> 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/aquifers/aquifer.aqu/revap_min.md).

# revap\_min

Movement of water from the aquifer to the unsaturated zone is allowed only if the depth from the surface to the water table is equal to or smaller than *revap\_min*.