Abstract:
Water quality monitoring is conducted at 26 National Estuarine Research Reserves (NERR) at four locations within or adjacent to the reserve. The following parameters are collected at least every 30 minutes: water temperature, specific conductivity, salinity, percent saturation, dissolved oxygen concentration, water depth, pH and turbidity. All water quality data loggers will be deployed from a known depth from the bottom at each site.
Purpose:
The purpose of the monitoring program at CBM NERR is to conform to the NERR SWMP monitoring program looking at trends in water quality over both temporal and spatial scales. Differences in how marshes can change water quality is being studied by comparing a marsh creek site to a river channel site. Measurements are taken every 30 minutes over a 5-14 ... day period at both the Patuxent River Park (PR) and Jug Bay Wetlands Sanctuary (JB) sites.
SUPPLEMENTAL INFORMATION: Associated researchers and projects The Jug Bay Wetlands Sanctuary staff have been collecting weekly to monthly temperature, salinity, dissolved oxygen, and nutrient samples at the same location as the data logger at JBWS. In addition a graduate student has measured denitrification rates while another student has compared dissolved oxygen measurements using various techniques at the JBWS site. Other remarks/notes
CURRENTNESS REFERENCE: Observed
SPATIAL DATA ORGANIZATION INFORMATION: Indirect Spatial Reference: Site location and character The Chesapeake Bay NERR - Maryland has three components in Maryland's portion of the Chesapeake Bay. Monie Bay is a mesohaline region on the lower Eastern Shore; Otter Point Creek is a tidal freshwater river and marsh system; and Jug Bay is part of the freshwater portion of the Patuxent River. Both data loggers are within the Jug Bay component. 1) Patuxent River Park (PRP) - (38 deg 46; 00; N, 76 deg 42; 30; W) is on the Prince Goerges County side of the River. The data logger is on the flank of the River channel off of Jackson Landing. The Patuxent is approximately 50 meters wide at Jackson Landing. High sedimentation rates have led to a very soft bottom at this point in the Patuxent River. Salinity rarely reaches above 1 ppt. 2) Jug Bay Wetlands Sanctuary (JBWS) - (38 deg 46; 00; N, 76 deg 42; 30; W) is on the Anne Arundal County side of the River directly across from PRP. The data logger is in a shallow tidal marsh creek that is approximately 5 meters wide. Wide temperature fluctuations are normal at this site.
Quality
ATTRIBUTE ACCURACY REPORT: Anomalous/Suspect Data Suspect data from any one measurement and data collected at the same time are removed and replaced with a period (.). April 1996 PR: High DO spike due to redeployment on 4/19/96 12:00 May 1996 PR: High DO spike due to redeployment on 5/10/96 14:00 JB: Negative depth data was recorded ... during the following times: Date Time Depth 05/11/96 19:30:00 -0.01 05/11/96 20:00:00 -0.03 05/11/96 20:30:00 -0.04 05/12/96 06:30:00 -0.01 05/12/96 07:00:00 -0.01 05/12/96 07:30:00 -0.01 05/12/96 08:00:00 -0.02 05/12/96 08:30:00 -0.02 05/12/96 09:00:00 -0.01 05/12/96 09:30:00 -0.01 05/12/96 10:00:00 -0.01 05/12/96 10:30:00 -0.01 05/12/96 15:00:00 -0.01 05/12/96 15:30:00 -0.02 05/12/96 16:00:00 -0.02 05/12/96 16:30:00 -0.02 05/12/96 17:00:00 -0.02 05/12/96 17:30:00 -0.02 05/12/96 18:00:00 -0.02 05/12/96 18:30:00 -0.01 05/12/96 19:00:00 -0.01 pH probe failed 5/16/96 15:00:00 to 5/30/96 15:00:00. June 1996 PR: pH probe failed 6/20/96 15:00:00 to 6/22/96 07:30:00. pH probe failed 6/27/96 14:30:00 to 6/30/96 23:30:00. JB: Negative depth data was recorded during the following times: Date Time Depth 06/12/96 20:30:00 -0.01 06/12/96 21:00:00 -0.01 06/12/96 21:30:00 -0.02 06/12/96 22:00:00 -0.02 pH probe failed 6/10/96 13:00:00 to 6/20/96 13:30:00. July 1996 PR: pH probe failed 7/1/96 00:00:00 to 7/10/96 16:30:00. D.O. data removed due to negative values 7/10/96 17:30:00 to 7/25/96 12:30:00. D.O. data removed due to negative values 7/25/96 15:30:00 to 7/26/96 21:00:00. D.O. data removed due to negative values 7/27/96 04:30:00 to 7/27/96 21:00:00. D.O. data removed due to negative values 7/28/96 06:30:00 to 7/28/96 11:30:00. D.O. data removed due to negative values 7/29/96 07:00:00 to 7/29/96 11:30:00, 23:00:00. D.O. data removed due to negative values 7/30/96 09:30:00 to 7/30/96 13:00:00. D.O. data removed due to negative values 7/30/96 22:30:00 to 7/31/96 02:00:00. D.O. data removed due to negative values 7/31/96 11:30:00. D.O. data removed due to negative values 7/31/96 22:00:00 to 7/31/96 23:30:00. JB: pH probe failed 7/15/96 09:30:00 to 7/25/96 14:00:00 August 1996 PR: Negative DO data removed 8/1/96 00:00-8/2/96 16:00. Negative DO removed 8/22/96 02:00. pH probe failed 8/28/96 17:00:00 to 8/31/96 23:30:00. JB: D.O. data removed due to possible membrane puncture from 8/5/96 09:30:00 to 8/15/96 18:00:00. pH probe failed 8/15/96 18:30:00 to 8/18/96 15:30:00. Negative DO data deleted the following times: 8/2/96 15:30-8/15/96 14:00, 8/20/96 00:30, 06:00-07:30, 11:00, 14:00, 8/21/96 02:30-03:00, 8/23/96 06:30-07:00, 18:30- 20:00, 8/24/96 07:30-08:00, 19:00-21:00, 8/25/96 08:30-09:00, 8/28/96 22:00, 8/28/96 23:00-8/29/96 00:30, 8/29/96 15:00-15:30, 16:30-17:00, 8/30/96 00:00, 22:30-8/31/96 02:30. September 1996 PR: pH probe failed 9/1/96 00:00:00 to 9/1/96 11:00:00. pH probe failed 9/7/96 15:30:00 to 9/11/96 17:00:00. JB: D.O. data removed due to negative values 9/1/96 01:30-02:00, and 23:30:00 to 9/11/96 18:00:00. A spike in Specific Conductivity and depth occurred on 9/6/96 22:00 through 9/7/96 03:30 possibly due to the instrument being out of water. Post deployment information LOGICAL CONSISTENCY REPORT: NACOMPLETENESS REPORT: Data collection period Data loggers were placed in the water in early July and removed in late November just after ice began to form at both sites. Deleted Data Missing Data *Note: No turbidity probes were installed on the YSI instruments during the 1996 year. April 1996 PR: data logger was not deployed until 4/19/96 12:00:00. JB: data logger was not deployed until 4/19/96 12:00:00. May 1996 JB: pH probe failed 5/16/96 15:00:00 to 5/30/96 15:00:00. removed for calibration 5/30/96 12:00:00 to 5/31/96 23:30:00. June 1996 PR: data loggers not deployed for servicing 6/4/96 14:00:00-6/10/96 13:00:00. pH probe failed 6/20/96 15:00:00 to 6/22/96 07:30:00. removed for calibration 6/27/96 14:00:00. pH probe failed 6/27/96 14:30:00 to 6/30/96 23:30:00. JB: removed for calibration 6/1/96 00:00:00 to 6/7/96 12:30:00. pH probe failed 6/10/96 13:00:00 to 6/20/96 13:30:00. No data due to instrument swap 6/27/96 15:00:00. July 1996 PR: pH probe failed 7/1/96 00:00:00 to 7/10/96 16:30:00. removed for calibration 7/10/96 17:00:00. D.O. data removed due to negative values 7/10/96 17:30:00 to 7/25/96 12:30:00. removed for calibration 7/25/96 13:00:00. D.O. data removed due to negative values 7/25/96 15:30:00 to 7/26/96 21:00:00. D.O. data removed due to negative values 7/27/96 04:30:00 to 7/27/96 21:00:00. D.O. data removed due to negative values 7/28/96 06:30:00 to 7/28/96 11:30:00. D.O. data removed due to negative values 7/29/96 07:00:00 to 7/29/96 11:30:00, 23:00:00. D.O. data removed due to negative values 7/30/96 09:30:00 to 7/30/96 13:00:00. D.O. data removed due to negative values 7/30/96 22:30:00 to 7/31/96 02:00:00. D.O. data removed due to negative values 7/31/96 11:30:00. D.O. data removed due to negative values 7/31/96 22:00:00 to 7/31/96 23:30:00. JB: No data due to instrument swap 7/10/96 14:30:00-16:00:00. pH probe failed 7/15/96 09:30:00 to 7/25/96 14:00:00 August 1996 PR: Negative DO data removed 8/1/96 00:00-8/2/96 16:00. removed for calibration 8/2/96 16:30:00 to 8/5/96 07:30:00. Negative DO removed 8/22/96 02:00. removed for calibration 8/22/96 07:30:00. pH probe failed 8/28/96 17:00:00 to 8/31/96 23:30:00. JB: removed for calibration 8/2/96 15:00:00 to 8/5/96 09:00:00. No data 8/22/96 08:30 due to retrieval and deployment of new instrument. D.O. data removed due to negative values 8/5/96 09:30:00 to 8/15/96 18:00:00. pH probe failed 8/15/96 18:30:00 to 8/18/96 15:30:00. Missing times due to low battery 8/29/96 15:00:00-15:30:00, 8/29/96 16:30:00-17:00:00, 8/30/96 16:00:00, 18:00:00, 8/31/96 17:00:00-18:00:00. Negative DO data deleted the following times: 8/2/96 15:30-8/15/96 14:00, 8/20/96 00:30, 06:00-07:30, 11:00, 14:00, 8/21/96 02:30-03:00, 8/23/96 06:30-07:00, 18:30-20:00, 8/24/96 07:30-08:00, 19:00-21:00, 8/25/96 08:30-09:00, 8/28/96 22:00, 8/28/96 23:00-8/29/96 00:30, 8/29/96 15:00-15:30, 16:30-17:00, 8/30/96 00:00, 22:30-8/31/96 02:30. September 1996 PR: pH probe failed 9/1/96 00:00:00 to 9/1/96 11:00:00. pH probe failed 9/7/96 15:30:00 to 9/11/96 17:00:00. removed for calibration 9/11/96 17:30:00 to 9/20/96 14:30:00. removed for the year 9/26/96 17:30:00. JB: D.O. data removed due to negative values 9/1/96 01:30-02:00, and 23:30:00 to 9/11/96 18:00:00. Missing times due to low battery 9/1 19:00-19:30, 9/9/96 18:00-19:00, 9/10 16:00-18:30. removed for the year 9/11/96 18:30:00. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Additional Description: Entry verification The data are uploaded to a PC from the YSI 6000UPG data logger and graphs are produced and quickly examined using the PC6000 software. Data files are then exported from the PC6000 format into Excel (for Windows NT 3.1) files where the headers, footers, and inappropriate spaces are removed. Plots of the data are made and suspect data (outliers) are dealt with accordingly. Removed data points and missing data are replaced with a periods (.). Edited files are merged to contain one full month for each data logger. Data is then QA/QC'd using the cdmomac(ro)3.xls macros and Appendix B., YSI 6000 Data Review and Editing Protocol. Dave Nemazie was responsible for data management. PROCESS DATE: 20060208
Access Constraints
Data collected in conjunction with the National Estuarine Research Reserve System's (NERRS) System-wide Monitoring Program (SWMP) is considered public information. Please see site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm LIABILITY: Distribution The Centralized Data Management Office re-processed all SWMP ... water data collected from 1995-2002 to include an identifying station code (three letter reserve code, two letter sampling site code and data type code), a four digit year date stamp (mm/dd/yyyy) and a corrected time column (hh:mm). With the new format, the use of periods to denote deleted or missing data has been abandoned. Hence, all periods contained in the SWMP water data collected prior 2003 were removed and left blank.
Use Constraints
The principal investigator (PI) listed in the enclosed metadata retains the right to be fully credited for having collected and processed the data. Please see the site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm.
