# Richards equation

> non-linear partial differential equation that represents the movement of water in unsaturated soils

**Wikidata**: [Q2151066](https://www.wikidata.org/wiki/Q2151066)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Richards_equation)  
**Source**: https://4ort.xyz/entity/richards-equation


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)