Welcome

This site contains background information about my activities as an assistant-professor in hydrogeology at the Faculty of Earth and Life Sciences at the Vrije Universiteit, Amsterdam.

My main research interests are the modeling of chemical reactions in groundwater and the dynamics of fresh and saline groundwater in coastal aquifers, including their offshore extensions. More...

I teach an introductory course in hydrology, a course in groundwater modelling and field courses in geology and hydrology in the Netherlands and abroad. More...

On January 6th, 2004 I defended my PhD. thesis that was titled 'Groundwater salinization processes in the coastal area of the Netherlands due to transgressions during the Holocene'. More...

This site also serves as the main resource of PHREEQC for Windows, a graphical user interface for PHREEQC that has become widely used. More...