Virginia Shallow Water Monitoring Program - Continuous Monitoring

Metadata:


Spatial Data Set Title:
Shallow Water Monitoring Program – Continuous Monitoring

Abstract:
This monitoring project consists of 18 CBP segments (YRKPH, YRKMH, PMKOH, PMKTF, JMSPH, JMSMH, JMSOH, JMSTF1, JMSTF2, CHKOH, APPTF, RPPMH, RPPOH, RPPTF, CRRMH, POTMH, POTOH) which are monitored continuously using YSI 6600 (or YSI 6000) data sondes, which record water quality parameters once every 15 minutes over a one to two week deployment at which time they are replaced to maintain the continuity of the data set.  There are a total of 22 stations; two in YRKPH, two in YRKMH, two in the RPPMH, three in the POTMH, and one each in the PMKOH, PMKTF, JMSPH, JMSMH, JMSOH, JMSTF1, JMSTF2, CHKOH, APPTF, RPPOH, RPPTF, CRRMH, and POTOH segments. 

Purpose:
Monitoring water quality within Chesapeake Bay Tributaries.

Originator:
VIMS - College of W&M

Time Span:
01 Jan – 31 Dec, 2007

Progress:
Complete

Maintenance/Update Frequency:
As Needed

Access Constraints:
Not Applicable

Use Constraints:
Not Applicable

Subject Keywords:
Monitoring, Nutrients, Salinity, Tributaries, Water, Water Quality, Turbidity, Chlorophyll, Fluorescence, DO Profiles
                                                 
Place Keywords:
York River, Pamunkey River, James River, Appomattox River, Chickahominy River, Rappahannock River, Corrotoman River, Lower Potomac River, Nomini River, Coan River, Yeocomico River, Lower Machodoc River, Mattox Creek, Rosier Creek, and Upper Machodoc Creek, Virginia (VA), USA

Bounding Box:
W -77.453170 E -76.009450 N 38.343600 S 36.851380

Distribution Contact:
Joy Austin
Laboratory Manager
VIMS - College of W&M
PO Box 1346
Rt 1208 Greate Rd
Gloucester Point, VA 23062
804-684-7307

Distribution Liability:
The user of this database should carefully review all pertinent documentation.  All water quality data are submitted or translated to the format described in the Water Quality Database Design and Data Dictionary.

Target Audience:
Scientists

Geographic Description:
York River, Pamunkey River, James River, Appomattox River, Chickahominy River, Rappahannock River, Corrotoman River, Lower Potomac River, Nomini River, Coan River, Yeocomico River, Lower Machodoc River, Mattox Creek, Rosier Creek, and Upper Machodoc Creek, Virginia (VA), USA

Attribute Accuracy Report:
All data generated by the laboratory is subjected to QA/QC protocol and peer review.  Instrument maintenance is performed and recorded in instrument manuals.
 
Laboratory QC: Sensor specifications, range of measurements, units, resolution, and
accuracy:

YSI 6000/6600 datalogger

Variable      Range of Measurements          Resolution           Accuracy
Date          1-12, 1-31, 00-99 (Mo,Day,Yr)  1 mo, 1 day, 1 yr    NA
Time          0-24, 0-60, 0-60 (Hr,Min,Sec)   1 hr, 1 min, 1 s        NA
Temp         -5 to 45 (c)                                   0.01  C                   +/-0.15C
Sp COND   0-100(mS/cm)                            0.01mS/cm            +/-0.5% Of
                                                                                             reading + 0.001mS/Cm
Salinity      0-70 Parts per thousand (ppt)      0.01 ppt              +/- 1% of Reading or 0.1
                                                                                               ppt, (whichever is greater)
DO            0-200 (% air saturation)              0.1% @air sat        +/-2% @air Saturation
DO            200-500 (% air saturation           0.1% @ air sat       +/- 6% @ Saturation
DO            0-20 (mg/l)                                  0.01 mg/l               +/- 0.2mg/l
DO            20-50 (mg/l)                                0.01 mg/l               +/- 0.6mg/l
Depth (shallow)    0-9.1 (m)                         0.001m                  +/- 0.018m
PH              2-14 units                                   0.01 units              +/- 0.2units
Turb           0-1000 NTU                               0.1 NTU               +/- 5% of
                                                                        Reading or 2 NTU (whichever is greater)

Logical Consistency Report:
None

Completeness Report:
All deployment schedules were adhered to.  Any other gaps in the data, due to sonde or probe malfunction are noted in the PROBLEM column, where available, or in the COMMENTS column if it is not. 

Horizontal and Vertical Accuracy Report:

A WAAS enabled Garmin GPSMAP 168 using NAD83 was used to determine position in associated with each station location.  During 2004, Trimble Surveying Equipment was used to determine a more accurate set of coordinates for each of the stations.  The following table was taken from Appendix D of the Quality Assurance Project Plan for Shallow Water Monitoring For the Period: April 1, 2004 through April 1, 2005 and lists all the coordinates.


Station

2003 QAPP

 

Garmin GPSMap 168

 

Trimble Survery

 

 

Latitude

Longitude

Latitude

Longitude

Latitude

Longitude

Gloucester Point

37.24889

76.49528

37.24828

76.49652

37.24840

76.49670

Yorktown

37.24432

76.52430

37.24432

76.52430

37.24424

76.52466

Clay Bank

37.34767

76.61042

37.34708

76.61165

37.34855

76.61123

Taskinas Creek

37.41525

76.71439

37.41742

76.70888

37.41497

76.71441

Muddy Point

37.57139

76.79119

37.57552

76.79768

37.57550

76.79756

Walkerton

37.72294

77.02536

37.72288

77.01958

37.72297

77.02029

Sweethall Marsh

37.57136

76.88411

37.57128

76.88405

37.57138

76.88424

White House

37.58014

77.02097

37.57678

77.02345

-

-

 

Process Description:
For Continuous Monitoring water quality parameters WTEMP, SPCOND, SALINITY, PH, DO_SAT, DO, TURB_NTU, FLUOR, TCHL, and DEPTH a YSI 6600 or YSI 6000 sonde unit was used.  For LATITUDE and LONGITUDE, a Garmin GPSMAP 168 WAAS enabled GPS unit is used.  The methods are found in the METHOD column, which corresponds to a method code. The data were uploaded to a PC from either YSI 6000 or 6600 dataloggers and reviewed using PC6000/6600 software from YSI.  Graphs were produced and examined using the PC6000/6600 software then printed out and filed.  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).  Macros supplied by NERRS/CDMO and MD DNR were used to help with editing, formatting and identifying outliers in the database.  Outliers were determined according to the instruments' manufacturers manual. Suspect data (as in data believed to result from a damaged or biofouled probe) were evaluated according to internal protocols and tagged accordingly in the PROBLEMS column associated with that parameter. 

The methods used are as follows:

PARAMETER: CHLA and FLUOR
CBP METHOD: F01
EPA METHOD AND OTHER DESCRIPTION: In-situ measurement of in-vivo chlorophyll using a probe attached to a multi-parameter sonde.  The instrument induces chlorophyll to fluorescence by shining a beam of light and then measuring the higher wavelength light which is emitted as a result of the fluorescence process.  The output is processed via the sonde software providing readings in UG/L. 
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual.  Revision A.  May 1999.  YSI, Inc.; Yellow Spring: Oh: 264p.

PARAMETER NAME: SPCOND, conductivity, in-situ specific conductance at 25 C
CBP METHOD:  F01
EPA METHOD OR OTHER DESCRIPTION: A calibrated conductivity sensor attached to a multi-probe sonde is lowered into a water body and allowed to stabilize prior to taking the meter reading. 
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual.  Revision A.  May 1999.  YSI, Inc.; Yellow Spring: Oh: 264p.

PARAMETER NAME: DO
CBP METHOD: F01
EPA METHOD OR OTHER DESCRIPTION:  306.1 In-situ Membrane Electrode. A calibrated dissolved oxygen sensor attached to a multi-probe sonde is lowered into a water body and allowed to stabilize prior to taking the meter reading. 
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual.  Revision A.  May 1999.  YSI, Inc.; Yellow Spring: Oh: 264p.

PARAMETER NAME: DO_SAT
CBP METHOD: F01 306
EPA METHOD OR OTHER DESCRIPTION: In-situ Membrane Electrode. A calibrated dissolved oxygen sensor attached to a multi-probe sonde is lowered into a water body and allowed to stabilize prior to taking the meter reading.  DO relative to the theoretical value at saturation (%) is then recorded.
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual.  Revision A.  May 1999.  YSI, Inc.; Yellow Spring: Oh: 264p.

PARAMETER NAME: PH, in-situ electrode method
CBP METHOD: F01
EPA METHOD OR OTHER DESCRIPTION:  150.1, A calibrated pH electrode, (corrects for temperature) attached to a multi-probe sonde, is lowered into a water body and allowed to stabilize prior to taking the meter reading.
REFERENCE: EPA, 1983. USEPA-600/4-79-020. Method 150.1.

PARAMETER NAME: SALINITY, in-situ measurement
CBP METHOD:  L01
EPA METHOD OR OTHER DESCRIPTION:  A calibrated conductivity sensor, which corrects for temperature, is attached to a multi-probe sonde which is lowered into a water body and allowed to stabilize prior to taking the meter reading.  The instrument then converts conductivity to temperature. 
REFERENCE: YSI 6-Series Environmental Monitoring Systems Manual.  Revision A.  May 1999.  YSI, Inc.; Yellow Spring: Oh: 264p.
                          
PARAMETER NAME: TURB_NTU, turbidity, nephelometric method
CBP METHOD: L01
EPA METHOD OR OTHER DESCRIPTION:  180.1  A nephelometric sensoris attached to a multi-probe sonde which is lowered into a water body and allowed to stabilize prior to taking the meter reading
REFERENCE: EPA, 1993. EPA/600/R93/100, Method 180.1, Rev 2.
                
PARAMETER NAME:  WTEMP, water temperature, in-situ
CBP METHOD:  F01
EPA METHOD OR OTHER DESCRIPTION:  170.1
REFERENCE:  EPA, 1983.  USEPA-600/4-79-020. Method 170.1

 

Entity and Attribute Overview:
In the database there is a WQ_DATA, WQ_DATA_BMDL, WQ_STATIONS WQ_PROFILES and WQ_EVENT table as well as a dataset from each of the 22 stations that were maintained in 2007. 

 

Entity and Attribute Detail Citation:
WQ_STATIONS table contains station name, location and detailed information.  The WQ_EVENT table contains weather data for the stations.    The WQ_DATA table contains physiochemical profile data and nutrient data.  The WQ_DATA_BMDL table contains the actual instrument values obtained for samples below the method detection.  The WQ_PROFILES table contains profiles of DO, pH, Salinity, Specific Conductivity, and Temperature for each station each time the YSIs were switched out.                                     

Direct Spatial reference Method:
Point

Latitude Resolution:
.00001

Longitude Resolution:
.00001

Geographic Coordinate Units:
Decimal Degrees

Horizontal Datum Name:
NAD 83

Semi-major Axis:
6378137

Denominator of Flattening Ratio:
298.257