Great Bay Estuary (GRB) NERR Nutrient Metadata April 2004 through December 2004 Latest Update: Dec. 14, 2005Entry ID: CDMO_grbnut04-12.04m
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 Nutrient monitoring in GBNERR has been conducted to since the late 1980???s with basic goal of developing and maintaining temporally intensive long-term datasets of physio-chemical parameters of water quality at locations that are representative of the Great Bay Estuarine System. The Great Bay site is relatively unimpacted, while the three tidal river sites (Lamprey, Oyster and ... Squamscott) have large drainage basins and are impacted by both point (wastewater treatment plants) and nonpoint sources of pollution. In addition to establishing a baseline of water quality,and understanding the spatial and temporal variability of important indicators of estuarine water quality, the data is used by a number of researchers in the analysis of physical and biological processes. Monthly Grab Monthly grab samples are collected to quantify the horizontal spatial variability of important nutrients in the water column at sites located in the upper and lower estuarine representative of the local salinity and habitat gradients. Diel Sampling Program Once per month, samples are collected every two and one half hours through a 24-hour tidal cycle to quantify the temporal variability of important nutrients in the water column as a function of tidal dynamics.
Associated researchers and projects This project is one of several water quality monitoring programs in the Great Bay Estuary that include both physical and chemical properties. Other Remarks None
SPATIAL DATA ORGANIZATION INFORMATION:
Indirect Spatial Reference: Site location and character The Great Bay is a macro-tidal drowned river valley estuary located in northern New England. Seven major tributaries contribute runoff to Great Bay draining a total area of roughly 2,400 km2. Strong tidal and wind driven currents drive circulation patterns, vertical mixing, and resuspension of sediments, which in turn affect primary productivity. The estuary is contains five major habitat types in the form of mud flat, eelgrass meadows, salt marsh, channel bottom, and rocky shore. Four permanent stations are monitored as a part of this program. They are located in mid Great Bay, and in the Lamprey, Oyster and Squamscott Rivers. Site #1 Great Bay (GB) Location: Central area of Great Bay proper. Coordinates: 43○ 04' 20" N latitude and 70○ 52' 10" W longitude. Salinity range: 5-32 ppt (seasonally); 0-5ppt from high to low tide. Temperature range: -1○C to 24○C (seasonally); 0-3○C(from high to low tide Depth: 6.5 meters at MLW Tidal height: 2.7 meters Bottom type: Mud and rock channel bottom Tidal velocity: maximum 50 cm/sec Watersheds: Squamscott, Lamprey and Winnicut Rivers plus smaller streams. High tide influence from Little Bay and associated rivers Pollutant influence: clean reference site Deployment: The instrument is suspended between a mooring and a surface buoy at a depth of 1 meter below the surface. All files from 2004 were obtained from the sonde in unattended mode; the communications buoy being non-operational. Site #2 Squamscott River (SQ) Location: Mid channel of the Squamscott River at the Boston and Maine Railroad bridge, Stratham, NH. Coordinates: 43○ 02' 30" N latitude and 70○ 55' 20" W longitude Salinity range: 0-30ppt (seasonally); 5-20 ppt from high to low tide Temperature range: -1○C to 27○C (seasonally);difference of 0-5○ from high to low tide Depth: 3.5 meters at MLW Tidal height of 2.7 m Bottom type: Mud/oyster channel bottom Tidal velocity: maximum 50 cm/sec Watersheds: Exeter River, adjacent marshes Pollutant influence: Urban storm water, agriculture, two municipal wastewater treatment plants, residential septic systems Deployment: The sonde is deployed in a perforated PVC cylinder attached to a piling at a fixed 0.5m height above the bottom and connected to a YSI 1240 radio transmitter mounted on the piling. Site #3 Lamprey River (LR) Location: West bank of the tidal portion of the Lamprey River, approximately 300 m downstream of the dam at Route 108 in Newmarket, NH Coordinates: 43○ 04' 48" N latitude and 70○ 56' 04" W longitude Salinity range: 0 to 27 (seasonally); difference of up to 15 ppt between high and low tides Temperature range: -1○C to 27○ (seasonally); difference of 0-5○C between high and low tides Depth: 3.5 m Tidal height 2.7 m Bottom type: mud/rock Tidal velocity: maximum 40 cm/sec Watershed: Lamprey River Pollutant influence: Urban stormwater, adjacent marina, upstream and downstream wastewater treatment plants, upstream agriculture Deployment: The sonde is deployed in a perforated PVC cylinder attached to a piling at a fixed height of 0.5 m above the bottom connected to a Marisys cellular transmitter mounted on the piling. All files from this site in 2004 were obtained in the unattended mode. We were unable to establish communications with the Marisys unit. Site #4 Oyster River (OR) Location: in the center channel of the tidal portion of the Oyster River, approximately 300 m downstream of the head of tide dam adjacent to Jackson???s Landing in Durham, NH. Coordinates: (in Decimal Degrees) are 43.134 N latitude 70.911,43.134 W longitude Salinity range: 0 to 32 (seasonally); difference of up to 15 ppt between high and low tides Temperature range: -1○C to 27○C (seasonally); difference of up to 5○C between high and low tides Depth: 0.3 m at mlw, 3 m at highest high tides Tidal height 2.7 m (maximum) Bottom type: mud Tidal velocity: maximum 40 cm/sec Watershed: Oyster River Pollutant influence: urban stormwater, mooring field and crew dock, downstream wastewater treatment plant, upstream agriculture, residential on-site sewage disposal Deployment: Deployed horizontally in perforated PVC pipe with four weighted "legs" that keep the instrument approx. 1 meter above bottom. The Oyster River sonde is hard-wired to a radio telemetry station on shore (approximately 25 meters away).
Data Set Citation
Dataset Originator/Creator: Jonathan Pennock, Brian Smith, Jeremy Leclair, Jeff Merriam
Dataset Title: Great Bay Estuary (GRB) NERR Nutrient Metadata April 2004 through December 2004 Latest Update: Dec. 14, 2005
Dataset Release Date: 2006-02-23
Data Presentation Form: Unknown
Other Citation Details: NAOnline Resource: http://cdmo.baruch.sc.edu/
This description is a member of a collection. The collection is described in
Start Date: 2004-04-01Stop Date: 2004-12-31
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CHLOROPHYLL
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > PHOSPHOROUS COMPOUNDS
OCEANS > COASTAL PROCESSES > ESTUARIES
OCEANS > OCEAN CHEMISTRY > NITRATE
OCEANS > OCEAN CHEMISTRY > NITRITE
OCEANS > OCEAN CHEMISTRY > PHOSPHATE
BIOSPHERE > AQUATIC ECOSYSTEMS > ESTUARINE HABITAT
OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL
Quality ATTRIBUTE ACCURACY REPORT: Limits of Detection The following Method Detection Limits (MDL), the lowest concentration of a parameter that an analytical procedure can reliably detect, have been established for the UNH laboratory that performed analyses in 2004 (Table 1). Concentrations below the MDL are reported as -9999 in the database. Samples that fall above the maximum range of the chemistry are ... diluted so that the analysis falls within the analytical range of the chemistry and these values are multiplied by the dilution factor (e.g. 10 for a 1:10 dilution) and reported in the database. Table 1. University of New Hampshire Water Quality Analysis Laboratory Method Detection Limits (MDL) for measured water quality parameters. Parameter Variable Range: mg(N or P)/L MDL mg(N,P or SiO2 )/L Dates in use Ammonium NH4F 0 ??? 0.200 0.005 2004 Apr-Dec Nitrite NO2F 0 ??? 10.00 0.005 2004 Apr-Dec Nitrate NO23F 0 ??? 10.00 0.005 2004 Apr-Dec Orthophosphate PO4F 0 ??? 0.200 0.005 2004 Apr-Dec Silica SiO2 0-10.00 0.01 2004 Apr-Dec Chlorophyll a Chla 0-30.00 0.06 2004 Apr-Dec Pheaophytin Phea 0-30.00 0.06 2004 Apr-Dec The data report uses the convention outlined in the NERRS Nutrient and Chlorophyll Monitoring Program and Database Design SOP (Revised March 2004). Nutrient/Chla comment codes and definitions are provided in the following table. Missing data are denoted by a blank cell ??? ??? and comment 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 I, 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, if the measured concentration of NO23F was 0.0005 mg/l as N (MDL=0.008), 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 ???N???. If a calculated value is negative, the value is reported as a ???9999. 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 N Calculated value is Negative P Significant precipitation (reserve defined, see metadata for further details) U Lab analysis from unpreserved sample S Data suspect, see metadata for further details Notes: Values noted as above the upper limit of method detection (???A???) are rare as analytical dilutions performed to bring all samples below the upper limit of diction by the methods. Values noted as below the method detection limit (MDL, noted by a ???B???) are replaced by a value of -9999 in the data set. Calculated values (???C???) include NO3F (calculated as the difference between NO23F ??? NO2F) and DIN (calculated as the sum of NO23F + NH4F). Data denoted as deleted (???D???) have almost always been removed as a result of lack of confidence in the data resulting from poor replication or using the judgment of the PI that the sample had been contaminated or otherwise mis-handled in processing (typically if the values are 1-2 orders of magnitude above or below historical values. Data denoted as missing (???M???) were generally lost as a result of our inability to access a station as a result of acute weather events or safety concerns that occurred during a sampling effort (i.e. not an event that caused the rescheduling of an entire trip) or loss of sample resulting from sample handling problems during pre-processing in the laboratory. QA/QC Programs b) Precision i. Field Variability ??? GBNERR collects two successive grab samples for the determination of water mass variability. ii. Laboratory Variability ??? none iii. Inter-organizational splits ??? none c) Accuracy i. Sample Spikes ??? blanks ii. Standard Reference Material Analysis ??? see lab protocols iii. Cross Calibration Exercises - none LOGICAL CONSISTENCY REPORT: NACOMPLETENESS REPORT: Sampling in the Great Bay Estuary is typically limited to the months of April through November as a result of ice formation during the winter months. We were able to extend sampling by one month into December. For 2004, the first water samples for the SWMP nutrient monitoring program were collected April 6, 2004 and the last were collected on December 8, 2004.LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Additional Description: Entry verification All field and lab data were collected following protocols described in the project QAPP. Data were entered into an Excel Spreadsheet, verified by UNH laboratory technicians and/or the Principal Investigator and the ???nutrientRound.xls??? rounding macro provided by the CDMO was applied to the data. 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
DISTRIBUTION LIABILITY: 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
Distribution Format: Ascii File, Formatted For Text Attributes, Declared Format (ASCII)NA
Fees: Data is available at no charge.
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
New Hampshire Fish and Game Department
Province or State: NH
Postal Code: 03824
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2008-07-31
Last DIF Revision Date: 2008-08-25