> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/introduction-1/channels/nutrients.cha/cbn_bod_co.md).

# cbn\_bod\_co

If routing is performed on an hourly time step, the units of **cbn\_bod\_co** are converted to 1/hr by the model.