> 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/theoretical-documentation/section-8-water-bodies/impoundment-water-routing/reservoirs/outflow/measured-daily-outflow.md).

# Measured Daily Outflow

When measured daily outflow (IRESCO = 3) is chosen as the method to calculate reservoir outflow, the user must provide a file with the outflow rate for every day the reservoir is simulated in the watershed. The volume of outflow from the reservoir is then calculated:

&#x20;          $$V\_{flowout}=86400\*q\_{out}$$                                                     8:1.1.8

&#x20;      where $$V\_{flowout}$$ is the volume of water flowing out of the water body during the day (m$$^3$$ H$$*2$$O), and $$q*{out}$$ is the outflow rate (m$$^3$$/s).
