> 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/flo_max.md).

# bf\_max

Baseflow rate at which all streams linked to an aquifer receive groundwater flow

This parameter determines the daily groundwater flow amount needed for all channels linked to an aquifer to receive groundwater flow. If groundwater flow < *flo\_max*, the channels with the smallest drainage areas will stop receiving groundwater flow. The amount of groundwater flow a channel receives depends on the channel length.

{% hint style="info" %}
This parameter is only active when the file [**aqu\_cha.lin**](/io-docs/introduction-1/connectivity/aqu_cha.lin.md) is used instead of [**aquifer.con**](/io-docs/introduction-1/connectivity/hru.con.md) to connect aquifers to channels.&#x20;
{% endhint %}