iv 
Summer open-water and deep-water . 39 
dissolved oxygen criteria reference curves . 42 
Non-summer open-water dissolved oxygen criteria 
reference curve . 42 
Assessment of deep-channel instantaneous minimum 
dissolved oxygen criteria . 42 
Use of Percent Saturation as Dissolved Oxygen Criteria . 43 
Literature Cited. 45 
V. Refinements to the Shallow-Water Designated 
Use Assessment Procedures . 47 
Background. 47 
Shallow-Water Designated Use Attainment Assessment . 48 
Assessment based on the single best year of SAV . 50 
Assessment based on water clarity acres . 53 
Assessment based on CFD-based water clarity criteria attainment . 56 
Shallow-Water Designated Uses and SAV No-Grow Zones . 56 
Water Clarity Criteria Reference Curves. 57 
Literature Cited. 59 
VI. Chlorophyll a Criteria Assessment Procedures . 61 
State Water Quality Standards . 61 
Chlorophyll a Criteria Assessment Procedures . 62 
Literature Cited. 62 
VII. Shallow-water Monitoring and Application 
for Criteria Attainment Assessment . 63 
Design and Approach for Chesapeake Bay Shallow-Water Monitoring . 63 
Shallow-water monitoring design . 65 
Continuous monitoring component . 66 
Water quality mapping component . 67 
Schedule for Assessment of Shallow-Water Designated Use Habitats . . 68 
Extending the timeframe . 69 
Additional resources . 69 
Assessment based on reduced monitoring . 70 
Segment prioritization schedule . 74 
Dissolved Oxygen Criteria Assessments Using 
Shallow-water Monitoring Data . 75 
Temporal standardization . 75 
Scaling and interpolation issues . 77 
Water Clarity Criteria Assessments Using 
Shallow-water Monitoring Data . 78 
Analysis issues . 79 
Statistical modeling . 79 
Interpolation . 80 
Chlorophyll a Criteria Assessments Using 
Shallow-water Monitoring Data . 82 
Statistical modeling . 83 
(i 
Contents 
