68 
Click Stations for Data 
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Click Legend Symbol* lo 
Toggle Stallone On Ott 
Fixed Monthly 
Station* - Current & 
Historical Data 
Real-Time 
Continuous Monitor* 
Near-Time 
Continuous Monitors 
• Continuous Monitors 
Coming Soon! 
Water Ouallty 
Mapping 
2005 Current Algal 
Bloom Events 
Figure VII-3. The 2005 fixed dataflow and continuous monitoring station map from the 
Maryland Department of Natural Resources' "Eyes on the Bay" website. 
Source: Maryland Department of Natural Resources — www.eyesonthebay.net. 
probes of a YSI 6600 sonde (http://mddnr.chesapeakebay.net/sim/dataflow_instrumen- 
tation.cfm). The system uses the same YSI 6600 sonde as the continuous monitoring 
buoys and measures the same suite of six parameters—dissolved oxygen, fluorescence, 
turbidity, temperature, salinity, and pH. A Global Positioning System (GPS) unit is inte¬ 
grated into the computer system to measure the spatial position of each recorded 
measurement. Data are collected every four seconds as the boat follows a cruise track 
that traverses between shallow and open waters. These data are then interpolated to 
provide a high-resolution map of surface water quality conditions (see Chapter 2 for 
further details). Each segment is mapped monthly from April through October or March 
through November. The vessel stops at different locations throughout a segment for 
discrete measurements of photosynthetically active radiation (PAR), Secchi depth, and 
dissolved oxygen along with collection of water samples for laboratory analysis of 
chlorophyll a (for use as calibration data). These “calibration” sites often overlap with 
existing open-water fixed-station sites and continuous monitoring sites; they represent 
the dynamic range of water quality in that segment. 
SCHEDULE FOR ASSESSMENT OF SHALLOW-WATER 
DESIGNATED-USE HABITATS 
The current level of shallow-water monitoring is insufficient to conduct detailed 
water quality criteria assessments in all Chesapeake Bay shallow-water habitats by 
the Chesapeake 2000 agreement deadline of 2010 (Chesapeake Executive Council 
2000). Three possible actions might remedy this problem. The first is extending the 
deadline beyond 2010 for assessment of all Bay shallow-water habitats. The second 
chapter vii 
Shallow water Monitoring and Application for Criteria Assessment 
