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Eyes on the Bay Data Types Overview:

The table below gives an overview of the types of water quality data collected by Eyes on the Bay, this may help you determine what data type best suits your data needs. You can also refer to this Station Timeline Chart to see which stations were sampled in each year.

  Continuous Monitoring Long Term Fixed Monthly Monitoring Surface Mapping (DATAFLOW) Vertical Profiler
Sampling type: Deployed in-situ water quality meter, coupled with bi-weekly on-site measurements and sampling (referred to as 'calibration data') Profile sampling at discrete stations from stationary boat or bridge Surface mapping program, sampling surface water from moving boat Anchored multi-depth profiler at discrete location
Sampling description: Autonomous water quality meters, exchanged every 2 weeks for cleaning & calibration Water quality profiles, and nutrient, sediment and chlorophyll samples taken Monthly sampling at a few sites each year Autonomous vertical water quality profiler anchored at one site per year
Sampling depth: 1 meter below surface or 0.3 m or 0.5 m off-bottom Water quality profiles: measurements taken at discrete depths based on site depth Surface water is pumped through a chamber where water quality is measured by a meter similar to those used in the continuous monitoring program Measurements recorded every 1-2 meter depth intervals

Sampling frequency:

Continuous meter: recorded every 15 mins Cruises are monthly or bimonthly Data recorded every 4 secs while underway Conducts a profiling sequence every 1-3 hours
Sampling duration: April-October; or annually, weather permitting Annually April-October Annually, as weather permits

Water quality profile done?

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During bimonthly instrument exchange ('calibration data')
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WATER QUALITY METER PARAMETERS:
  Continuous Monitoring Long Term Fixed Monthly Monitoring Surface Mapping (DATAFLOW) Vertical Profiler
Water temperature (°C) checkmark checkmark checkmark checkmark
Specific conductance (mS/cm=mmhos/cm) checkmark checkmark checkmark checkmark
Salinity
(ppt)
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Dissolved oxygen (mg/L) checkmark checkmark checkmark checkmark
Dissolved oxygen (% saturation) checkmark checkmark red X mark checkmark
pH checkmark checkmark checkmark checkmark
Chlorophyll
(µg/L)
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Blue Green Algae BGA (µg/L) checkmark
(at select sites)
red X mark red X mark red X mark
Turbidity
(ntu)
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Water Depth
(m)
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(bottom sites)
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Algal identification

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(if bloom observed)

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(at select sites, or if bloom observed)

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(if bloom observed)

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(if bloom observed)
  OTHER MEASUREMENTS:
 

Continuous Monitoring
(~Every 2 Weeks)

Long Term Fixed Monitoring
(Monthly/Bimonthly)

Surface Mapping (DATAFLOW)
(Monthly)

Vertical Profiler

(~Every 2 Weeks)
VSS, PC, PIP, TDN, TDP, NH4,TN, TP, PO4, NO2, NO23 checkmark
(at NERRS sites)
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(at select sites)
   
Chlorophyll a, Pheophytin a, & Total Suspended Solids (TSS) checkmark

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(at select sites)
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(water sample)
 
Alkalinity

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(Harris Creek only)

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(at select sites)
   
Photosynthetic Active Radiation (PAR) / Light Attenuation

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Secchi depth
(m)
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Data available on Eyes on the Bay? checkmark
Archived & Current Year Continuous Monitoring Data in summary download form, and raw data (for short time intervals). Longer intervals of data can be requested.
We also have a Continuous Monitoring Chart Query available for data visualization.
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Charts of Long-Term Monitoring min, max and average results versus current monthly conditions. Data can be downloaded from CBP DataHub
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DATAFLOW Maps & Data: Data are integrated as surface maps of temperature, salinity, DO, turbidity, and chlorophyll a.
Raw data can also be downloaded.
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Vertical Profiler Data are currently available for download for 2001-2016 for Harris Creek, with other station data to come. Raw data can be requested.
Data available on Chesapeake Bay Program (CBP) Data Hub? checkmark
The biweekly 'calibration data' are available on CBP Data Hub (under Shallow-Water Monitoring Program), but 15 min increment meter data are not

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Yes, all data are available on CBP Data Hub

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The biweekly data are available on CBP Data Hub (under Shallow-Water Monitoring Program), but underway data are not
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The biweekly 'caibration data' are available on CBP Data Hub (under Shallow-Water Monitoring Program), but 15 min increment meter data are not