> 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/connectivity/hru.con/elev.md).

# elev

The elevation of HRUs is used to adjust precipitation and temperature when lapse rates are defined in [**parameters.bsn**](/io-docs/introduction-1/basin-1/parameters.bsn.md) ([plaps](/io-docs/introduction-1/basin-1/parameters.bsn/s_max.md) and [tlaps](/io-docs/introduction-1/basin-1/parameters.bsn/n_fix.md)). The elevation of the remaining objects is not used by the model. 

{% hint style="warning" %}
Even though the elevation of most objects is not used by the model, a value has to be specified in the area column to make sure the file gets read correctly. 
{% endhint %}