> For the complete documentation index, see [llms.txt](https://futurewater.gitbook.io/sphy-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory.md).

# Theory

- [Background](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/background.md)
- [Modules](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/modules.md)
- [Reference and potential evaporation](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/reference-and-potential-evaporation.md)
- [Dynamic vegetation processes](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/dynamic-vegetation-processes.md)
- [Snow processes](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/snow-processes.md)
- [Glacier processes](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/glacier-processes.md)
- [Soil water processes](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/soil-water-processes.md)
- [Soil erosion processes](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/soil-erosion-processes.md)
- [Routing](https://futurewater.gitbook.io/sphy-manual/manual/sphy-manual-3.0/theory/routing.md)