Mathematical introduction of sediment oxygen demand, Photosynthesis & Respiration and Solids Deposition Processes

In this paper we have presented mathematical introduction of Sediment Oxygen Demand, Photosynthesis & Respiration and Solids Deposition process as a transformation process, these process are very important in the study of water quality, which are constituent-specific, which affect all water quality parameters. The major factors affecting SOD are temperature, oxygen concentration at the sediment water interface (available oxygen), makeup of the biological community, organic and physical characteristics of the sediment, current velocity over the sediments, and chemistry of the interstitial water. In Photosynthesis & Respiration, the net algal oxygen production minus consumption is simulated by QUAL-II, and in solid deposition process, settling is enhanced by flocculation and hindered by ambient turbulence. In rivers and coastal areas, turbulence is often sufficient to distribute the suspended-solids over the entire water depth.