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Figure 4-3 (continued) (c) for Upper Mississippi River; and (d) for Willamette River. Sources: Brosnan and O'Shea, 1996; Brosnan et al., 2002; Hetling et al., 2001; Johnson and Aasen, 1989; Larson, 1999, 2001; Gleeson, 1972; Jaworksi, 1990, 2001; MWCOG, 1989; ODEQ, 1970; USEPA STORET; Bondelid et. al., 2000.

Delaware Estuary Model

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Delaware Estuary Model

.hilv 1Q7R nnnriitinns river mile' QR

(b) Potomac Estuary Model

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(b) Potomac Estuary Model

Çtentemher 1QR1 nnnriitinnG river mile 1tV%

Figure 4-4 Model simulation of DO under summer "dry" streamflow conditions at the critical oxygen sag location for primary, secondary, and better-than-secondary effluent scenarios for case studies of: (a) Delaware estuary; (b) Potomac estuary.

(c) James Estuary Model

September 1983 conditions, river mile 90

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