> 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/basin.md).

# Watershed Configuration

SWAT+ offers considerable flexibility with regard to the configuration of a watershed. The elements of a watershed are defined as spatial objects:

* Landscape Unit
* Routing Unit
* HRU
* Aquifer
* Channel
* Reservoir
*

Gravity-based exchange of water between spatial objects is defined in so-called connect files.