MD DNR Continuous Water Quality Monitoring Project 2004
Metadata:
- Identification_Information: top
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- Citation:
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- Citation_Information:
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- Originator:
- Maryland Department of Natural Resources, Resource Assessment Service (MD DNR RAS)
- Publication_Date: 20050518
- Title: MD DNR Continuous Water Quality Monitoring Project 2004
- Geospatial_Data_Presentation_Form: Spatial dataset
- Description:
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- Abstract:
- Water quality at thirty-four Maryland shallow water sites located on Chesapeake Bay tributaries was monitored during 2004. YSI 6600 EDS data loggers sampled seven environmental parameters: water temperature, salinity, dissolved oxygen concentration, oxygen percent saturation, pH, turbidity, and fluorescence. Each parameter was sampled at 15-minute intervals. The number of days data were collected at individual stations ranged from 168 and 342.
Data loggers were exchanged bi-weekly.
When data loggers were exchanged, water samples for pigments, nutrients and suspended solids were collected for later analysis. Secchi disk depth was measured and HydroLab CTD casts were made at the same time.
- Purpose:
- The Maryland Department of Natural Resources Shallow Water Monitoring program is part of a cooperative effort between the Federal government and State and local governments in the Chesapeake Bay watershed to assess the ambient water quality criteria for dissolved oxygen, chlorophyll and water clarity in shallow water habitats.
Shallow water monitoring data describes the 2004 state of thirty-four shallow water sites on Chesapeake Bay tributaries using key water quality indicators.
The information is integrated with data from other Bay water quality stations and living resources monitoring projects and used to understand linkages, temporal variation and long-term trends.
Water quality data are used to refine, calibrate and validate Chesapeake Bay ecological models. The models are used to develop and assess water quality criteria with the goal of removing the Chesapeake Bay and its tidal rivers from the list of impaired waters.
- Supplemental_Information:
- The target audiences for this information include Resource Managers, Technical/Scientific Users, Government, Educators, Students and General Public.
Data users who desire very detailed information about Water Quality Monitoring data-definition, sampling-procedures and data-processing are encouraged to refer to the two documents listed below. The documents may be obtained from The Chesapeake Bay Program Office.
Water Quality Database - Database Design and Data Dictionary Prepared For: U.S. Environmental Protection Agency, Region III, Chesapeake Bay Program Office, January 2004. <http://www.chesapeakebay.net/pubs/cbwqdb2004_RB.PDF>
Quality Assurance Project Plan for the Maryland Department of Natural Resources Chesapeake Bay Shallow Water Monitoring Program for the period July 1, 2004 - June 30, 2005. <http://mddnr.chesapeakebay.net/eyesonthebay/swm_qapp_2004.pdf>
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 20040107
- Ending_Date: 20041231
- Currentness_Reference: Ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -79.4938
- East_Bounding_Coordinate: -75.0405
- North_Bounding_Coordinate: 39.7425
- South_Bounding_Coordinate: 37.8713
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus:
- Olsen, L.M., G. Major, S. Leicester, K. Shein, J. Scialdone, H. Weir, S. Ritz, C. Solomon, M. Holland, R. Bilodeau, T. Northcutt, R. Vogel. 2004. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. <http://gcmd.nasa.gov/Resources/valids/keyword_list.html>
- Theme_Keyword:
- EARTH SCIENCE > Biosphere > Aquatic Habitat > Estuarine Habitat
- Theme_Keyword:
- EARTH SCIENCE > Biosphere > Aquatic Habitat > Rivers/Stream Habitat
- Theme_Keyword:
- EARTH SCIENCE > Biosphere > Ecological Dynamics > Nutrient Cycling
- Theme_Keyword:
- EARTH SCIENCE > Biosphere > Ecological Dynamics > Primary Production
- Theme_Keyword: EARTH SCIENCE > Hydrosphere > Surface Water > Rivers/Streams
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Chlorophyll
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Conductivity
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Nitrogen Compounds
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Nutrients
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Oxygen
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > pH
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Phosphorous Compounds
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Suspended Solids
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Turbidity
- Theme_Keyword:
- EARTH SCIENCE > Hydrosphere > Water Quality/Water Chemistry > Water Temperature
- Place:
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- Place_Keyword_Thesaurus: Producer Defined
- Place_Keyword: United States
- Place_Keyword: Maryland
- Place_Keyword: Chesapeake Bay Watershed
- Place_Keyword: Chesapeake Bay
- Place_Keyword: Anne Arundel County
- Place_Keyword: Baltimore County
- Place_Keyword: Calvert County
- Place_Keyword: Charles County
- Place_Keyword: Dorchester County
- Place_Keyword: Harford County
- Place_Keyword: Howard County
- Place_Keyword: Prince George's County
- Place_Keyword: Queen Anne's County
- Place_Keyword: St. Mary's County
- Place_Keyword: Bush River
- Place_Keyword: Chester River
- Place_Keyword: Chicamicomico River
- Place_Keyword: Gunpowder River
- Place_Keyword: Middle River
- Place_Keyword: Patapsco River
- Place_Keyword: Patuxent River
- Place_Keyword: Potomac River
- Place_Keyword: Rhode River
- Place_Keyword: South River
- Place_Keyword: St. Mary's River
- Place_Keyword: Transquaking River
- Place_Keyword: West River
- Access_Constraints: None
- Use_Constraints: None
- Point_of_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Christopher Heyer
- Contact_Position: Project Leader
- Contact_Address:
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- Address_Type: Mailing Address
- Address: Tawes State Office Building, 580 Taylor Avenue, D2
- City: Annapolis
- State_or_Province: MD
- Postal_Code: 21401
- Contact_Voice_Telephone: 410 260-8630
- Contact_Electronic_Mail_Address:
- CHEYER_nospam_@dnr.state.md.us[Remove _nospam_ for valid email address]
- Browse_Graphic:
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- Browse_Graphic_File_Name: 2004cm_grab_stns.pdf
- Browse_Graphic_File_Description:
- Map of thirty-four 2004 Continuous Monitoring sites <http://www.chesapeakebay.net/comet_uploads/7579/2004cm_grab_stns.pdf>
- Browse_Graphic_File_Type: PDF
- Data_Set_Credit:
- Maryland Department of Natural Resources (MDDNR) Resource Assessment Service (RAS) staff collected the samples and processed the data. The Maryland Department of Mental Health and Mental Hygiene (DHMH) analyzed pigments and turbidity samples. The Nutrient Analytical Services Laboratory (NASL) at the Chesapeake Biological Laboratory (Univ. of MD) analyzed nutrient and suspended solids samples.
The project was made possible with funding provided by The State of Maryland, the United States Environmental Protection Agency Chesapeake Bay Program, the National Atmospheric and Oceanic Administration Chesapeake Bay Program Office, the National Atmospheric and Oceanic Administration National Estuarine Research Reserve System program, Harford County Maryland and Anne Arundel County Maryland.
- Data_Quality_Information: top
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
- Quality Assurance/Quality control. MD DNR followed specific procedures to ensure that the Shallow Water Quality Monitoring Program project design was properly implemented and managed with sufficient accuracy, precision and detection limits. Accuracy (closeness to the true value) of collected data was controlled and assured by the proper use, calibration and maintenance of both field and laboratory equipment for the measurement of physical and chemical parameters.
The YSI 6600 sondes were configured with the following probes: 6560, 6562, 6025, 6132, and either a 6026 turbidity probe or a 6136 turbidity probe. Resolution, range and accuracy specifications for the sonde and probes may be obtained from the manufacturer. <http://www.ysi.com/environmental-monitoring/data-acquisition.htm>
The procedures to control and assure the accuracy of field measurements involved the calibration of field instruments, the verification of calibrations, equipment maintenance, and collection of filter blanks. Most of the details of how data acquired with YSI sondes were quality assured and quality controlled are described in the process description elements in the Lineage portion of this metadata record. The results of the water quality attributes analyzed in the laboratories were also used to calibrate and crosscheck the sonde data for accuracy.
Daily quality control checks (including the running of blanks and standards) were used to control and assure laboratory accuracy.
Accuracy of laboratory results was also assessed through DNR's participation in the Chesapeake Bay Coordinated Split Sample Program (CSSP), a split sampling program in which five laboratories involved in Chesapeake Bay monitoring analyze the coordinated split samples. CSSP was established in June 1989 to establish a measure of comparability between sampling and analytical operations for water quality monitoring throughout the Chesapeake Bay and its tributaries. DNR followed the protocols in the Chesapeake Bay Coordinated Split Sample Program Implementation Guidelines (EPA 1991) and its revisions. Split samples were collected quarterly. Results were analyzed by appropriate statistical methods to determine if results differed significantly among labs. If a difference occurred, discussions began regarding techniques and potential methods changes to resolve discrepancies.
Additionally, CBL and DHMH participated two times per year in the United States Geologic Survey (USGS) reference sample program.
- Logical_Consistency_Report:
- Two of the attributes in the water quality data set are PARAMETER and VALUE. In cases where PARAMETER value is "SIGMA_T" and the VALUE measurement in the record is as negative number, the number should be considered unreliable.
- Completeness_Report:
- Data from 34 continuous monitoring stations are available on-line.
The 2004 project dataset includes twelve months of sonde records from the continuous monitoring sites named Iron Pot Landing and Jug Bay. The Mataponi and Otter Point Creek sites were sampled eleven months. The sites at Bishopville Prong and Turville Creek sites were sampled ten months. Chesapeake Biological Laboratory and Pin Oak sites were sampled nine months. The following locations were sampled during eight months: Aberdeen Proving Ground, Cutter Marina, Deep Landing, Fort McHenry, Lauderick Creek, Mariners Point Park, Mattawoman Creek, Piscataway Creek, Rolph's Wharf, SERC, Shady Side, and Strawberry Point. The Beards Creek, Benedict, Bestpitch, Elliot Island, Fenwick, Hambleton Point, Kent Point, Kings Landing, Piney Point, Sage Point, Sandy Point East Beach, and Sandy Point South Beach sites were sampled seven months. The sites at Harness Creek (Downstream Station) and Harness Creek (Upstream Station) were sampled for six months.
The user may discover a few interruptions in sonde datasets. In most cases, these interruptions were related to short-term problems with sonde operation.
Due to ice concerns, sondes deployed at the Iron Pot Landing, Jug Bay were removed between 22 January and 10 February, 2004. The sonde at Mataponi was removed 22 January and re-deployed 24 February, 2004.
On a few occasions, due to extreme low tide conditions, sondes were not submerged. These data are not included in the published dataset.
All other missing attribute values were removed because the data were determined to be unreliable during the quality control process.
- Lineage:
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- Process_Step:
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- Process_Description:
- SONDE CALIBRATION and POST-CALIBRATION
The Yellow Springs Instrument (YSI) 6600 data sondes were maintained and calibrated before and after each deployment in accordance with YSI recommendations. <http://www.ysi.com/environmental-monitoring/data-acquisition.htm>
FIELD MEASUREMENTS AND SAMPLING
The continuous monitoring sensors at the site recorded seven water quality parameters every 15 minutes. Data were uploaded to DNR's web site <http://www.eyesonthebay.net> shortly after retrieval.
The seven water quality parameters measured continuously were water temperature, specific conductance, salinity, dissolved oxygen, turbidity (NTU), fluorescence (used to estimate chlorophyll a) and pH. Sondes were located at a constant depth of one meter below the surface of the water for most stations, although some stations were fixed at 0.3 m or 0.5 m above the bottom.
The monitoring station was equipped with a YSI 6600 sonde. The sonde logged data onto an internal memory, where it was stored until retrieval. Fifteen stations were equipped with cellular telemetry units, which allowed data to be transmitted hourly to a server computer at DNR. Sondes were deployed inside of four-inch diameter PVC pipes with several two-inch holes drilled along their length to allow for water exchange. Depending on location, sondes were either suspended from a float (1.0 m below surface) or fixed (0.3 m above bottom) resting on stop bolt.
WATER QUALITY CALIBRATION SAMPLES:
Each time sondes were exchanged at each Continuous Monitoring station, "Grab" water quality samples were collected at meter depth using a horizontal "Alpha" water sampler. A meter depth HydroLab sonde measurement was taken at the time the water was collected.
Numbered two quart bottles were triple-rinsed and filled with water for "whole" and "filtered" nutrient and chlorophyll samples. A labeled sixteen-ounce bottle was triple-rinsed and filled with water for turbidity analysis.
Nutrient, pigment and suspended-solid water-samples were filtered on station or shortly thereafter. Sample waters and filters were placed on ice immediately after filtration.
Particulate samples included: Chlorophyll, Particulate Carbon, Particulate Nitrogen, Particulate Phosphorus (PP), Particulate Inorganic Phosphorous (PIP), Total Suspended Solids (TSS) and Volatile Suspended Solids (VSS).
Filtrate collected from TSS/VSS or PP/PIP filtrations was used for dissolved nutrient samples. Total Dissolved Nitrogen and Total Dissolved Phosphorus, Nitrate, Nitrite, Ammonia, Orthophosphate, Silicate and Dissolved Organic Carbon samples were collected.
HYDROLAB PROFILE:
The first reading of the HydroLab water-column profile at each station was recorded at the same time the water quality "grab" sample was collected. After the meter depth record was logged, the sonde was lowered to the bottom. A reading was taken at 0.3-meters above the bottom. The sonde was raised and measurements were recorded at 0.5-meter or 1.0-meter increments until it reached the surface. (In cases where station depth was greater then 3-meters, the sonde was raised in 1-meter increments).
SECCHI DEPTH:
Secchi Disk Depth was measured each time sondes were exchanged. Readings with the secchi disk were made in-situ without the aid of sunglasses. The secchi disk was lowered into the water and the depth at which it is no longer visible is recorded. The time at which the reading was taken was noted. This facilitated later matching of secchi depth readings with transmissometer and turbidity data.
PAR MEASUREMENT:
Underwater Photosynthetically Active Radiation (PAR, 400-700nm)
When meters were exchanged at a site, down-welling light penetrating the water column (PAR) was measured underwater at several depths to calculate the light attenuation coefficient, Kd. Simultaneous surface and submersed PAR intensity measurements were taken to account for variability in incident surface irradiance due to changes in cloud cover. Data collected from this procedure was used to estimate the depth of the photic zone.
The equipment used was manufactured by LI-COR, Inc. and consisted of a LI-192SA, flat cosine Underwater Quantum Sensor, a LI-190SA air (deck) reference sensor and a Data Logger (LI-1000 or LI-1400).
Surface and underwater readings were recorded simultaneously. Readings were allowed to stabilize before being recorded. If the station depth was less than 3 meters, readings were taken at 0.1 meter and at 0.25-meter intervals until 10% for the 0.1-meter reading was reached. If the station depth was greater than 3 meters, a reading was taken at 0.1-meter and at 0.5-meter intervals until 10% of the 0.1-meter reading was reached.
SONDE DATA CHECKS
The continuous monitoring sondes were retrieved, calibrated and replaced weekly from to January to December. At each deployment, sondes were replaced with clean, recalibrated units and data from the data loggers were downloaded to a computer.
In the field, before an instrument was replaced, field staff allowed both the new (freshly calibrated) sonde and the old (deployed) sonde to log 2 readings (15 minutes apart) side by side at the same depth. In addition, for one of the readings, data were recorded from a discrete instrument -usually a HydroLab sonde. This three-way comparison assured that the "new" and "old" sondes were both reading each parameter within a certain tolerance. The HydroLab reading was used as a "double-check," and since it is a discrete reading, it allowed staff to watch the display and note whether the parameters were fluctuating or stable.
EcoWatch software (a YSI product) was used to calibrate the instruments as well as to upload and view data collected. Data downloaded from the sonde were subjected to quality assurance/quality control checks to ensure that values outside the range of possibility were not displayed on the DNR web site.
Data were evaluated using both three-way in-situ comparison results and data from sonde calibrations. The comparison tolerances were as follows - for both pre- post- calibration and in-situ comparisons: Temperature (deg C) +- 0.2; Specific Conductance (uM/cm) +- 5%; Dissolved Oxygen (mg/l) +- 0.5 mg/l; pH +- 0.2; Turbidity (NTU) +- 5%; Chlor +- 5%.
Excessive drift between pre- and post- calibration values of sonde probes, variance from in situ measurements or probe failures caused data to be flagged. When post-calibration drift exceeded the limits stated above in both the post-calibration and the in-situ comparables, the "bad data" were masked within the data set with an error code (see QAPP or list).
SONDE FILE POST-PROCESSING:
Each "raw" .csv file of sonde data was post-processed using an Excel Macro. The file was opened and renamed. Rows of data acquired before and after deployment were deleted. Records (if any) were also deleted if instrument error codes indicated "garbage" data. The macro rearranged columns and inserted error-tracking columns and headings. Macro instructions flagged negative values, missing values and highlighted values outside each parameter's normal range. The macro also returned a report summarizing exceedences. Event and instrument information was appended to each record.
Flagged values were evaluated. Common anomalies included spikes in fluorescence and turbidity, dips in specific conductance, extremely high dissolved oxygen readings. Instrument post-calibration results, in situ comparisons with HydroLab, LI-COR readings, historical data from near-by locations and, survey crew remarks were used to determine whether sensor values were acceptable.
In cases where data were determined to be unreliable, the reason(s) values were determined to be unacceptable were documented with error codes and comments. Unreliable data were masked. No data were discarded. Only data considered reliable were published in reports.
Field staff and Tawes Office staff reviewed continuous monitoring data weekly. If a problem was identified, a field team member was dispatched to replace the instrument as soon as possible.
VERIFICATION AND DATA MANAGEMENT
At the end of the monitoring season, DNR Tawes Office and Field Office personnel conducted additional data QA/QC procedures. All of the data were plotted and outliers and anomalous values were thoroughly researched. Staff compared unusual values to historic values from the site and values from nearby sites in the Bay. Weather events were considered, event logs were reviewed and field staff were consulted regarding possible legitimate causes for the values. In cases where values were not legitimate, they were masked within the published dataset with an error code and the approval of the field staff and the Quality Assurance Officer.
- Process_Date: Unknown
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Sally Bowen
- Contact_Position: Project Chief, Monitoring Field Office, DNR
- Contact_Address:
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- Address_Type: mailing and physical
- Address: 1919 Lincoln Drive
- City: Annapolis
- State_or_Province: Maryland
- Postal_Code: 21401
- Country: USA
- Contact_Voice_Telephone: 410 263-3369
- Contact_Electronic_Mail_Address:
- SBOWEN_nospam_@dnr.state.md.us[Remove _nospam_ for valid email address]
- Process_Step:
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- Process_Description:
- Laboratory analysis -MD DHMH. Active chlorophyll a and turbidity samples were analyzed by Maryland Department of Health and Mental Hygiene's (DHMH) Environmental Chemistry Division.
Further information about laboratory analytical procedures may be obtained from the "Process_Contact".
- Process_Date: Unknown
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Asoka Katumuluwa
- Contact_Position:
- Chief, Division of Environmental Chemistry, Laboratory Administration, Maryland Department of Health and Mental Hygiene
- Contact_Address:
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- Address_Type: mailing and physical
- Address:
- Department of Health and Mental Hygiene, 201 West Preston Street
- City: Baltimore
- State_or_Province: Maryland
- Postal_Code: 21201
- Country: USA
- Contact_Voice_Telephone: 410 767-5839
- Contact_Electronic_Mail_Address:
- KatumuluwaA_nospam_@dhmh.state.md.us[Remove _nospam_ for valid email address]
- Process_Step:
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- Process_Description:
- Laboratory analysis -CBL University of Maryland's Chesapeake Biological Laboratory (CBL), Nutrient Analytical Services Laboratory analyzed total dissolved nitrogen, particulate nitrogen, nitrite, nitrite + nitrate, ammonium, total dissolved phosphorus, particulate phosphorus, particulate inorganic phosphorus, orthophosphate, dissolved organic carbon, particulate carbon, silicic acid, total suspended solids, and volatile suspended solids.
Further information about laboratory analytical procedures may be obtained from the "Process_Contact".
- Process_Date: Unknown
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Carl Zimmerman
- Contact_Address:
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- Address_Type: mailing and physical
- Address:
- Chesapeake Biological Laboratory, Center for Environmental and Estuarine Studies, The University of Maryland System, 1 Williams St; P.O. Box 38
- City: Solomons
- State_or_Province: Maryland
- Postal_Code: 20688
- Country: USA
- Contact_Voice_Telephone: 410 326-7252
- Contact_Electronic_Mail_Address:
- carlz _nospam_@cbl.umces.edu[Remove _nospam_ for valid email address]
- Spatial_Data_Organization_Information: top
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- Indirect_Spatial_Reference:
- Bush River, Chesapeake Bay, Chester River, Chicamicomico River, Eastern Bay, Fishing Bay, Gunpowder River, Middle River, Patapsco River, Patuxent River, Potomac River, Rhode River, South River, St. Mary's River, Transquaking River, West River, Maryland, USA
- Direct_Spatial_Reference_Method: Point
- Spatial_Reference_Information: top
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- Horizontal_Coordinate_System_Definition:
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- Geographic:
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- Latitude_Resolution: 0.0001
- Longitude_Resolution: 0.0001
- Geographic_Coordinate_Units: Decimal degrees
- Geodetic_Model:
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- Horizontal_Datum_Name: North American Datum of 1983
- Ellipsoid_Name: Geodetic Reference System 80
- Semi-major_Axis: 6378137
- Denominator_of_Flattening_Ratio: 298.257
- Entity_and_Attribute_Information: top
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- Overview_Description:
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- Entity_and_Attribute_Overview:
- This metadata record is a description of a continuous monitoring project. Project data are an aggregation of data collected at thirty-four Maryland stations during 2004.
The data are contained in four related entities (tables): Station_Information, Monitoring_Event_Data, Water_Quality_Data and CMON_DATA. Each table contains attributes (fields).
The entity Station_Information is comprised of the attributes: STATION, DESCRIPTION, WATER_BODY, CBP_BASIN, TS_BASIN, BASIN, CBSEG_1985, CBSEG_1998, CBSEG_1998_DESCRIPTION, HUC8, CATALOGING_UNIT_DESCRIPTION, HUC11, WATERSHED, FIPS, STATE, COUNTY/CITY, FALL_LINE, LATITUDE, LONGITUDE, LL_DATUM, UTM_X, and UTM_Y.
The entity Monitoring_Event_Data is comprised of the attributes: EVENT_ID, SOURCE, AGENCY, PROGRAM, PROJECT, STATION, EVENT_START_DATE, EVENT_START_TIME, CRUISE, TOTAL_DEPTH, UPPER_PYCNOCLINE, LOWER_PYCNOCLINE, AIR_TEMP, WIND_SPEED, WIND_DIRECTION, PRECIP_TYPE, TIDE_STAGE, WAVE_HEIGHT, CLOUD_COVER, GAGE_HEIGHT, PRESSURE, FLOW_STAGE, and DETAILS.
The entity Water_Quality_Data is comprised of the attributes: EVENT_ID, SOURCE, PROJECT, STATION, SAMPLE_DATE, SAMPLE_TIME, DEPTH, LAYER, SAMPLE_TYPE, SAMPLE_ID, PARAMETER, QUALIFIER, VALUE, UNIT, METHOD, LAB, PROBLEM, DETAILS, TOTAL_DEPTH, UPPER_PYCNOCLINE, LOWER_PYCNOCLINE, LAT, and LONG values.
The entity CMON_DATA is comprised of the attributes: Dissolved Oxygen, percent Oxygen Saturation, Salinity, Temperature, pH, Turbidity and Chlorophyll.
- Entity_and_Attribute_Detail_Citation:
- Water Quality Database - Database Design and Data Dictionary Prepared For: U.S. Environmental Protection Agency, Region III, Chesapeake Bay Program Office, January 2004. <http://www.chesapeakebay.net/pubs/cbwqdb2004_RB.PDF>
Quality Assurance Project Plan for the Maryland Department of Natural Resources Chesapeake Bay Shallow Water Monitoring Program for the period July 1, 2004 - June 30, 2005. <http://mddnr.chesapeakebay.net/eyesonthebay/swm_qapp_2004.pdf>
- Distribution_Information: top
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- Distributor:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Ricky Bahner
- Contact_Position: Water Quality Database Manager
- Contact_Address:
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- Address_Type: mailing
- Address: 410 Severn Avenue, Suite 109
- City: Annapolis
- State_or_Province: Maryland
- Postal_Code: 71403
- Contact_Voice_Telephone: 410 267-5742
- Contact_Electronic_Mail_Address:
- rbahner_nospam_@chesapeakebay.net [Remove _nospam_ for valid email address
- Resource_Description: Downloadable data
- Distribution_Liability:
- None of the Chesapeake Bay Program partners nor any of their employees, contractors, or subcontractors make any warranty, expressed or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or data contained within the web site. Reference to any specific commercial products, processes, or services or the use of any trade, firm, or corporation name is for the information and convenience of the public and does not constitute endorsement, recommendation or favoring by the Chesapeake Bay Program partners.
- Standard_Order_Process:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: ASCII file, formatted for text attributes, declared format
- Format_Information_Content:
- Station Information, Monitoring Event data and Water Quality data
- File_Decompression_Technique: No compression applied
- Transfer_Size: 0.4
- Digital_Transfer_Option:
-
- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name: <http://www.chesapeakebay.net/wquality.htm>
- Access_Instructions:
- Station Information, Monitoring Event Data, and Water Quality Data are available though the Chesapeake Bay Programs CIMS data hub. Select Water Quality Database (1984-Present). Access the data by following web site (see network resource name) instructions.
- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: ASCII file, formatted for text attributes, declared format
- Format_Information_Content: Continuous monitoring sonde data
- File_Decompression_Technique: No compression applied
- Transfer_Size: 64.5
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name:
- <http://mddnr.chesapeakebay.net/newmontech/contmon/archived_results2.cfm?year=2004>
- Access_Instructions:
- CMON data (sonde data) are available through the Continuous Monitoring - Archived Results page of Eyes on the Bay website. Access sonde data by following web site (see network resource name) instructions. Select station and specify dates. Station record set counts range from 32,688 to 16,033. Depending on connection speed, downloads may take a very long time. Downloading partial record sets will proceed more quickly.
- Fees: None
- Metadata_Reference_Information: top
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- Metadata_Date: 20050815
- Metadata_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Ben Cole
- Contact_Address:
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- Address_Type: Mailing and physical address
- Address: Maryland Department of Natural Resources, D-2
- City: Annapolis
- State_or_Province: MD
- Postal_Code: 21401
- Contact_Voice_Telephone: (410) 260-8630
- Contact_Electronic_Mail_Address:
- bcole_nospam_@dnr.state.md.us[Remove _nospam_ for valid email address]
- Metadata_Standard_Name: Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.8.22 on Fri Jan 19 13:31:44 2007
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