amount of oxygen dissolved in water for bod depends upon which factors?
Answers
Dissolved oxygen concentrations are constantly affected by diffusion and aeration, photosynthesis, respiration and decomposition. While water equilibrates toward 100% air saturation, dissolved oxygen levels will also fluctuate with temperature, salinity and pressure changes ³
Low dissolved oxygen levels may be dangerous for aquatic life such as fish. Oxygen enters water through diffusion from air, wind and wave action and plant photosynthesis. Dissolved oxygen levels are increased by supplementing wind and wave action, adding plants to water and exposing water to purified oxygen.
Dissolved oxygen levels below 3 ppm are stressful to most aquatic organisms. ... Low dissolved oxygen levels can be the result of elevated temperature and thus the inability of the water to hold the available oxygen. Low dissolved oxygen levels can also indicate an excessive demand on the oxygen in the system.