| 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 |