> 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/hydrology/snow.sno/cov50.md).

# cov50

SWAT+ assumes a non-linear relationship between snow water and snow cover. This parameter defines the fraction of the snow volume represented by [snow\_h2o](/io-docs/introduction-1/hydrology/snow.sno/snow_h2o.md) that corresponds to 50% snow cover.