> For the complete documentation index, see [llms.txt](https://docs.oacg-hydrology.site/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.oacg-hydrology.site/english/contacts.md).

# Contacts

## Observatory of Water and Global Change (OACG)

The Observatory of Water and Global Change (OACG) is a research unit of the [School of Geography of the University of Costa Rica](https://www.ucr.ac.cr/). It is an interdisciplinary group of academics, professionals, and students who work on issues related to water and global change from research, teaching, and social action.

**Email**: [oacg@ucr.ac.cr](https://app.gitbook.com/s/-MFVwnsCvMhZ6wGot0Rs-1703796690/oacg@ucr.ac.cr)

**Web Site**: [OACG.UCR](https://www.oacg.fcs.ucr.ac.cr/)

**Social Media**: [Facebook](https://www.facebook.com/OACG.UCR)

## Dr. Christian Birkel

Leader of the **OACG**. Doctor in Hydrology focused on the measurement and simulation of *streamflow generation processes* and the *storage of water* and *biogeochemical substances*.

**Email**: [christian.birkel@ucr.ac.cr](https://app.gitbook.com/s/-MFVwnsCvMhZ6wGot0Rs-1703796690/christian.birkel@ucr.ac.cr)

**Profile**: [URC](https://www.geografia.fcs.ucr.ac.cr/index.php/quienes-somos/recurso-humano/christian-birkel) | [ResearchGate](https://www.researchgate.net/profile/Christian_Birkel)

## Dr. Saúl Arciniega Esparza

External collaborator of the **OACG**. A civil engineer with a master's and a doctorate in hydraulics oriented to the management of water resources, the use of remote sensing in hydrology, and data science.

**Email**: [zaul.ae@gmail.com](https://app.gitbook.com/s/-MFVwnsCvMhZ6wGot0Rs-1703796690/zaul.ae@gmail.com)

**Profile**: [ResearchGate](https://www.researchgate.net/profile/Saul_Arciniega-Esparza)

**Social Media**: [Twitter](https://twitter.com/zaul_arciniega) | [LinkedIn](https://www.linkedin.com/in/sa%C3%BAl-arciniega-esparza-07ab9b122/)