COD,BOD,TOD,TOC, for a kind of water, is there a certain relationship between them in quantity? why

TOC and TOD are both combustion chemical oxidation reactions, the former is expressed by carbon, while the latter is expressed by oxygen. The aerobic process of TOC and TOD is essentially different from that of BOD, and the biochemical process is also quite different because of the different components of organic substances in various water samples. There is no fixed correlation between TOC or TOD and BOD among various water qualities. Under the same water quality conditions, there is a certain correlation between BOD and TOC or TOD.