Elkhorn Slough (ELK) NERR Water Quality Metadata January - December, 2002 Last updated August 25, 2003Entry ID: CDMO_elkwq01-12.02m
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: Research objectives Measurements are taken every 30 minutes over a three to four week period at four sites in Elkhorn Slough. One site South Marsh (SM) is in a relatively unimpacted side channel of the slough and the second, Azevedo Pond (AP) is in a pond that receives fertilizer and pesticide runoff from an adjoining strawberry field. The third site, North Marsh (NM), was added in April 1999 and ... is located in an area where there is both agricultural and non-agricultural runoff. The fourth site Vierra Mouth, added March 14, 2001, is located at the mouth of the slough and is used to identify oceanic influence. The purpose of this research is to identify the base parameters for Elkhorn Slough by using South Marsh as the control site and the other three sites are impacted sites and monitored for possible future problems.
Associated researchers and projects Elkhorn Slough National Estuarine Research Reserve and the Elkhorn Slough Foundation have had an ongoing program to monitor estuarine water quality in the central Monterey Bay region since 1988. Currently, 24 stations are monitored monthly for temperature, salinity, dissolved oxygen, pH, turbidity, nitrate, ammonium and dissolved inorganic phosphate concentrations. Two of these stations on the Reserve are about 400 m from the SM site. Data collection began at these two stations in September 1989. A monthly monitoring station is also located at Azevedo Pond within 10 m of the YSI deployment. Monthly data from the Azevedo Pond are available from March 1992. The University of California Santa Cruz Agro Ecology Program has an ongoing project to examine the effects of agricultural production on an adjacent wetland. Matthew Werner, Marc Los Huertos, Felecia Rein, Sean Swezey, Mark Silberstein, Andrew De Vogelaere, Ron Tjeerdema have been the principal investigators. There are many projects associated with Elkhorn Slough. Please contact this NERR site for a list of ongoing research projects. II. Physical Structure Descriptors Other remarks/notes A) There were a few instances at this NERR site where turbidity recorded small negative values (-0001 and -0002). Because turbidity has a range of accuracy of +/-2 NTU, the technician did not edit or deleted these values in any way. B) December was a very wet month in this area and during this month. A total of 160 mm of rain fell for the month. This had significant effects on water quality our sites especially salinity and turbidity.
SPATIAL DATA ORGANIZATION INFORMATION:
Indirect Spatial Reference: Site location and character Elkhorn Slough is located on the West Coast of the United States in Central California. It connects with the Pacific Ocean in central Monterey Bay near Moss Landing, California. There are three sampling sites. SM (South Marsh) is in a side channel of the slough and is relatively unimpacted by anthropogenic influences. The YSI is located on the side of a bank in one of the secondary slough channels. AP (Azevedo Pond) (36Âº 50' 44.64"N, 121Âº 45' 13.24" W) is in a pond that receives fertilizer and pesticide runoff from a strawberry field in year-round production. The YSI is located about 10m from a culvert connecting the pond to the slough. Tide ranges from 0 to 1.3 meters, salinity ranges from 8.8 during heavy runoff to 41 ppt during strong evaporation, the sonde is located approximately 30 cm off the bottom, the bottom habitat is silty mud. Depth for this site is approximately 1 meter. NM (North Marsh) (36Âº 50' 4.75" N, 121Âº 44' 18.33" W) is located in between South Marsh and Azevedo Pond. This site is impacted by both agricultural and urban runoff. With a mean depth of 1 meter, the tidal range is approximately 0.4 meters., salinity ranges between 20 and 40 parts per thousand, there is freshwater runoff from agriculture and upland runoff. The sonde is approximately 30 cm off the bottom and the bottom habitat is silty mud. SM (South Marsh) (36Âº 49' 05.00"N, 121Âº 44' 21.83" W) is located approximately 3 km south of NM and is surrounded by mostly reserve land. This site receives runoff mostly from uplands and some from cattle ranches. This site receives the least amount of pollution. The tidal range from 0 to 3 meters, the salinity range is from 22 to 36 parts per thousand and is approximately 30 cm off the bottom. The bottom is slightly compacted silty mud. Depth for this site is approximately 2 meters. The fourth site VM (Vierra Mouth) (36Âº 48' 39.95" N, 121Âº 44' 45.40" W) is located at the mouth of the slough and is used to identify oceanic influence. With a mean depth of 2.5 meters, the tidal range is from 0 to 3.2 meters, salinity ranges from 26 to 34 parts per thousand and the sonde is located approximately 30 cm off the bottom. The bottom habitat is compacted mud and sand because there are strong tidal currents. This site receives drainage from the entire watershed since it is at the mouth. There are several auto wreaking yards located approximately 2 km east of this site.
Data Set Citation
Dataset Originator/Creator: Kerstin Wasson, John C. Haskins
Dataset Title: Elkhorn Slough (ELK) NERR Water Quality Metadata January - December, 2002 Last updated August 25, 2003
Dataset Release Date: 2006-02-09
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: 2002-01-01Stop Date: 2002-12-31
TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER PROCESSES/MEASUREMENTS > WATER DEPTH
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONDUCTIVITY
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > DISSOLVED GASES > DISSOLVED OXYGEN
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > PH
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > TURBIDITY
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > SALINITY
BIOSPHERE > ECOSYSTEMS > TERRESTRIAL ECOSYSTEMS > WETLANDS > ESTUARINE WETLANDS
BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > WETLANDS > ESTUARINE WETLANDS
Quality See http://cdmo.baruch.sc.edu/data/qaqc.cfm
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
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
1700 Elkhorn Road
Province or State: CA
Postal Code: 95076
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2006-02-09
Last DIF Revision Date: 2017-08-23