1. Experimental research basins in Austria - an inventory (by Gabriele Müller & Hubert Holzmann)
2. Hydrologic research in small basins in Belgium (by Valentijn Pauwels)
3. The hydrological research catchments of Czech Republic and Slovak Republic (by Ladislav Holko, 2006)
4. Experimental research basins in Italy -  an inventory (by Luca Brocca)
5. Status and perspectives of hydrological research in small basins in Europe (by Hubert Holzman, 2018) https://doi.org/10.18172/cig.3406
   

• ERB-Germany

German FRIEND-Water/ERB Working Group  The “FRIEND-Water/ERB“ working group deals with small hydrological research areas in Germany.

    Their website includes the Braunschwaig Declaration: The need for a global network of long-term small hydrological research basins (4 pages, Koblenz 2010).

• EURO FRIEND-Water

The FRIEND-Water program is a flagship initiative within the Hydrological Intergovernmental Program (IHP) from UNESCO. FRIEND stands for “Flow Regimes from International and Experimental Network Data”.

• LTER-Europe

The LTER-Europe (Long-Term Ecosystem Research in Europe) seeks to better integrate traditional natural sciences and holistic ecosystem research approaches that include studies of the human component. The LTER-Europe is the networking component of the European LTER and consists of 26 national LTER networks (as of April 2025).