1. Acquaculture Systems and Plants Water stocking management for irrigation

2. THE LAKE DEFINED WATER MASS, COLLECTED IN A NATURAL SINK OF HEART SURFACE NOT LESS 3-5 MT DEEP

3. …..AN ECO-SYSTEM ALWAYS EVOLVING AND GOING TO FILL UP BY SEPARATED STEPS CYCLE DUE TO UNDERGROUND PROCESS

4. SEDIMENTATION …..INORGANIC MATERIAL AND ORGANIC PRODUCTS CARRIED BY TRIBUTARIES SETTLE AND IMPROVE THE ACQUATIC VEGETATION DEVELOPMENT

6. POTENTIAL POLLUTION REASONS

7. POTENTIAL POLLUTION REASONS: - Agricultural production Draining water

8. POTENTIAL POLLUTION REASONS: - Agricultural production Draining waterRain water

9. POTENTIAL POLLUTION REASONS: - Agricultural production Draining waterRain water Chemicals: - Fertilizers -Herbicides/Pesticides

10. POTENTIAL POLLUTION REASONS: - Agricultural production Draining waterRain water Chemicals: - Fertilizers - Disinfectant products Deposits from plants and ground

11. MUD ACCUMULATION: The waste accumulation from irrigation exceeded the lake’s disposal capacity

12. POND …GOES TO THE POND PHASE WITH VERY PLENTIFUL ACQUATIC VEGETATION

13. BENTIC ZONE APHOTIC ZONE PELAGIC ZONE PHOTIC COAST ZONE THE ENVIRONMENTS IN THE LAKE ECO-SYSTEMS LIGHT

14. In this case the oxygen exchange between upper and deep water is almost nul. The microbic oxidation of the organic products can fully exhaust dissolved oxygen in deep water and causes ANOXIA (lack of oxygen) not allowing acquatic organisms’s life No photosynthesis DEPTH TEMPERATURE OXYGEN DISSOLVED OXYGEN LAKE WITHOUT CIRCULATION

15. DAY AND NIGHT The oxygen is also produced by alga’s and acquatic plants’s photosynthesis. Sometimes photosynthesis production is so high that the water can saturate by oxygen. 120 %, 130 % water saturation.

16. DAY AND NIGHT DISSOLVED OXYGEN (mg l -1 ) TIME (hr) DAY PHOTOSYNTHESIS + O2- O2 RESPIRATIONNIGHT

17. DAY AND NIGHT DEPTH M 3 WATER TEMPERATURE (°C) WATER By day the air warms up and the upper water warms up more than in depth. By late afternoon and by night the air grows cool and the upper water grows cool still the lake de-stratifies

18. PREVAILING OF ANAEROBIC PROCESS - Anaerobic: “lack of oxygen (O 2 )” O2O2 NH 3 H2SH2S

19. ANAEROBIC PROCESS O2O2 NH 3 H2SH2S Produces: - Gas (bad smell) - Release of Ammonia / NH3 - Suitable conditions for alga growing - Potential food source for alga Species of Alga philamentosa Species of Plancton Alga

20. ANAEROBIC O2O2 NH 3 H2SH2S Produces: - Gas (bad smell) - Release of ammonia / NH3 - Suitable conditions for growing alga - Potential food source for alga Species of acquatic plant Lente palustre (Lemna) Species of acquatic fern Azolla rossa (Lemna)

21. THE IMPROVEMENT OF THE QUALITY OF WATER INVOLVES COSTS FOR: - DISINFECTION - FILTRATION - DISTRIBUTION PROCESS

22. MANAGEMENT PHILOSOPHY (1/2) - Stopping the anaerobic cycle - Adding Aeration/Circulation O2O2 NH 3 H2SH2S Submersed aeration and suction Circulation against destratification ANAEROBIC CYCLE Reduced amount of oxygen Conditions of de-stratification

23. MANAGEMENT PHILOSOPHY (2/2) - Chemical test against alga/acquatic plants growing - Adding Aeration/Circulation ANAEROBIC CYCLE Reduced amount of oxygen Suitable condition for alga growing Providing right chemical treatment Circulation against de- stratification O2O2 NH 3 H2SH2S

24. LIST OF PRODUCTS Aerators and Oxygenators ACQUA&CO FORCE 7.2 EOLO EO12 BRIO 1.0 RIO AG20 SPLASH

25. MANAGEMENT PHYLOSOPHY FIRST: - Treatment of the problem - Chemical treatment (if suitable) - Establishing aeration and circulation mechanic systems and technologies NEXT: - Removal/alteration of environmental conditions - Establishing aeration and circulation mechanic systems and technologies - Operation test at home in order to remove/reduce the influence of the irrigation draining