| ACSAD | 
Arab Center for the Studies of Arid Zones and Drylands | 
| AQUASTAT | 
FAO's global information system on water and agriculture | 
| EMWIS | 
Euro-Mediterranean Information System on know-how in the Water sector | 
| EUROSTAT | 
Statistical office of the European Union | 
| GEOSS | 
The Global Earth Observation System of Systems | 
| GCMD | 
Global Change Master Discovery (NASA) | 
| HOA | 
Hydrological Observatory of Athens | 
| ICARDA | 
The International Center for Agricultural Research in the Dry Areas | 
| PHG | 
Palestinian Hydrology Group | 
| Plan Bleu | 
Regional Activity Center | 
| WRI | 
EarthTrends Environmantal Information |