Fig. 3. (A) Contribution of different sources of N inputs (Kg/d) to the system of Varna Bay: green line—Varna Lake Current input, red line—Black Sea coastal current input (Resorts’ WWTPs), black line—cumulative nutrient inputs; (B) N concentration (g/m³) in Varna Bay: model results (cyan line) and data from field measurements (dark blue symbols).

Fig. 3