Fig. 5. (A) Secchi depth (m) model output for Varna Bay (year 2001): red line—without N removal, blue line—with 75% N removal (Scenario I); green line—with 75% N removal and CSO reduced by 80% (Scenario II); (B) red bars—volumes of CSO (m³/d), green bars—volumes of WWTP discharged storm waters (m³/d)

Fig. 5