Aqueous Systems of Dissolved Oxygen in Reservoir

¹ Postgraduate Program of Environmental Studies, Universitas Padjadjaran, Jl. Dipatiukur No. 35 Bandung 40132, Bandung, West Java, Indonesia
² Faculty of Math and Sciences, Universitas Padjadjaran, Jl. Raya Bandung Sumedang KM 21 Jatinangor, Sumedang, West Java, Indonesia
³ Center of Environmental and Sustainibility Sciences, Universitas Padjadjaran, Jl. Sekeloa Selatan 1, Bandung 40132, West Java, Indonesia

Abstract

Oxygen plays a crucial role in aquatic ecosystem particularly for supporting aquaculture and hydropower. In freshwater, importance of oxygen is for metabolic respiration and balance for heterotrophic organisms. Oxygen is also involved in various chemical equations in which compounds influence each other. To prevent oxygen depletion, understanding the changes in DO and all interactions with other water qualities been reviewed with purposed to know aqueous systems work. Photosynthesis by phytoplankton is the main production of dissolved oxygen. Carbon dioxide as output from respiration of microorganisms and degradation of organic inputs and light as energy transformation of photosynthesis is needed in the process. The temperature level is involved as a determinant of gas solubility. There is also gas exchange from atmosphere to water as oxygen diffusion that move toward an equilibrium. However, dissolved oxygen absorption occurs in high demand in case an oxidizer in the degradation of organic matter which come into the reservoir. In eutrophic condition, the abundance of phytoplankton also requires oxygen for respiration, especially at night. The consumption of dissolved oxygen often spurs reservoir managers to monitor the input into the reservoir to build an aerator as a form of ensuring adequate dissolved oxygen circulation.