1 8/27/2003 12:15 cbmocnut 1 1
8/27/2003 12:15 cbmocnut 1 2 9/2/2003 14:15 cbmmcnut 1 1 9/18/2003 8:15 cbmmcnut 1 1 10/1/2003
11:00 cbmmcnut 1 1 TSS data below method detection limit (MDL) Date Time Station Code Monitor
Program Rep 7/30/2003 10:00 cbmocnut 1 2 8/27/2003 12:15 cbmocnut 1 1 8/27/2003 12:15 cbmocnut 1
2 9/18/2003 8:15 cbmmcnut 1 1 9/25/2003 0:00 cbmrrnut 2 1 9/25/2003 2:30 cbmrrnut 2 1 9/25/2003
5:00 cbmrrnut 2 1 9/25/2003 7:30 cbmrrnut 2 1 9/25/2003 10:00 cbmrrnut 2 1 9/25/2003 12:30
cbmrrnut 2 1 12/3/2003 4:00 cbmrrnut 2 1 12/3/2003 6:30 cbmrrnut 2 1 12/3/2003 9:00 cbmrrnut 2 1
TVS data below method detection limit (MDL) Date Time Station Code Monitor Program Rep 4/29/2003
9:00 cmbipnut 1 1 TSS/TVS flagged (K) for incorrect sample fraction used (i.e. volume on filter
sheet did not match volume recorded on foil pouch - lab had to choose a number) Date Time
Station Code Monitor Program Rep 5/13/2003 9:45 cmbipnut 1 1 Anomalous Diel Data July 03 Diel
data reflects only core NERR nutrients only. Dissolved samples (TDP) were submitted instead of
whole water samples and could not calculate TP, with the exception of the following TDP data
(missing). Date Time Station Code Monitor Program Rep 7/29/2003 8:15 cbmrrnut 1 2 8/26/2003 9:45
cbmrrnut 1 2 Last sample not taken due to power failure. Date Time Station Code Monitor Program
Rep 7/30/2003 11:00 cbmrrnut 2 1 No Diel data sampled in August. Lost use of our loaner SIGMA
sampler and purchased an ISCO sampler. September TDP at 1100 lost due to lab accident - broken
test tube Date Time Station Code Monitor Program Rep 09/2/03 11:00 cbmocnut 1 1 September Diel
sampling had a power failure after five samples. Data missing for the following dates and times:
Date Time Station Code Monitor Program Rep 9/25/2003 0:00 cbmrrnut 2 1 9/25/2003 2:30 cbmrrnut 2
1 9/25/2003 5:00 cbmrrnut 2 1 9/25/2003 7:30 cbmrrnut 2 1 9/25/2003 10:00 cbmrrnut 2 1 9/25/2003
12:30 cbmrrnut 2 1 TDN/TDP at 1400 lost due to lab accident - tube cracked in freezer. Date Time
Station Code Monitor Program Rep 9/24/2003 14:00 cbmrrnut 2 1 Late October (10/28 and 10/29)
Diel samples used as November Sampling due to scheduling conflicts. October(November) TDN/TDP at
0000 lost due to lab accident - tube cracked in freezer. Date Time Station Code Monitor Program
Rep 10/29/2003 0:00 cbmrrnut 2 1 10/29/2003 12:30 cbmrrnut 2 1 December Diel sampler stopped
after 7 samples due to a frozen intake tube. Sample resumed after tube thawed out for the final
sample. The following data are missing: Date Time Station Code Monitor Program Rep 12/3/2003
4:00 cbmrrnut 2 1 12/3/2003 6:30 cbmrrnut 2 1 12/3/2003 9:00 cbmrrnut 2 1 QA/QC Programs
Precision Field Variability - The Maryland Department of Natural Resources (MDNR) maintains CBM
NERR sites in conjunction with their Continuous Monitoring Program, which maintains over 30
sites where water quality and nutrient data are collected. As such, field variability is checked
with 10% of all samples being taken as duplicates. These duplicate samples are field duplicates
taken as a replicate, or additional sample, taken concurrently at the time of sampling.
Laboratory Variability - The Chesapeake Biological Laboratory (CBL) is responsible for analyzing
CBM NERR nutrient samples as well as other nutrient samples taken through MDNR's Continuous
Monitoring Program. CBL verifies the quality of their analytical process by running 10% of all
samples through an additional test to duplicate procedures and check the accuracy of their
reporting. Inter-organizational splits - All nutrient parameters for CBM NERR were analyzed by
CBL with the exception of Chlorophyll A which is sent to the Department of Health and Mental
Hygene (DHMH) where samples are analyzed using the same procedures as CBL but at no cost to CBM
NERR and MDNR. DHMH is an EPA certified laboratory. Accuracy Sample Spikes - Sample outliers
range from 85 to 115 percent. CBL typically gets 90 to 110 percent recovery. Standard Reference
Material Analysis - none Cross Calibration Exercises - Nutrient Analytical Services has
participated in many cross calibration exercises. Participation in such programs is an excellent
means of determining accuracy of results. Examples of such cross calibration exercises include
the Chesapeake Bay Program Quarterly Split Samples, Chesapeake Bay Program Blind Audits, USGS
Standard Reference Sample Project, US EPA Method Validation Studies and International Council
for the Exploration of the Sea Intercomparison Exercise for Nutrients in Sea Water. LOGICAL
CONSISTENCY REPORT: NACOMPLETENESS REPORT: Data collection period Nutrient samples were
collected using an Alpha Bottle or ISCO Sampler. At Railroad Bridge (Jug Bay Wetlands
Sanctuary)(RR) samlping began on April 4, 2003 and continued through December 23, 2003; Mataponi
Creek (MTI) began April 22,2003 and continued through December 23, 2003; Iron Pot Landing (IP)
began April 4, 2003 and continued through December 23, 2003; and Otter Point Creek (OC) began
April 15, 2003 and continued through December 09, 2003. (RR) Railroad Monthly Grab Sampling Date
Time Collected 4/4/2003 13:00 4/8/2003 8:15 4/15/2003 10:45 4/22/2003 7:15 4/29/2003 7:45
5/6/2003 10:15 5/13/2003 8:15 5/20/2003 8:15 5/28/2003 9:00 6/3/2003 10:30 6/10/2003 8:00
6/17/2003 8:30 6/24/2003 8:30 7/1/2003 6:45 7/8/2003 8:30 7/15/2003 7:45 7/22/2003 7:30
7/29/2003 8:15 7/29/2003 8:15 * 8/5/2003 8:00 8/12/2003 8:30 8/19/2003 8:30 8/26/2003 9:45
8/26/2003 9:45 * 9/2/2003 12:00 9/10/2003 7:30 9/23/2003 8:15 9/23/2003 8:15 * 10/1/2003 8:15
10/7/2003 8:30 10/14/2003 8:00 10/22/2003 9:00 10/28/2003 9:30 10/28/2003 9:30 * 11/13/2003 9:30
11/26/2003 9:45 11/26/2003 9:45 * 12/11/2003 10:15 12/23/2003 10:00 12/23/2003 10:00 * *
Duplicate Sample (RR) Railroad Diel Grab Sampling Begin Date Begin Time End Date End Time
7/29/2003 10:00 7/30/2003 11:00 9/24/2003 11:30 9/25/2003 12:30 10/1/2003 9:30 10/2/2003 10:30
*10/28/2003 11:30 10/29/2003 12:30 12/2/2003 10:30 12/3/2003 11:30 *Late October (10/28 - 10/29)
diel samples used as November sampling due to scheduling conflicts. (MC) Mataponi Creek Date
Time Collected 4/22/2003 9:30 4/29/2003 10:15 5/6/2003 12:45 5/13/2003 11:15 5/20/2003 10:45
5/28/2003 11:30 6/3/2003 13:30 6/10/2003 15:30 6/17/2003 11:00 6/24/2003 10:45 7/1/2003 9:15
7/8/2003 11:00 7/15/2003 11:00 7/22/2003 9:45 7/29/2003 11:45 7/29/2003 11:45 * 8/5/2003 10:15
8/12/2003 11:00 8/19/2003 11:00 8/26/2003 12:45 8/26/2003 12:45 * 9/2/2003 14:15 9/10/2003 10:00
9/18/2003 8:15 9/23/2003 12:15 9/23/2003 12:15 * 10/1/2003 11:00 10/7/2003 10:45 10/14/2003
11:15 10/22/2003 11:30 10/28/2003 11:15 10/28/2003 11:15 * 11/13/2003 11:45 11/26/2003 12:45
11/26/2003 12:45 * 12/11/2003 0:15 12/23/2003 8:00 12/23/2003 8:00 * * Duplicate Sample (IP)
Iron Pot Landing Date Time 4/4/2003 14:00 4/8/2003 9:45 4/15/2003 12:30 4/22/2003 8:00 4/29/2003
9:00 5/6/2003 11:30 5/13/2003 9:45 5/20/2003 9:30 5/28/2003 10:15 6/3/2003 12:15 6/10/2003 12:30
6/17/2003 9:45 6/24/2003 9:45 7/1/2003 8:00 7/8/2003 9:45 7/15/2003 9:15 7/22/2003 8:30
7/29/2003 9:45 7/29/2003 9:45 * 8/5/2003 9:15 8/12/2003 9:45 8/19/2003 10:00 8/26/2003 11:15
8/26/2003 11:15 * 9/2/2003 13:30 9/10/2003 8:45 9/23/2003 10:30 9/23/2003 10:30 * 10/1/2003 9:45
10/7/2003 9:30 10/14/2003 9:45 10/22/2003 10:00 10/28/2003 12:30 10/28/2003 12:30 * 11/13/2003
10:45 11/26/2003 11:45 11/26/2003 11:45 * 12/11/2003 11:15 12/23/2003 9:00 12/23/2003 9:00 * *
Duplicate Sample (OC) Otter Point Creek Date Time collected 4/15/2003 13:30 4/23/2003 10:15
4/30/2003 10:45 5/8/2003 12:30 5/14/2003 9:30 5/21/2003 10:00 5/29/2003 9:45 6/4/2003 8:45
6/11/2003 8:45 6/18/2003 12:00 6/25/2003 9:15 7/2/2003 11:45 7/9/2003 10:45 7/16/2003 9:15
7/23/2003 9:45 7/30/2003 10:00 7/30/2003 10:00 * 8/6/2003 10:00 8/13/2003 10:30 8/20/2003 9:30
8/27/2003 12:15 8/27/2003 12:15 * 9/2/2003 11:00 ** 10/14/2003 9:00 10/21/2003 9:15 10/29/2003
10:15 10/29/2003 10:15 * 11/12/2003 11:20 11/25/2003 12:15 11/25/2003 12:15 * 12/9/2003 11:30
*** * Duplicate Sample **Station pulled for pier reconstruction from 9/2/03 - 10/14/03. ***Meter
pulled for ice and lack of depth. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Additional
Description: Entry verification Nutrient samples are sent to Nutrient Analytical Services
Laboratory (NASL) at the University of Maryland's Chesapeake Biological Laboratory. The samples
are analyzed and problems in sample quality are indicated with an Analytical Problem Code (APC).
Additionally, quality assurance/quality control (QA/QC) samples are analyzed and reviewed by
NASL to ensure their instrumentation and analytical procedures are not producing erroneous
results. Chlorophyll samples are sent to the Maryland Department of Health and Mental Hygiene
(DHMH) for analysis. Data from DHMH is handled and QA/QC'd following similar protocols to those
in place by NASL. The APC codes in use have been regionally accepted by all partners
participating in water quality monitoring of the Chesapeake Bay under guidance of the
Environmental Protection Agency's Chesapeake Bay Program Office (CBP). The nutrient data is sent
from NASL to the Maryland Department of Natural Resources' Tidewater Ecosystem Assessment
division where it is entered into our main water quality database and is merged with the time
and date matched field and chlorophyll data. Any APC codes associated with nutrient or
chlorophyll data that indicate the data should be rejected are hidden and made unavailable. Data
values that fall below CBP accepted Minimum Detection Limits (MDL) are hidden and a new value is
set at the MDL and is flagged to indicate the value has been set to MDL. Once the data has been
entered into the data management system, a series of reports and plots are generated for review
by an analyst (Chris Heyer). Automatic range checks flag and report any data values that exceed
the ranges. The analyst reviews the data and the range check reports to determine if the data
are acceptable based on conditions at adjacent stations, weather at the time of sampling, and
historic data. Data that are rejected during this QA/QC process are hidden. Once the data has
undergone with QA/QC check by the analyst it is made final and available to the scientific
community for use. This data is then sent to the DNR field office where a CBM NERR technician
(John Zimmerelli) conforms this data into the correct NERR format and variable comment codes.
This data is run through a final QA/QC check verifying missing data and calculated values, and
an explanation for these data points is provided. PROCESS DATE: 20060223
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 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 this
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 the general information link on the CDMO home page) and online at
the CDMO home page 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:
2006-02-23
Last DIF Revision Date:
2009-06-02
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