> 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/structural-practices/filterstrip.str/con_vfs.md).

# con\_vfs

Runoff generated upslope a filter strip is not uniformly distributed across the entire length of the strip. 10% of the filter strip can receive between 25 and 75% of the runoff from the field.