Armenia is occupying Azerbaijan's territories though military aggression and violates international conventions by conducting hydro-terrorism activities. The Caucasus region covers the intersection of Europe and Asia, as well as territories between the Black Sea and the Caspian Sea. The trans-boundary water basins of 8 states in the region are in a joint dependence. The water resources of the Republic of Azerbaijan are 30.9 km3; about 70% (20.3 km3) of these are formed in the neighboring countries. It should be noted that these rivers flow into our country polluted. In general, the Republic of Azerbaijan is considered a country with limited water resources. The amount of river water per capita is 3219 m3 / year. If we take into account only local water resources, then this figure will be 1104 m3 / year. The ancient Azerbaijani lands play a major role in the water supply of the Armenian population as 81% of rivers' water resources in the occupied Nagorno-Karabakh region of Azerbaijan are formed in Kalbajar region.